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Copyright of Xinjiang Agricultural Sciences is the property of Xinjiang Agricultural Sciences Editorial Department 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.)

【Objective】The SQUAMOSA promoter binding protein like（SPL）transcription factor is a crucial regulatory element in the induction of plant flowering. This study aims to identify the members of the SPL（JrSPL）gene family within the walnut genome and analyze their expression characteristics. The findings of this study will serve as a valuable reference for further investigations into the functional aspects of SPL in walnut flowering induction.【Method】The present study employed bioinformatics techniques to identify members of the JrSPL gene family, subsequently to predict their fundamental physicochemical properties, conserved domains, evolutionary relationships, and cis acting elements of promoters. Additionally, transcriptome sequencing and RT-qPCR technology were employed to investigate the expressions of JrSPL family members in various tissues of walnut, as well as following grafting-induced flowering.【Result】The JrSPL family consisted of 28 members, showing significant conservation in their gene and protein structures, which were dispersed across 14 distinct chromosomes within the walnut genome. Notably, there were 17 collinear relationships with Arabidopsis and 24 with Populus tomentosa, respectively. Through phylogenetic analysis, these members were categorized into 8 distinct groups. Additionally, the JrSPL promoter region encompassed a substantial quantity of light responsive elements, hormone responsive elements, stress responsive elements, and other similar regulatory motifs. The transcriptome analysis revealed that the JrSPL genes demonstrated varying expressions across different tissues of walnut, including male flowers, female flowers, apical buds, and leaves. Notably, the expressions of most genes were relatively high in female flowers, with 6 genes having significant expression, suggesting their potential involvement in the induction of flowering. In the context of grafting-induced walnut flowering materials, with the except of JrSPL8, the expressions of 12 JrSPLs observed in the flowering materials were found to be greater than those in the control group. Specifically, JrSPL2 and JrSPL25 showed significant expressions in the male flowers of mixed inflorescences, whereas JrSPL8 had high expression in the apical buds.【Conclusion】The JrSPL gene exerts a significant influence on the process of walnut flowering, with its high expression serving as the primary determinant of early flowering. [ABSTRACT FROM AUTHOR]

Copyright of Arid Zone Research / Ganhanqu Yanjiu is the property of Arid Zone Research Editorial Office 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.)

Liangshan Prefecture is one of the three major forest areas in Sichuan Province and one of the three major disaster areas of forest fire. We measured the physicochemical properties and combustion performances of different organs (leaves and branches) of 15 main economic tree species in Liangshan, and analyzed the bioecology characteristics, silviculture characteristics and value characteristics of different tree species. We investigated the fire resistance of different tree species to screen out fire-resistant species suitable for economic forest development in Liangshan Prefecture, and improve the biological fire prevention ability. The seven physicochemical properties and combustion performances indices of 15 tree species showed significant differences. Except for crude ash and lignin, the weights of moisture content, caloric value, ignition point, crude fat, and crude fibre of leaves were higher than those of branches. Crude fibre index of leaves (9.6%) and the crude ash index of branches (9.9%) were the highest weight indices of the two organs, respectively. Based on the fire resistance, we divided all the species into three classes, i.e., class I (excellent fire-resistance trees) Juglans regia and Morus alba; class II (better fire-resistant trees) Sapium sebiferum, Mangifera indica, Phyllanthus emblica, Eriobotrya japonica, Ligustrum lucidum, Castanea mollissima, and Punica granatum; class III (poor fire-resistant trees) Pinus armandii, Illicium simonsii, Morella rubra, Sapindus mukorossi, Olea europaea and Camellia oleifera. J. regia and M. alba had fireproof solid performance and could be used as the preferred species for fireproof economic forest in Liangshan region. It was suggested that to use class I to II fire-resistant tree species built the main fireproof isolated forest belt, and pay attention to fire prevention after planting class III tree species in a large area. [ABSTRACT FROM AUTHOR]

Copyright of Chinese Journal of Applied Ecology / Yingyong Shengtai Xuebao is the property of Chinese Journal of Applied Ecology 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 Acta Agriculturae Zhejiangensis is the property of Acta Agriculturae Zhejiangensis Editorial Office 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.)

To screen DNA barcodes suitable for the identification of walnut cultivars and related species that were not easily distinguished by morphology, so as to provide a new way for accurate identification of walnut cultivars and ensure the healthy development of walnut industry, 11 walnut cultivars and 5 relatives were used as test materials, DNA barcodes with high amplification efficiency and abundant variation sites among cultivars were selected by amplification, sequencing and sequence variation analysis in three chloroplast genes (rbcL, psbA-trnH, matK) and one nuclear DNA sequence (ITS1). The results showed that, the success rates of amplification and sequencing of the four candidate DNA barcodes in 16 species (cultivars) were 100%. The rbcL sequences showed minimal differences among species (cultivars), while the psbA -trnH sequences differed only among genera. matK and ITS1 sequences differed among species (cultivars), and their similarities were 99. 12% and 99. 88%, with 18 and 8 base site variants, respectively. Different species (cultivars) clustered differently in the phylogenetic tree constructed based on matK sequence, which verified the accuracy of using matK to identify walnut cultivars and their relatives. Thus, the combination of matK+ITS1 barcode can effectively identify walnut cultivars and their relatives. [ABSTRACT FROM AUTHOR]

Copyright of Bulletin of Botanical Research is the property of Bulletin of Botanical Research Editorial Department 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 Forest Research is the property of Forest Research Editorial Office 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 Henan Agricultural Sciences is the property of Editorial Board of Journal of Henan Agricultural Sciences 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.)

[Objective (The objective of this study is to elucidate the allopathic effects of walnut leaves aqueous extracts on 4 medicinal plants! =citis tinDoria L. ，Atractylodes macrocephal Koi(dz. ，Poly^^ala tenuifolia Willd. and Sa;— 2;—a Bge. )，and provide a theoret¬ical basis for the intercropping between the Chinese herbs and forest. ' Method】 By using bio-assay method ， the allopathic effects of walnut (Juglans repif L. . leaves aqueous extracts were investigated on the seed germination， seedling growth and fresh weight of 4 medicinal plants. ' Result】 The results showed that the aqueous extracts of walnut leaves existed different allopathic cffects on different test medicinal plants. All aqueous extracts significantly inhibited the germination capacity of = tincDria. ，but for A. macrocephala，there existed inhibito¬ry/ stimulatory effects on the germination rate，and P. Willd. had good adaptability during the seed germination process under the aqueous extracts of walnut leaves. The root length were more sensitive than shoot length to the water-soluble allelochemicals of walnut leaf aqueous ex- tracts，the inhibitory effect of root lengtli of S. miltiorrhiza. was more enhanced with the concentrations increasing of walnut leaves aqueous extracts. 'Conclusion】The studies suggested that there existed different effects with concentration of walnut leaf extracts and receptor plant species，so allelopathic effects exhibited different selectivity and specificity. We preliminarily suggest tliat Polygala tenuifolid Will(d could be used as a suitable medicinal material for walnut intercropping [ABSTRACT FROM AUTHOR]

Copyright of Forest Research is the property of Forest Research Editorial Office 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 Forest Research is the property of Forest Research Editorial Office 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.)

[Objective] To provide a reference for selective improved varieties of local plants, the qualities of 81 seedling individuals of Juglans regia from 11 counties in Guangxi Hechi and Baise regions were analyzed. [Method] Fruit characters and nutritional components of different Juglans regia seedling individuals were determined and correlation among the 11 quality characters were analyzed. On this basis, combined with principal component analysis result, qualities of 81 individuals tested were comprehensively evaluated. [Result]The coefficient of variation of 11 quality characters among different Juglans regia seedling individuals were 3.94 % -22.77 %. The variation coefficients of fruit weight, shell thickness, oleic acid content, stearic acid content and palmitic acid content were more than 10 %. The No. 8 had the highest fruit weight (17.40 %), No.75 had the lowest shell thickness (0. 80 mm), No. 53 had the highest oleic acid content (37.80 %), No. 25 had the lowest stearic acid content and No. 65 had the lowest palmitic acid content. 10 superior individuals were screened synthetically by principal component analysis. Among them, No. 25,65,72,53,80,79 and 58 were characterized by high unsaturated fatty acid content and low saturated fatty acid content. No. 24 had higher fruit three-diameter, as well as weight and fat content. No. 21 had higher fruit weight, kernel rate, fat and protein content. [Conclusion] 10 individuals with the best comprehensive characteristics can be used in the grafting propagation and variety breeding. 8 individuals with the best single characteristics can be used in the studies on genetic improvement. [ABSTRACT FROM AUTHOR]

Liangshan Prefecture is one of the three major forest areas in Sichuan Province and one of the three major disaster areas of forest fire. We measured the physicochemical properties and combustion performances of different organs (leaves and branches) of 15 main economic tree species in Liangshan, and analyzed the bioecology characteristics, silviculture characteristics and value characteristics of different tree species. We investigated the fire resistance of different tree species to screen out fire-resistant species suitable for economic forest development in Liangshan Prefecture, and improve the biological fire prevention ability. The seven physicochemical properties and combustion performances indices of 15 tree species showed significant differences. Except for crude ash and lignin, the weights of moisture content, caloric value, ignition point, crude fat, and crude fibre of leaves were higher than those of branches. Crude fibre index of leaves (9.6%) and the crude ash index of branches (9.9%) were the highest weight indices of the two organs, respectively. Based on the fire resistance, we divided all the species into three classes, i.e ., class Ⅰ (excellent fire-resistance trees) Juglans regia and Morus alba ; class Ⅱ (better fire-resistant trees) Sapium sebiferum , Mangifera indica , Phyllanthus emblica , Eriobotrya japonica , Ligustrum lucidum , Castanea mollissima , and Punica granatum ; class Ⅲ (poor fire-resistant trees) Pinus armandii , Illicium simonsii , Morella rubra , Sapindus mukorossi , Olea europaea and Camellia oleifera . J. regia and M. alba had fireproof solid performance and could be used as the preferred species for fireproof economic forest in Liangshan region. It was suggested that to use class Ⅰ to Ⅱ fire-resistant tree species built the main fireproof isolated forest belt, and pay attention to fire prevention after planting class Ⅲ tree species in a large area.

Copyright of Journal of Henan Agricultural Sciences is the property of Editorial Board of Journal of Henan Agricultural Sciences 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.)

【Objective】 The differences of chloroplast DNA among artificial interspecific hybrid walnut, Juglans sigillata × J. regia cv. ’Yunxingaoyuan’ and its parents(its female parent is Juglans sigillata cv. ’Yangpao’ and its paternal parent is J.regia cv. ’Yunlin A7’) were studied in this paper, to understand the genetic rule of walnut chloroplast DNA and to mine highly variable chloroplast DNA regions. 【Method】 The downloaded chloroplast genome sequences of J. sigillata and J.regia from NCBI database were aligned and analyzed. The primers were designed based on the different variation positions. Then the labeling regions among’ Yunxingaoyuan’ and its parents were sequenced and verified for the polymorphism. 【Result】 The results showed that there were seven SNPs and seven InDels in choroplastic genome sequences of two Juglans species, of which total size involved 30 bases. Fourteen primers were designed, and all of them were successfully amplified and sequenced among’Yunxingaoyuan’and its parents. The resulting sequences demonstrated totally 33 variable sites, of which 21(64 %) sites were the same between ’Yunxingaoyuan’ and its female parent, and 12(36 %) sites were the same between’Yunxingaoyuan’and its paternal parent. The 33 variable sites belonged to 11 genes or intergenic segments, and could be divided into 11 haplotypes, of which 10 haplotypes were identical to the female parent, and remaining 1 had the haplotypes of both parents. 【Conclusion】 According to the plastid inheritance law, the analysis evidences indicated that chloroplast inheritance in Juglans is maternal dominantly and biparental subordinately pattern. The ndhF-rpl32 fragment exist multiple variation sites, so it is excellent candidate for future phylogenetics, population genetics and variety identification studies. [ABSTRACT FROM AUTHOR]

Copyright of Bulletin of Botanical Research is the property of Bulletin of Botanical Research Editorial Department 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 order to probe the dynamic changes of enzyme activity in rhizosphere of 6-year-old Juglans regia in the loess area of northern Wei River, taken 6 -year-old walnut rhizosphere soil in the loess area of northern Wei River as research objects, the samples were collected respectively at different time ( by the end of Aпril, June, August and October of 2009) and different soil depths (0 - 20, 20 - 40, 40 - 60, 60 - 80, 80 - 100 cm ), and the catalase, urease, phosphatase and invertase activities were determined. The results showed that the activities of catalase, urease, phosphatase and sucrase around J. regia rhizosphere soil decreased with the soil deepening, and in the 0-20 cm soil layer, the activities of four enzymes were the highest. With the different sampling time, the dynamic changes of enzymatic activities showed inconsistent variations. The catalase and urease activities first increased, then decreased, and then increased; Phosphatase activity first decreased, then increased and decreased at last; Sucrase activity first decreased, and then increased. It was concluded that the spatial dynamic change of enzymes activity was related to J. regia root exudates, and the root could not reach the deeper soil layer, so the enzyme activities were decreased with the soil deepening; The dynamic changes of enzyme activities with time were different due to the enzymatic synthesis affected by the type and quantity of J. regia root exudates. [ABSTRACT FROM AUTHOR]

According to the field trials with quantitative fertilization, the spectral characteristic parameters which were highly significantly correlated with foliar potassium (K) content were screened out using Pearson correlation analysis, and the foliar K content estimation models of Juglans regia 'Wen185' in different phenological periods of fruit development were built up with these parameters as independent variables using regression analysis. The results showed that there were one or more spectral characteristic parameters which were highly significantly correlated with the foliar K contents of 'Wen185' walnut in the different phonological periods of fruit development (P＜0.01). Through cubic function analysis with normalized difference green index in the fruit setting period, ratio red and yellow edge area index in the fruit rapid-growth period, ratio green index in the fruit fat-change period and blue edge area in the fruit near-mature period as independent variable, the regression estimation models of the foliar K content in the different phenological periods of fruit development were established respectively, and their fitting degrees (R 2 ) were all above 0.95. In addition, the estimated values of the models for the foliar K content of 'Wen185' walnut were consis-tent with the measured values of the independent samples, and the root mean square errors and the relative errors of the independent sample tests were less than 0.8161 g·kg -1 and 2.7% in the diffe-rent phenological periods of fruit development. The models showed their high estimation accuracy. The spectrum technology possessed great application potential in monitoring K status of J. regia.