Trehalose-6-phosphate signaling regulates thermoresponsive hypocotyl growth in Arabidopsis thaliana
- Authors
- Hwang, Geonhee; Kim, Sara; Cho, Jae-Yong; Paik, Inyup; Kim, Jeong-Il; Oh, Eunkyoo
- Issue Date
- 4-10월-2019
- Publisher
- WILEY
- Keywords
- Arabidopsis; PIF4; thermomorphogenesis; TPS1; trehalose-6-phosphate
- Citation
- EMBO REPORTS, v.20, no.10
- Indexed
- SCIE
SCOPUS
- Journal Title
- EMBO REPORTS
- Volume
- 20
- Number
- 10
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/131375
- DOI
- 10.15252/embr.201947828
- ISSN
- 1469-221X
- Abstract
- Growth plasticity is a key mechanism by which plants adapt to the ever-changing environmental conditions. Since growth is a high-energy-demanding and irreversible process, it is expected to be regulated by the integration of endogenous energy status as well as environmental conditions. Here, we show that trehalose-6-phosphate (T6P) functions as a sugar signaling molecule that coordinates thermoresponsive hypocotyl growth with endogenous sugar availability. We found that the loss of T6P SYNTHASE 1 (TPS1) in Arabidopsis thaliana impaired high-temperature-mediated hypocotyl growth. Consistently, the activity of PIF4, a transcription factor that positively regulates hypocotyl growth, was compromised in the tps1 mutant. We further show that, in the tps1 mutant, a sugar signaling kinase KIN10 directly phosphorylates and destabilizes PIF4. T6P inhibits KIN10 activity in a GRIK-dependent manner, allowing PIF4 to promote hypocotyl growth at high temperatures. Together, our results demonstrate that T6P determines thermoresponsive growth through the KIN10-PIF4 signaling module. Such regulation of PIF4 by T6P integrates the temperature-signaling pathway with the endogenous sugar status, thus optimizing plant growth response to environmental stresses.
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Collections - Graduate School > Department of Life Sciences > 1. Journal Articles
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