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Copyright of Mustafa Kemal University Journal of Agricultural Sciences / Mustafa Kemal Üniversitesi Tarım Bilimleri Dergisi is the property of Mustafa Kemal University, Faculty of Agriculture and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Agriculture & Nature / Kahramanmaraş Sütçü İmam Üniversitesi Tarım & Doğa Dergisi is the property of Kahramanmaras Sutcu Imam Universitesi and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of COMU Journal of Agriculture Faculty / ÇOMÜ Ziraat Fakültesi Dergisi is the property of Canakkale Onsekiz Mart University and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Mustafa Kemal University Journal of Agricultural Sciences / Mustafa Kemal Üniversitesi Tarım Bilimleri Dergisi is the property of Mustafa Kemal University, Faculty of Agriculture and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The increase in the duration and severity of summer droughts due to global climate change will adversely affect forests, and it is very important to examine the drought stress that trees are exposed to as a species due to increasing drought and to understand the response of the species. In this study, the effects of drought stress on physiological (midday water potential, relative water content, gas exchange parameters) and biochemical (total soluble sugar content) characteristics were investigated in Quercus trojana P.B. Webb. seedlings. Under greenhouse conditions, two treatments were applied to 1+0 old seedlings: control (2-3 times a week for watering) and drought stress (no watering for 30 days). Drought stress was repeated twice, consecutively. At the end of the two-month stress cycle, drought stress decreased the midday water potential, relative water content, net photosynthesis rate, stomatal conductance and transpiration rate, while increasing the water use efficiency and total soluble sugar content. In the study, strong relationships were found between midday water potential, net photosynthesis rate, stomatal conductance, transpiration rate and total soluble sugar content.

Copyright of COMU Journal of Agriculture Faculty / ÇOMÜ Ziraat Fakültesi Dergisi is the property of Canakkale Onsekiz Mart University and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

In this study, it was aimed to investigate the impact of water stress on germination and determine drought tolerant provenances in different Anatolian Black Pine provenances. Levels of water stress between 0 and -0.8 MPa were applied by using solution of PEG-6000 and germination tests were carried out. Our results revealed that germination values significantly decreased with increasing water stress level among provenances. Accordingly, Nallıhan, K. Hamam, Çerkeş and M.K. Paşa provenances, which represent regions with lower rainfall, had higher germination values up to -0.6 and -0.8 MPa water stress levels compared to other provenances. In this respect, mentioned provenances were found to be more resistant to drought. This result shows that there are variations within species in Anatolian Black Pine in terms of drought tolerances. Using provenances, which are determined to be drought-tolerant in this study, can increase afforestation success in semi-arid regions.

With climate change, global warming has increased adverse effects on living things in our country. In these adverse effects, water scarcity is the most crucial problem due to the increase in temperature and decrease in precipitation. Forests are the most affected ecosystem among others by water scarcity in our country. This study tried to determine the 5-year-old seeds and 1-year-old seedlings (produced from the same seeds) of some Turkish red pine provenance’ responses to different water stress levels. First, how the water stress levels (0, -0.2, -0.4, -0.6, -0.8 MPa) affect seed germination of these provenances was determined. Secondly, gas exchange parameters [net photosynthesis (Anet), stomatal conductance (gs), transpiration (E), and intrinsic water use efficiency (iWUE)] under different water stress were determined in the seedlings obtained from these species' seeds. As a result of the germination test, Denizli-Çameli (DC) provenance had the highest rate (48%), while Maraş-Suçatı had the lowest rate (29%) under control treatment. The highest germination rate was obtained in Burdur/Bucak provenance (5%) under -0.2 MPa osmotic potential. For gas exchange parameters, Antalya/Gündoğmuş provenance had the highest Anet, gs values while DC provenance had the lowest Anet, gs, and E values when provenance is considered as a single factor. Besides, increasing in irrigation increased Anet, gs, and E while decreased the iWUE. The lowest seedling E under water stress can be explained because this species responds to the water shortage by closing its stomata. Among the Turkish red pine origins, DC provenance showed higher drought tolerance than others.

The climate is the dominant regulator that determines the cultivation in a viticulture region as it strongly controls vine physiology, vine growth, canopy microclimate, berry quality and finally wine components. However, the effects of climate change force vine producers to find solutions that will facilitate their adaptation processes. The importance of water management in vineyards is becoming more important every day for sustainable viticulture and winemaking. Efficient use of water in vineyards is an important issue to control the yield and to provide the targeted berry quality at the desired level. This experiment was carried out during the 2013-2014 and 2015 growing seasons to evaluate the effects of green pruning practices on water leaf potentials of 12-14 years old grapevines of cv. Merlot (Vitis vinifera L.) grafted onto Kober 5BB in the experimental vineyard of Tekirdag Viticulture Research Institute in Turkey. A completely randomized block design was used: LRMS1, LRMS2, LRMS3 represent three levels of leaf removal treatments on main shoots and LRLS1, LRLS2, LRLS3 represent three levels of leaf removal treatments on lateral shoots. Due to the relatively high soil moisture in vineyard conditions, no extreme and high-water stress levels was observed in experiment years. The main factor controlling the water status in cv. Merlot vines was largely dependent on the meso-climatic conditions and soil water availability during the growing season. However it was observed that increasing of main shoot length give rise to tendency to water stress. It was determined that leaf removal treatments on lateral shoots caused changes in shoot weight, pruning weight and Ravaz index (RI), especially in 2014 whereas the leaf removal treatments on main shoots caused changes in mentioned parameters in 2015. In conclusion, the results show that plant water condition can be managed with summer pruning taking into account of different climatic conditions and different phenological stages. Planning of canopy management practices should be done by considering long- and medium-term meteorological evaluations while short-term planning within vegetation period should be done in relation to weekly and monthly meteorological data. [ABSTRACT FROM AUTHOR]

Copyright of Harran Journal of Agricultural & Food Science is the property of Harran University, Faculty of Agriculture and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Yuzuncu Yil Universitesi Journal of Agricultural Sciences (YYU J Agr Sci) is the property of Yuzuncu Yil University and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Water stress is one of the important environmental constraints limiting olive productivity. This study was carried on olive (cv. Memecik) trees in Bornova Olive Research Institute in 2017. In this study, changes in stomatal conductance (gs) and sapflow under the deficit irrigation conditions were observed. For this reason, four treatments were applied as follows; K1: non-irrigated (rainfed), K2: 100% ET, K3: 66% ET, K4: 33% ET. In this study (01/06/2017-30/09/2017), irrigation water requirement was ranged from 0 to 912 mm, evapotranspiration (ETa) varied from 91 to 851 mm. The mean stomatal conductance (gs) values calculated for during the period were 293.83 mmol m-2 s-1for K1, 382.62 mmol m-2 s-1 for K2, 371.50 mmol m-2 s-1 for K3 and 293.57 mmol m-2 s-1 for K4. The mean sapflow values calculated during the period were 0.054 ml cm-2 min-1for K1, 0.091 ml cm-2 min-1 for K2, 0.073 ml cm-2 min-1 for K3 and 0.065 ml cm-2 min-1 for K4. The seasonal average of the transpiration rate, which shows the ratio of the sap flow rate of the treatment to the sap flow rate of the control treatment (K2) in olive trees, was found to be 0.59, 1, 0.80, 072 for K1, K2, K3 and K4, respectively. According to the data obtained in this study, the difference between the stomatal conductance values of treatments was statistically significant. An important finding of the research is that there is a positive linear (r2 = 0.528) relationship between stomatal conductance and sap flow. In the light of the data obtained; It can be stated that stoma conductivity (gs) and plant sap flow measurement values can be used to determine the water stress of olive trees. [ABSTRACT FROM AUTHOR]

This study was conducted to determine number of flowering days under water stress and full irrigation conditions, the days required for the first and second cut time, and the GDD (Growing degree days) of sorghum x sudan grass hybrid varieties under Konya ecological conditions in 2017 and 2018 years. The study conducted in randomized blocks – split plots experimental design with 3 replications, the main parcels were irrigated (S1: Full irrigation; S2: Irrigation 50% of S1), and the sub plots were varieties (Hayday, Tonka, Aneto, Greengo, Sugargraze II, Master BMR, Forage King). In the study, the GDD values for flowering time were determined as 924 oC and 988 oC under full irrigated conditions (S1) in 2017 and 2018 years, respectively. While in water stress conditions (S2), the GDD values were determined as 1115.8 oC and 1078.2 oC in 2017 and 2018, respectively. For the first cutting, the GDD values were determined as 1116.4 oC and 1177.3 oC under full irrigated conditions (S1) in 2017 and 2018, respectively. In water stress (S2) conditions, the GDD values were determined as 1265 oC and 1255.5 oC in 2017 and 2018 years, respectively. In both years, the lowest GDD values were determined from Forage King variety (806.3-869.9 oC), in flowering period. While the highest GDD values were determined from Tonka variety (1110.7 oC) in 2017 and from Tonka, Greengo varieties (1113.3 oC) in 2018. [ABSTRACT FROM AUTHOR]

Copyright of Duzce University Journal of Science & Technology is the property of Duzce University Journal of Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Harran Journal of Agricultural & Food Science is the property of Harran University, Faculty of Agriculture and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

This study was carried out at Aydin Adnan Menderes University, Agriculture Faculty Field Crops Experiment fields under drip irrigation system to investigate the response of cotton hybrid populations to water stress in F8 generations in accordance with Augmented randomized complete block design. Each lines and five control varieties (Gloria, Flash, DP332, Candia and Claudia) were planted one row and 12 m long under irrigated (%100: full irrigation) and water stress (%50: deficit irrigation) conditions. The result of the study revealed that in F8 generation; Carmen x Nazilli-503 (line no: 1), DPL-90 x Tamcot-22 (line no: 10), BA-308 x Carmen (line no: 38), DPL-90 x Tamcot-22 (line no: 66) and ST-373 x DPL-90 (line no: 72) cotton advanced lines exhibited the highest seed cotton yield and fiber quality. As for under deficit water stress condition Nazilli-503 x Tamcot-22 (line no: 6), ST-373 x Carmen (line no: 23), BA-308 x Nazilli-503 (line no: 47), BA-308 x Carmen (line no: 72), and Ş-2000 x Tamcot-22 (line no: 90) were found to be drought resistant or tolerant hybrid populations. In order to register new cotton varieties with high yield and fiber quality suitable for full and limited irrigation conditions, selected cotton lines will be tested for variety yield tests. [ABSTRACT FROM AUTHOR]

Copyright of Yuzuncu Yil Universitesi Journal of Agricultural Sciences (YYU J Agr Sci) is the property of Yuzuncu Yil University and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Yuzuncu Yil Universitesi Journal of Agricultural Sciences (YYU J Agr Sci) is the property of Yuzuncu Yil University and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Drought decreases the growth and productivity in cotton. Heat shock proteins accumulate in plants under water stress to protect the biochemical and physiological processes at the molecular level. In this study, plants of T2 segregatinggenerationof transgenic cotton, containing small heat shock protein gene GHSP26 was compared with wild type plants for biochemical, physiological and molecular responses under different periods of drought stress. Transgenic plants accumulated 30% higher proline content than the wild type. Lipid peroxidation activity was reduced in transgenic plants which showed that the drought tolerance efficiency has been improved. Leaf relative water content was 69% and 45% in transgenic and wild-type plants, respectively at 10-day drought stress. Similarly, transgenic plants showed better performance for photosynthesis, stomatal conductance, transpiration and osmotic potential as compared to wild type. Real-time quantitative PCR of GHSP26 and some other drought responsive genes such as Gh-POD, Gh-RuBisCO, Gh-LHCP PSII, Gh-PIP, Gh-TPS and Gh-LEA have supported the higher expression and proved drought tolerance in transgenic plants. The overexpression of GHSP26 in transgenic plants improved the biochemical such as proline content and lipid peroxidation activity and physiological parameters like photosynthesis, osmotic potential and water related attributes. Hence, this study may be extended for selection of homozygous lines and breeding to improve the drought tolerance activity in plants

Copyright of Mediterranean Agricultural Sciences is the property of Akdeniz Universitesi Ziraat Fakultesi and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Mediterranean Agricultural Sciences is the property of Akdeniz Universitesi Ziraat Fakultesi and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Mustafa Kemal University Journal of Agricultural Sciences / Mustafa Kemal Üniversitesi Tarım Bilimleri Dergisi is the property of Mustafa Kemal University, Faculty of Agriculture and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Yuzuncu Yil Universitesi Journal of Agricultural Sciences (YYU J Agr Sci) is the property of Yuzuncu Yil University and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

This study was conducted to determine the yield, yield components and fiber quality parameters in a single plant progeny rows at F3:6 generation under the full and deficit irrigation conditions. The experiment was conducted at Adnan Menderes University, Agriculture Faculty in full and deficit conditions. In the full irrigation e×periment, 76 single plants, and in the experiment of deficit irrigation 68 single plants were planted. In addition, planting system was the augmented randomized complete block experimental design by performing 4 replications by 70 cm of row spacing and 12 m of row length. Under deficit irrigation (% 50) genotypic variation was found to be significant for all investigated parameters and, under full irrigation (% 100) condition significant variation was detected for seed cotton yield, fiber length and fiber strength. Based on seed cotton yield and fiber quality parameters of single progeny rows, it was concluded that Carmen × Tamcot-22, Carmen × Nazilli-503, Nazilli-503 × DPL-90, BA-308 × Carmen single progeny rows are promising in the full irrigation conditions, and Nazilli-503 × Tamcot-22, Carmen × Nazilli-503, Nazilli-503 × Şahin 2000, Carmen × Tamcot-22, BA-308 × Nazilli-503 was detected as promising hybrids in the deficit irrigation conditions. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Soil Science & Plant Nutrition / Toprak Bilimi ve Bitki Besleme Dergisi is the property of Soil Science Society of Turkey and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Agriculture Faculty Journal, Mustafa Kemay University / Ziraat Fakultesi Dergisi, Mustafa Kemal Universitesi is the property of Mustafa Kemal University, Faculty of Agriculture and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

This study was conducted in order to determine the effects of leaf water potential and cluster thinning applications on phytochemical properties of cv. Sangiovese. Four different leaf water potential (Ψleaf) applications; (Control (Non irrigated) (<0.7MPa), Ψpd nЄ (-0.3;-0.5] MPa, Ψpd nЄ (-0.3;-0.6] MPa, Ψpd nЄ (-0.3;-0.7] MPa) and two different cluster thinning applications; (non cluster thinning and 50% cluster thinning) were made. In this research, it was determined that the application of Ψpd nЄ (-0.3;-0.7 MPa) improves the phytochemical properties more than control treatment. Cluster thinning applications had an insignificant effect on leaf water potentials, whereas %50 Cluster Thinning application had an positive effect on the quality. As a result, Ψpd nЄ(-0.3;-0.7] MPa interval leaf water potential application and when the excessive yield existing, %50 Cluster Thinning could be recomended for the cv. Sangiovese. [ABSTRACT FROM AUTHOR]

This research was carried out with Şebin walnut variety (Juglans regia L.) to determine to the tolerance to stress conditions including salinity and water stress. The experiment was designed by factorial design in randomized blocks and lasted for 2 years. In the research, the plants were exposed with five irrigation water salinity levels (T0= control, T1= 1, T2= 2, T3= 3 and T4= 5 dS.m-1) and three irrigation water rates (S1= 1 liter, S2= 3 liters and S3= 5 liters per week) with four replications. Plants in T3 and T4 treatments, died at the trial of 2 years due to salt stress. While the plants in S1 treatments applied 1 liter of water per week died at 2.68 dS.m-1 levels in soil salinity (ECe); the plants with 3 liters of water application (S2) a week at the 5.34 ds.m-1 levels and the plants with 5 liters water application (S3) a week died at 10.95 ds.m-1 of soil salinity level (ECe). The total weight of plants in T0, T1 and T2 treatments, which survived until the end of experiment, were significantly affected by salinity level, water level and their interaction(p <0.01). Total plant weight decreased with the increase of salinity in irrigation water. Seedling development for T1 and T2 treatments were 23.9% and 37.5 lower than control plants, respectively. Only the effect of the water level was significant (p <0.01) on plant height. Although the plant height was affected by salinity level, differences of application were not significant. The trunk diameter of plants were significantly affected by only water level (p <0.01). The effect of salinity level on the trunk diameter was not significant. The effect of salinity level, water level and their interaction on the plant root and lateral root growth was significant at p <0.01 level. In comparison to the plants in T0, the roots' weight of plants in the T1 and T2 treatments showed a 14.8 and a 30.4 percent reduction in growth.The increase of water level in the S2 and S3 treatments resulted in an increase of 79% and 114% respectively, on the plant root weight compared to S1 treatment. The increase of salinity and the decrease of water reduced lateral root development The number fresh root of plants was significantly affected by only salinity (p <0.01). While the average number of fresh root were 5.3 and 4.1, respectively, it reduced to 0.2 in T2 treatment. Although the average number of fresh root were increased by the increase of irrigation water, differences of application were not significant. [ABSTRACT FROM AUTHOR]

The goal of this study was to determine the effect of water stress on biochemical changes of mahalep (Prunus mahaleb L.) rootstocks. For this purpose, three new seedling mahalep rootstocks and SL64 were used in this study. The rootstocks plants were planted into 40 liter pots with 1:2:1:0.5 ratio including sand:loam soil:peat:manure. During the experiment, four different stress levels of irrigation were applied to all rootstocks (S1: the soil was fully irrigated to reach field capacity in each irrigation, the irrigation levels of S2, S3 and S4 treatments; were % 75, % 50 and % 25 of irrigation water applied to S1 treatment). Chlorophyll content (chlorophyll a, chlorophyll b and total chlorophyll), pH, abscisic acid (ABA), total sugar and total starch were investigated as biochemical changes. Water stresses decreased pH, chlorophyll and total starch content and increased abscisic acid and total sugar content. [ABSTRACT FROM AUTHOR]

This research was conducted in Sarkoy district in Tekirdag province. Location of research plot was 40° 37' 49.98" N latitude and 27° 09' 28.00" E in longitude, with 41m altitude, in 2013 vegetation period. Experimental research design was completely randomized block in 4 blocks. Leaf water potential and cluster thinning applications were performed in order to determine cluster and berry characteristics. Four different levels of leaf water potentials (Ψleaf); Control Ψpd nϵ(-0,3; -0,5MPa], Ψpd nϵ(-0,3; -0,6MPa] and Ψpd nϵ(-0,3; -0,7MPa] and two levels of cluster thinning applications (CTA); non cluster thinning (NCT) and 50% cluster thinning (50% CT) were performed in this research. Cluster characteristics (cluster lenght, width, weight, volume, berry number in cluster) and berry characteristics (berry fresh and dry weight, % dry weight, berry volume, berry density, berry skin area calculation, berry skin area / berry volume calculation) were investigated. Ψpd nϵ(-0,3; -0,5MPa] application resulted in highest cluster weight and cluster width; but the lowest in berry dry weight. On the other hand Ψpd nϵ(-0,3; -0,7MPa] application increased the yield and quality values. Control application decreased yield and quality values. Cluster thinning application did not affect the leaf water potential significantly. As a suggestion in cv. Sangiovese leaf water potential should be between nϵ(-0,2; -0,35MPa] in berry set-veraison stage and between nϵ(-0,3; -0,7MPa] in veraison-maturity stage in order to increase the berry sugar concentration (°Brix) 50 % cluster thinning applications should applied. [ABSTRACT FROM AUTHOR]

Drought decreases the growth and productivity in cotton. Heat shock proteins accumulate in plants under water stress to protect the biochemical and physiological processes at the molecular level. In this study, plants of T2 segregating generation of transgenic cotton, containing small heat shock protein gene (GHSP26) was compared with wild type plants for biochemical, physiological and molecular responses under different periods of drought stress. Transgenic plants accumulated 30% higher proline content than the wild type. Lipid peroxidation activity was reduced in transgenic plants which showed that the drought tolerance efficiency has been improved. Leaf relative water content was 69% and 45% in transgenic and wild-type plants, respectively at 10-day drought stress. Similarly, transgenic plants showed better performance for photosynthesis, stomatal conductance, transpiration and osmotic potential as compared to wild type. Real-time quantitative PCR of GHSP26 and some other drought responsive genes such as Gh-POD, Gh-RuBisCO, Gh-LHCP PSII, Gh-PIP, Gh-TPS and Gh-LEA have supported the higher expression and proved drought tolerance in transgenic plants. The overexpression of GHSP26 in transgenic plants improved the biochemical such as proline content and lipid peroxidation activity and physiological parameters like photosynthesis, osmotic potential and water related attributes. Hence, this study may be extended for selection of homozygous lines and breeding to improve the drought tolerance activity in plants. [ABSTRACT FROM AUTHOR]

This study was conducted to determine the yield, yield components and fiber quality parameters in a single plant progeny rows at F generation under the full and deficit irrigation conditions. The experiment was conducted at 5 Adnan Menderes University, Agriculture Faculty in full and deficit conditions. In the full irrigation experiment, 124 single plants, and in the experiment of deficit irrigation 72 single plants were planted with control cotton varieties including BA 308, Gloria, Claudia, Carmen and Elsa. Augmented experiment design was used with 4 replications by 70 cm of row spacing and 12 m of row length. Under full irrigation genotypic variation was found to be significant for all investigated parameters and under deficit irrigation significant variation was detected for boll number per plant and seed cotton yield. The result of the study showed that in F6 generation; Carmen x Nazilli-503 (H: 11), Nazilli-503 x Şahin-2000(H: 109), Carmen x Nazilli-503(H: 119), ST-373 x DPL-90(H: 122) single progeny lines for full irrigation, and Carmen x Nazilli-503(H: 20), Nazilli-503 x Tamcot-22(H: 61), Carmen x DPL-90(H: 75) single progeny lines for deficit irrigation have been detected as promising hybrids based on yield, yield components, and fiber quality parameters. [ABSTRACT FROM AUTHOR]

This research was carried out on two years old olive (cv Ayvalık) trees grown in pots at field condition in Bornova Olive Research Station, Ministry of Food Agriculture and Livestock in 2011. Some morphological and physiological response of young olive tree to drought stress under different irrigation levels were investigated. For this reason, the experiment consisted of 4 treatments: 1) Irrigated at the level of 100% of the ETa (I100), 2) Irrigated at the level of 66% of the ETa (I66), 3) Irrigated at the level of 33% of the ETa (I33), 4) Non-irrigated (I0). Some physiologic responses of plants such as chlorophyll content (SPAD), stomatal conductance (gs), leaf temperature and air temperature difference (Ty-Ta) and also morphologic responses of the plant the trunk diameter, plant height, shoot diameter, shoot length were investigated. Irrigation water requirement was ranged from 0 to 82.45 liters/plant and actual evapotranspiration was ranged from 10.78 to 86.11 liters/plant. There were not a statistically significant difference among the treatmentsts (except I0) in terms of morphological parameters. In terms of chlorophyll content, statistically significant differences were not found among the treatmentsts (except I0), however, the leaf-air temperature differences and stomatal conductance values statistically significant differences were found among the treatmentsts. Ayvalik olive, is a drought-tolerant cultivar, recommended for growing in arid or water shortage areas. However, as a proposal determining the level of water stress in olive stomatal conductance and leaf and air temperature difference measurements can be used. [ABSTRACT FROM AUTHOR]

Bu çal ışma, 1993-1995 y ı lları aras ı nda Ankara Üniversitesi Ziraat Fakültesi Kenan Evren Ara şt ı rma ve Uygulama Çiftliğinde ekmeklik buğday ı n farkl ı gelişme dönemlerindeki su stresinin baz ı kalite özelliklerine etkilerini belirlemek amac ı yla yürütülmüştür. Çal ışmada Bezostaja 1, Gün 91 ve Gerek 79 ekmeklik bu ğday çeşitleri kullan ı lmışt ı r. Çeşitlerin belirli gelişme dönemlerindeki su stresine ili şkin sulama uygulamalar ı ; bitkilerin tüm gelişme dönemlerinde stressiz S1 , tane dolumu döneminde stresli S 2 , başaklanma öncesinde stresli S 3 , sapa kalkma döneminde stresli S4 ve bitkilerin tüm gelişme dönemlerinde stresli S 5 olmak üzere yap ı lmışt ı r. Araştı rma sonuçlar ı na göre; ele al ı nan kalite özellikleri bak ı m ı ndan çeşitler ve özellikle su stresleri aras ı nda istatistiki farkl ı l ı klar belirlenmiştir. Kalite özelliklerine ilişkin en yüksek değerler genellikle bitkilerin tüm geli şme dönemlerinde stressiz oldu ğ u uygulamalar ile tane dolumu döneminde stresli oldu ğ u uygulamalarda elde edilmiştir. En düşük değerler ise, bitkilerin tüm gelişme dönemlerinde stresli oldu ğ u uygulamalarda elde edilmiştir. Kalite özelliklerinin tümünde çeşitler aras ı nda istatistiki farkl ı l ı k gözlenmiş olup, özelliklere ilişkin en yüksek değ erler genellikle Bezostaja 1 çeşidinde elde edilmiştir.

1993-1995 y ı lları aras ı nda Ankara Üniversitesi Ziraat Fakültesi Kenan Evren Ara şt ı rma ve Uygulama Çiftliğ i'nde yürütülen bu ara şt ı rmada, makarnal ı k buğday ı n farkl ı gelişme dönemlerindeki su stresinin verim ve verim öğelerine etkisi incelenmi ştir. Kunduru 1149, K ı z ı ltan 91 ve Çakmak 79 makarnal ı k buğ day çeşitlerinin kullan ı ld ığı çal ışmada, sulama uygulamalar ı bitkilerin tüm gelişme dönemlerinde stressiz S1 , başaklanma döneminde stresli S2 , sapa kalkma döneminde stresli S3 ve tüm geli şme dönemlerinde stresli S4 olmak üzere yap ı lm ışt ı r. Araştı rma sonuçları na göre; incelenen özellikler yönünden özellikle su stresleri aras ı nda istatistiki farkl ı l ı klar belirlenmi ştir. Verim ve verim ö ğ elerine ilişkin en yüksek değerler, bitkilerin tüm geli şme dönemlerinde stressiz oldu ğu uygulamalarda elde edilmiştir. En düşük değ erler ise, bitkilerin tüm geli şme dönemlerinde stresli oldu ğ u uygulamalarda elde edilmi ştir. Araşt ı rmada kullan ı lan çeşitler incelenen özellikler yönünden her iki yeti ştirme y ı l ı nda farkl ı performans göstermişlerdir. Bununla birlikte ele al ı nan özelliklerin ikinci y ı l verileri, birinci y ı l verilerine göre genellikle daha yüksek bulunmu ştur

The present study was conducted to investigate the effects of guano (organic fertilizer) on germination and growth parameters of wheat (Triticum durum L. Karakılcık). Guano was applied into germination medium at a rate of 6g /100 ml - for 3 days. Following the germination of seeds, one group was water stressed by applying a water deficit for 7 days and the other group was irrigated ordinarily. The germination rate and the dry weights of germinated seeds were higher in guano-applied group. In vegetative stage, guano treatments improved relative water content (RWC) and relative growth rate (RGR) under water stress. Water stress increased malondialdehyde (MDA) and hydrogen peroxide (H202) content but both parameters did not significantly change in combined water stress and guano treatments. At the seedling stage, ABA (abscisic acid) content decreased in guano group and under water stress but guano treatment increased ABA contents under water stress. It was concluded herein that guano treatments improved germination and growth parameters of wheat seeds and protected the wheat seedlings from oxidative damages under water stress. [ABSTRACT FROM AUTHOR]

The effects of different irrigation levels on yield, quality parameters, e vapotranspiration, water use efficiency, and irrigation water use efficiency were investigated for pepper (Capsicum Annum Cv. Kapija) plant grown in semi -arid region. The Research was carried out in 2009-2010 years in Canakkale province. Drip irrigation method was applied to irrigate the experimental plots with 4 different irrigation levels (I0, I66, I33 and I100). Total irrigation water amounts ranged from 30 to 567 mm in 2009 and from 62 to 489 mm in 2010 were applied according the treatments. Average seasonal evapotranspiration (ETa) were calculated between 322-796 mm with respect to treatments. Pepper yield were obtained 10.89-44.92 and 4.47-63.64 t ha-1in 2009 and 2010, respectively. With respect to irrigation levels, average water use efficiency (WUE) , irrigation water use efficiency (IWUE) were changed between 2.36-6.95 kg m-3 and 0-9.05 kg m-3, respectively. Average yield response factor (ky) was found 1.468. While considering the both 2009 and 2010 years, differences between quality parameters of irrigation treatments (mean fruit weight, fruit width , fruit lenght, fruit thickness and water soluable dry matter) except pH, were statistically significant (p<0.05). [ABSTRACT FROM AUTHOR]

The objective of this study was to determine plant water stress using Chlorophyll Readings (ChRs) and Leaf Water Content (LWC) measurements for watermelon in the Canakkale region of western Turkey. ChRs and LWC were measured before (BI) and after irrigation (AI). Six different irrigation treatments (S100, (control), S80, S60 S40, S20 and S0 (non-irrigated)) were applied with drip irrigation. Growth stages were divided into three categories: (1) flowering (F), (2) fruit growth (FG) and (3) ripening and harvest (RH). ChRs and LWC for both irrigation treatments and all growing stages were calculated by means of ANOVA using SPSS for Windows statistical software. It was seen that ChRs and LWC decreased from S100 to S0 during growth period. The coefficient of determination (R2) and linear equation between ChRs and LWC for F, FG and RH stages were found to be 0.751, 0.805 and 0.878, respectively. Result of this study has shown that LWC and ChRs measurements can be used to determine water stress especially F period and the beginning FG periods. [ABSTRACT FROM AUTHOR]

Bu çalışmada, toprağa karıştırılan peat ve perlitin, su stresi altındaki biber bitkisinin (Capsicum annuum var grossum cv 11 B-14) gelişimi üzerine etkileri araştırılmıştır Sera koşullarında iki yıl yürütülen çalışmada, toprağa değişik oranlarda karıştırılmış peat ve perlit fide dikiminin onuncu gününde, çiçeklenme ve meyve oluşumu dönemlerinde su stresine bırakılan biber bitkilerinin bazı bitki gelişim parametreler üzerine olan etkileri belirlenmiştir. Toprağa karıştırılan peat ve perlit bitki gelişiminde toprak ortamına göre daha olumlu etkiler yapmış, özellikle peat bitki gelişiminde perlit materyaline göre daha etkili bir ortam sağlamıştır. Biber bitkisine belirli gelişme dönemlerinde su stresi uygulanması İle bitki gelişiminde su stresinin uygulanma dönemine bağlı olarak farklılıklar meydana geldiği, bitkinin fide dönemindeki su stresine karşı oldukça duyarlılık gösterdiği, ancak çiçeklenme ve meyve oluşumu dönemlerinde daha toleranslı davrandığı belirlenmiştir.