Stomatal CO2 responses at sub- and above-ambient CO2 levels employ different pathways in Arabidopsis.

ABSTRACT: Stomatal pores that control plant CO2 uptake and water loss affect global carbon and water cycles. In the era of increasing atmospheric CO2 levels and vapor pressure deficit (VPD), it is essential to understand how these stimuli affect stomatal behavior. Whether stomatal responses to sub-ambient and above-ambient CO2 levels are governed by the same regulators and depend on VPD remains unknown. We studied stomatal conductance responses in Arabidopsis (Arabidopsis thaliana) stomatal signaling mutants under conditions where CO2 levels were either increased from sub-ambient to ambient (400 ppm) or from ambient to above-ambient levels under normal or elevated VPD. We found that guard cell signaling components involved in CO2-induced stomatal closure have different roles in the sub-ambient and a

SUBMITTER: Koolmeister K 

PROVIDER: S-EPMC11376393 | biostudies-literature | 2024 Sep

REPOSITORIES: biostudies-literature