1. Agave REVEILLE1 regulates the onset and release of seasonal dormancy in Populus
- Author
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Degao Liu, Dan Tang, Meng Xie, Jin Zhang, Longmei Zhai, Jiangping Mao, Chao Luo, Anna Lipzen, Yu Zhang, Emily Savage, Guoliang Yuan, Hao-Bo Guo, Dimiru Tadesse, Rongbin Hu, Sara Jawdy, Hua Cheng, Linling Li, Huseyin Yer, Miranda M Clark, Huayu Sun, Jiyuan Shi, Roshani Budhathoki, Rahul Kumar, Troy Kamuda, Yanjun Li, Christa Pennacchio, Kerrie Barry, Jeremy Schmutz, Rajiv Berry, Wellington Muchero, Jin-Gui Chen, Yi Li, Gerald A Tuskan, and Xiaohan Yang
- Subjects
Physiology ,Genetics ,Plant Science - Abstract
Deciduous woody plants like poplar (Populus spp.) have seasonal bud dormancy. It has been challenging to simultaneously delay the onset of bud dormancy in the fall and advance bud break in the spring, as bud dormancy, and bud break were thought to be controlled by different genetic factors. Here, we demonstrate that heterologous expression of the REVEILLE1 gene (named AaRVE1) from Agave (Agave americana) not only delays the onset of bud dormancy but also accelerates bud break in poplar in field trials. AaRVE1 heterologous expression increases poplar biomass yield by 166% in the greenhouse. Furthermore, we reveal that heterologous expression of AaRVE1 increases cytokinin contents, represses multiple dormancy-related genes, and up-regulates bud break-related genes, and that AaRVE1 functions as a transcriptional repressor and regulates the activity of the DORMANCY-ASSOCIATED PROTEIN 1 (DRM1) promoter. Our findings demonstrate that AaRVE1 appears to function as a regulator of bud dormancy and bud break, which has important implications for extending the growing season of deciduous trees in frost-free temperate and subtropical regions to increase crop yield.
- Published
- 2022
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