KIN10 promotes stomatal development through stabilization of the SPEECHLESS transcription factor

Chao Han, Yue Liu, Wen Shi, Yan Qiao, Lingyan Wang, Yanchen Tian, Min Fan, Zhiping Deng, On Sun Lau, Geert De Jaeger and Ming-Yi Bai ()
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Chao Han: Shandong University
Yue Liu: Shandong University
Wen Shi: Shandong University
Yan Qiao: Shandong University
Lingyan Wang: Shandong University
Yanchen Tian: Shandong University
Min Fan: Shandong University
Zhiping Deng: Zhejiang Academy of Agricultural Sciences
On Sun Lau: National University of Singapore
Geert De Jaeger: Ghent University
Ming-Yi Bai: Shandong University

Nature Communications, 2020, vol. 11, issue 1, 1-10

Abstract: Abstract Stomata are epidermal structures that modulate gas exchanges between plants and the atmosphere. The formation of stomata is regulated by multiple developmental and environmental signals, but how these signals are coordinated to control this process remains unclear. Here, we showed that the conserved energy sensor kinase SnRK1 promotes stomatal development under short-day photoperiod or in liquid culture conditions. Mutation of KIN10, the catalytic α-subunit of SnRK1, results in the decreased stomatal index; while overexpression of KIN10 significantly induces stomatal development. KIN10 displays the cell-type-specific subcellular location pattern. The nuclear-localized KIN10 proteins are highly enriched in the stomatal lineage cells to phosphorylate and stabilize SPEECHLESS, a master regulator of stomatal formation, thereby promoting stomatal development. Our work identifies a module links connecting the energy signaling and stomatal development and reveals that multiple regulatory mechanisms are in place for SnRK1 to modulate stomatal development in response to changing environments.

Date: 2020
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DOI: 10.1038/s41467-020-18048-w

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