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Title: Agave REVEILLE1 regulates the onset and release of seasonal dormancy in Populus

Journal Article · · Plant Physiology (Bethesda)
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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.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Biological and Environmental Research (BER)
Grant/Contract Number:
SC0008834; AC05-00OR22725; AC02-05CH11231; SC0012704
OSTI ID:
1962191
Alternate ID(s):
OSTI ID: 1913813; OSTI ID: 1914350; OSTI ID: 1923221; OSTI ID: 1975071
Report Number(s):
BNL-223866-2023-JAAM
Journal Information:
Plant Physiology (Bethesda), Journal Name: Plant Physiology (Bethesda) Vol. 191 Journal Issue: 3; ISSN 0032-0889
Publisher:
Oxford University PressCopyright Statement
Country of Publication:
United States
Language:
English

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