Drought stress triggers alterations of adaxial and abaxial stomatal development in basil leaves increasing water-use efficiency  

作　　者：Elisa Driesen Maurice De Proft Wouter Saeys 

机构地区：[1]Department of Biosystems,KU Leuven,Willem De Croylaan 42,3001 Leuven,Belgium

出　　处：《Horticulture Research》2023年第6期96-109,共14页园艺研究（英文）

基　　金：This research was funded by Flanders Innovation&Entrepreneurship(Belgium)through project number HBC.2018.2070.

摘　　要：The physiological control of stomatal opening by which plants adjust for water availability has been extensively researched.However,the impact of water availability on stomatal development has not received as much attention,especially for amphistomatic plants.Therefore,the acclimation of stomatal development in basil(Ocimum basilicum L.)leaves was investigated.Our results show that leaves developed under water-deficit conditions possess higher stomatal densities and decreased stomatal length for both the adaxial and abaxial leaf sides.Although the stomatal developmental reaction to water deficit was similar for the two leaf surfaces,it was proven that adaxial stomata are more sensitive to water stress than abaxial stomata,with more closed adaxial stomata under water-deficit conditions.Furthermore,plants with leaves containing smaller stomata at higher densities possessed a higher water use efficiency.Our findings highlight the importance of stomatal development as a tool for long-term acclimation to limit water loss,with minimal reduction in biomass production.This highlights the central role that stomata play in both the short(opening)and long-term(development)reaction of plants to water availability,making them key tools for efficient resource use and anticipation of future environmental changes.

关 键 词：stress STOMATAL LIMIT 

分 类 号：S573[农业科学—作物学] Q94[生物学—植物学]