Abstract
Grapes are sensitive to early autumn and spring low temperature damage. The current study aimed to assay the effects of cold stress (+1 °C for 4, 8, and 16 h) on three grapevine cultivars (Ghiziluzum, Khalili, and Perllete). The results showed that cold stress caused significant changes in the antioxidant and biochemicals content in the studied cultivars. Furthermore, examining the chlorophyll fluorescence indices, cold stress caused a significant increase in minimal fluorescence (F0), a decrease in maximal fluorescence (Fm), and the maximum photochemical quantum yield of photosystem II (Fv/Fm) in all cultivars. Among the studied cultivars, ‘Perllete’ had the highest increase in proline content and activity of antioxidant enzymes and also had the lowest accumulation of malondialdehyde, hydrogen peroxide, electrolyte leakage, and F0, as well as less of a decrease in Fm and Fv/Fm, and had a higher tolerance to cold stress than ‘Ghiziluzum’ and ‘Khalili’. ‘Perllete’ and ‘Ghiziluzum’ showed reasonable tolerance to the low temperature stress. ‘Khalili’ was sensitive to the stress. The rapid screening of grapevine cultivars in early spring low temperatures is applicable with the assaying of some biomolecules and chlorophyll fluorescence.
Highlights
Environmental stresses such as cold, salinity and, drought are the most critical factors affecting the growth and productivity of crops
Cold stress is a direct result of low temperatures on cellular macromolecules that lead to a slowed metabolism and the loss of membranes function [3]
Considering the interaction effect of stress × cultivar (Figure 1A), cold stress significantly increased proline accumulation in all grapevine cultivars compared with control, and increasing the stress duration led to more proline accumulation in all treatments
Summary
Environmental stresses such as cold, salinity and, drought are the most critical factors affecting the growth and productivity of crops. One of the factors that limit a plant’s survival and growth is cold stress, which plays an essential role in the ecological distribution of all plants [1]. In adaptation to cold stress, living organisms, predominantly plants, develop several molecular, biochemical, and physiological mechanisms to maintain their survival [2]. Cold stress is a direct result of low temperatures on cellular macromolecules that lead to a slowed metabolism and the loss of membranes function [3]. The plasma membrane is a highly organized system that plays an essential role in the relationship between the cell and extracellular matrix. Cold stress leads to the loss of membrane health and leakage of solutes [4]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
