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ABA-mediated modulation of elevated CO2 on stomatal response to drought
Shenglan Li1, Xiangnan Li2, Zhenhua Wei3
1Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Højbakkegaard Allé 13, DK-2630, Taastrup, Denmark.
Current Opinion in Plant Biology
|January 16, 2020
Summary
Elevated atmospheric CO2 may hinder plants' drought defense by delaying stomatal closure, impacting crop yield. Abscisic acid (ABA) role in this process under elevated CO2 needs further study.
Area of Science:
- Plant Physiology
- Environmental Science
- Agricultural Science
Background:
- Elevated atmospheric CO2 (eCO2) affects plant water relations and growth.
- Drought stress significantly impacts crop yield and plant survival.
- Stomatal response to drought is a critical mechanism for plant water conservation.
Purpose of the Study:
- To review current knowledge on stomatal responses to drought under eCO2.
- To discuss the role of abscisic acid (ABA) in mediating these responses.
- To understand how eCO2 might alter plant drought adaptation.
Main Methods:
- Literature review of existing research on stomatal physiology.
- Analysis of studies investigating plant responses to drought and eCO2.
- Synthesis of findings on ABA signaling in stomatal regulation.
Main Results:
- eCO2 can alleviate drought stress, potentially increasing crop yield.
- eCO2 may disrupt the ABA-mediated drought response by delaying stomatal closure.
- This disruption could impair the plant's first line of defense against water deficit.
Conclusions:
- Understanding stomatal and ABA responses to eCO2 and drought is crucial for predicting crop performance.
- Further research is needed to elucidate the precise mechanisms by which eCO2 affects ABA signaling.
- This knowledge can inform strategies for enhancing crop resilience in a changing climate.
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