نوع مقاله : مقاله پژوهشی
1 دانشجوی دکتری پژوهشکدۀ ملی انگور و کشمش دانشگاه ملایر
2 استادیار، گروه فضای سبز، دانشکدۀ کشاورزی دانشگاه ملایر
3 استاد، گروه باغبانی، دانشکدۀ کشاورزی دانشگاه بوعلی، همدان
4 استادیار، گروه زیستشناسی، دانشکدۀ علوم دانشگاه ملایر
عنوان مقاله [English]
Drought stress is one of the major limits of agricultural production in the world as well as Iran. Knowledge of the mechanism of action in different varieties and genotypes of grape in drought stress can help farmers in the selection of suitable varieties for cultivation and researchers to determine the candidate genotypes for breeding programs. For this purpose, research by factorial arrangement in completely randomized design (CRD) with three replications in greenhouse conditions in 2015-2016 were carried out to study the effect of soil water potential changes in some physiological and morphological traits of four varieties of domestic and foreign grapes. The treatments includes four varieties of grapes (Askari, Khalili, Chafteh and Perlette) and three levels of drought stress (-0.2, -0.7 and -1.2 M Pa). In this experiment effect of water potential changes in some physiological and morphological traits of four varieties of domestic and foreign grapes were studied. Measured traits were LMA (Leaf Mass Area), cell membrane stability index, chlorophyll, proline, total protein, soluble carbohydrates, RWC (Relative Water Content), malondialdehyde levels, activity of catalase (CAT) and peroxidase (POX). Base on the results of this study, all drought stress levels and varieties have significant effect on measured traits at 1% level. By increasing drought stress, proline (21- 38%), MDA (50-70%), soluble carbohydrates (55%), activity of CAT (37-54%), and POX (13-17%) increased, but RWC (5.6%) and total soluble protein (19-39%) decreased. In general, the results showed that the varieties of Chafteh and Khalili have the higher potential to tolerate drought stress conditions compared with Askari and Perlette.