Document Type : Full Paper
Authors
1
Ph.D. student of Grape and Raisin Research Institute, Malayer University, Malayer, Malayer, Iran
2
Department of Horticultural Sciences Engineering, Faculty of Agriculture and Natural Resources, Imam Khomeini International University, Qazvin, Iran
3
University College of Omran-Toseeh, Hamedan, Iran
4
Assistant professor of agricultural and horticultural department, Center for Agricultural Research, Education and Natural Resources of Arak Province, Agricultural Research, Education and Extension Organization, Arak, Iran
Abstract
This research was conducted during 2018-2021 in vineyard conditions in the form of a split-plot experiment based on a randomized complete block (RCBD) with 3 replications to investigate the effect of soil water potential variability on the morphological, physiological, and biochemical traits of drought-tolerant to drought-sensitive grape varieties.The treatments include seven selected grape cultivars (‘Bidaneh Ghermez’, ‘Bidaneh Sefid’, ‘Rashe’, ‘Sahani’, ‘Kare Royeh”, ‘Moulai’, and ‘Chafte’) as the rootstock and ‘Bidaneh Ghermez’ cultivar as scion and three the drought stress level included FC (control), 75% (moderate stress) and 55% (severe stress) of agricultural moisture depletion. In this research the traits including leaf number, branch length, leaf area, wet and dry leaf weight, stomatal density electrolyte leakage, cell membrane stability,RWC, chlorophyll, carotenoid, proline, soluble carbohydrate, malondialdehyde and catalase were investigated. The results showed that the interaction effect of drought stress and variety on leaf surface traits, RWC, soluble carbohydrates, proline, total chlorophyll, carotenoids, catalase and malondialdehyde were significant at the level of 1%. Also, the simple effects of drought stress on the traits of leaf number, branch length, leaf fresh weight, stomatal density, electrolyte leakage and cell membrane stability were significant. Means comparison showed that with more severe water stress, the amount of proline and catalase increased and the amount of total chlorophyll and cell membrane stability decreased. In general, ‘Bidaneh Ghermez’ cultivar grafted on the rootstocks of ‘Chafte’, ‘Moulai’ and ‘Kare Royeh” had a higher potential for tolerance to drought stress than other grafted combinations tested in most of the traits.
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