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The objective of this study was to investigate the distribution of volatile organic compounds (VOCs) in the peel and flesh of the cucumber (Cucumis sativus L.) cultivar 'Cengelkoy' grafted onto different bottle gourd rootstocks, as VOCs play an essential role in fruit quality. Three genotypes of bottle gourd (Lagenaria siceraria; '33-35', '33-41' and '46-03') were chosen as being representative of Turkish bottle gourd germplasm. The VOCs in each rootstock-scion combination were analysed using carboxen-divinylbenzene-polydimethylsiloxane fibres for solid-phase micro-extraction (SPME) and gas chromatography-mass spectrometry (GC-MS). The VOCs (Z)-6-nonenol (21.4 - 28.6%), (E,Z)-2,6-nonadienol (3.2 - 13.0%), (E,Z)-3,6-nonadienol (1.9 - 7.1%), 1-nonanol (4.9 - 7.2%), (E)-2-nonenal (3.9 - 6.6%), (E,Z)-2,4-heptadienal (5.7 - 6.9%), (Z)-6-nonenal (3.6 - 5.4%), (E)-2-hexenal (0.9 - 4.4%), (E,E)-3,5-octadien-2-one (3.2 - 3.5%), and hexanal (1.9 - 3.6%) were the most abundant compounds found in cucumber peel. Grafting had a significant (P, The objective of this study was to investigate the distribution of volatile organic compounds (VOCs) in the peel and flesh of the cucumber (Cucumis sativus L.) cultivar ‘Çengelköy’ grafted onto different bottle gourd rootstocks, as VOCs play an essential role in fruit quality. Three genotypes of bottle gourd (Lagenaria siceraria; ‘33-35’, ‘33-41’ and ‘46-03’) were chosen as being representative of Turkish bottle gourd germplasm. The VOCs in each rootstock-scion combination were analysed using carboxen-divinylbenzene-polydimethylsiloxane fibres for solid-phase microextraction(SPME) and gas chromatography-mass spectrometry (GC-MS). The VOCs (Z)-6-nonenol (21.4 – 28.6%), (E,Z)-2,6-nonadienol (3.2 – 13.0%), (E,Z)-3,6-nonadienol (1.9 – 7.1%), 1-nonanol (4.9 – 7.2%), (E)-2-nonenal (3.9 –6.6%), (E,Z)-2,4-heptadienal (5.7 – 6.9%), (Z)-6-nonenal (3.6 – 5.4%), (E)-2-hexenal (0.9 – 4.4%), (E,E)-3,5-octadien- 2-one (3.2 – 3.5%), and hexanal (1.9 – 3.6%) were the most abundant compounds found in cucumber peel. Graftinghad a significant (P ? 0.05) effect on the percentage composition of the major VOCs in peel. (E,Z)-2,6-Nonadienal (34.3 – 41.5%), (E)-2-nonenal (15.5 – 19.9%), (Z)-6-nonenal (5.9 - 8.0%), (Z,Z)-3,6-nonadienol (2.6 – 8.4%), (Z)-6- nonenol (2.7 – 7.9%), 3-decyne (2.1 – 3.4%), and (E,Z)-2,6-nonadienol (1.9 – 5.7%) were the most significant volatilesin cucumber flesh. Of these compounds, (E,Z)-2,4-heptadienal, (E,E)-3,5-octadien-2-one, and 3-decyne were identified as cucumber VOCs for the first time. The results showed that the percentage composition of VOCs in the peel and flesh of cucumbers grafted onto bottle gourd ‘33-41’ were closest to those in ungrafted control cucumber,‘Çengelköy’.Therefore,Turkish bottle gourd genotype ‘33-41’ has high potential as a rootstock for cucumer grafting

The watermelon cultivar ‘Crimson Tide’ was grafted onto three different rootstocks and grown under saline conditions to investigate effects of salinity on grafted and non-grafted watermelon. One Cucurbita maxima and 2 Lagenarai siceraria landraces (Skp and Brecik) were used as rootstock. Plants were irrigated with two different saline solutions [0.5 (control) and 8.0 dS m−1] by two days interval at the first 15 days of experiment and one day interval at the last 15 days of experiment. The experimental design was randomized block. Each treatment was replicated three times with three plants. Grafted plants had higher plant growth parameter than non-grafted plant under saline conditions. Reduction in shoot dry weight was 41% in non-grafted plants while it was varied from 22% to 0.8% in grafted plants under saline conditions. Accumulation of sodium (Na+) was higher in non-grafted plants than grafted one. Calcium (Ca++) and magnesium (Mg++) concentration were higher in all grafted plants than non-grafted plant...

The uptake of phosphorous (P) and nitrogen (N) and some growth parameters of watermelon [Citrullus lanatus (Thunb.) Matsum and Nakai] cultivar 'Crimson Tide', grafted on gourd rootstock (Lagenaria siceraria) landraces and Cucurbita maxima, grown under five different saline conditions for 30 days were investigated. Salinity stress was induced by continuous irrigation with saline water having electrical conductivity (EC) of 0.5, 4, 8, 12, and 16 dS/m. Grafted watermelons showed better growth performance than non-grafted ones. Nutrient uptake was significantly affected by rootstocks and salinity levels. Salinity stress has resulted in an increase in P content of shoots as much as two fold. Total N uptake by shoots of both non-grafted and grafted watermelon on gourds gradually decreased above 8 dS/m salinity. This investigation showed that grafted plants had a better performance than the non-grafted watermelon cultivar. Therefore, gourds, especially those of Lagenaria type, may be used as a rootstock for watermelon under saline conditions.