Grapevine Rootstocks Differently Affect Physiological and Molecular Responses of the Scion under Water Deficit Condition
نویسندگان
چکیده
Grapevine rootstocks play a pivotal role in plant responses to water deficiency (WD); therefore, the selection of new genotypes is promising strategy for future agricultural managements aimed cope with climate changes. Recent studies reinforced central root system modulating WD responses, as it not only controls uptake and transport leaves, but also participates stress perception signalling shoot. The present work evaluated performance 101.14 M4 graft combination cultivar Cabernet Sauvignon (Cab) by assessing some canonical molecular, biochemical physiological induced WD. autograft Cab/Cab was included experimental design control. Under WD, Cab/M4 showed greater capacity sustain CO2 assimilation rate (An) stomatal conductance (gs), while limiting decrease leaf potential (Ψleaf) compared other combinations. enhanced adaptability supported higher from soil, estimated measuring daily lost plants, reduced effect drought treatment on total biomass. Quantification ABA both organs revealed accumulation thus confirming lower sensitivity deficit. At molecular level, expression selected stress-responsive ABA-related genes investigated, including involved biosynthesis (VviNCED3), (VviPP2C9, VviPP2C4,VviSnRk2.6), regulation gene (VviABF2) opening (VviSIRK, VviMYB60). Results indicated tight correlation between level roots suggesting that synthesis were attenuated Cab/101.14 Cab/Cab. As whole, our data demonstrated satisfy demand scion under limited availability, delayed closure photosynthetic activity. Importantly, these adaptive traits related ABA-mediated leaves.
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ژورنال
عنوان ژورنال: Agronomy
سال: 2021
ISSN: ['2156-3276', '0065-4663']
DOI: https://doi.org/10.3390/agronomy11020289