Stomatal closure: the old guard takes up the SLAC
1Department of Molecular Biology and Biotechnology, University of Sheffield, Firth Court, Western Bank, Sheffield, S10 2TN, UK.
Current Biology : CB
|April 2, 2015
Summary
Flowering plants use anion channels to control stomatal closure. Mosses likely share this mechanism, suggesting an ancient origin for active stomatal regulation via SLAC channels.
Area of Science:
- Plant Physiology
- Molecular Biology
- Evolutionary Biology
Background:
- Stomatal closure in flowering plants is regulated by passive dehydration or active anion transport.
- SLAC (Slow Anion Channel) is a key phospho-activated membrane channel involved in active stomatal control.
Purpose of the Study:
- To investigate whether mosses utilize similar mechanisms for stomatal closure as flowering plants.
- To explore the evolutionary origins of SLAC-mediated active stomatal control.
Main Methods:
- Comparative analysis of stomatal regulation mechanisms in mosses and flowering plants.
- Investigating the potential role of SLAC or analogous channels in moss stomatal function.
Main Results:
- Evidence suggests that mosses likely employ active anion pumping for stomatal closure.
- This mechanism appears to be conserved and potentially ancient.
Conclusions:
- Mosses likely utilize SLAC-mediated active stomatal control, similar to flowering plants.
- This finding supports an early evolutionary origin for active stomatal regulation mechanisms.
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