Water Deficit Modulates the CO₂ Fertilization Effect on Plant Gas Exchange and Leaf-Level Water Use Efficiency: A Meta-Analysis.

ABSTRACT: Elevated atmospheric CO₂ concentrations ([eCO₂]) and soil water deficits significantly influence gas exchange in plant leaves, affecting the carbon-water cycle in terrestrial ecosystems. However, it remains unclear how the soil water deficit modulates the plant CO₂ fertilization effect, especially for gas exchange and leaf-level water use efficiency (WUE). Here, we synthesized a comprehensive dataset including 554 observations from 54 individual studies and quantified the responses for leaf gas exchange induced by e[CO₂] under water deficit. Moreover, we investigated the contribution of plant net photosynthesis rate (P _n ) and transpiration rates (T _r) toward WUE in water deficit conditions and e[CO

SUBMITTER: Li F 

PROVIDER: S-EPMC8667667 | biostudies-literature | 2021

REPOSITORIES: biostudies-literature