Soil Rather Than Xylem Vulnerability Controls Stomatal Response to Drought

编号 040026004

推送时间 20201012

研究领域 森林培育 

年份 2020 

类型 期刊 

语种 英语

标题 Soil Rather Than Xylem Vulnerability Controls Stomatal Response to Drought

来源期刊 Trends in Plant Science

期 第260期

发表时间 20200901

关键词 soil;  stomatal regulation;  water availability;  hydraulics; 

摘要 The current trend towards linking stomata regulation to plant hydraulics emphasizes the role of xylem vulnerability. Using a soil–plant hydraulic model, we show that xylem vulnerability does not trigger stomatal closure in medium-wet to dry soils and we propose that soil hydraulic conductivity loss is the primary driver of stomatal closure. This finding has two key implications: transpiration response to drought cannot be derived from plant traits only and is related to soil–root hydraulics in a predictable way; roots and their interface with the soil, the rhizosphere, are key hydraulic regions that plants can alter to efficiently adapt to water limitations. We conclude that connecting below- and aboveground hydraulics is necessary to fully comprehend plant responses to drought.

服务人员 孙小满

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