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Populus SVL Acts in Leaves to Modulate the Timing of Growth Cessation and Bud Set

André, Domenique and Zambrano, José Alfredo and Zhang, Bo and Lee, Keh Chien and Rühl, Mark and Marcon, Alice and Nilsson, Ove (2022). Populus SVL Acts in Leaves to Modulate the Timing of Growth Cessation and Bud Set. Frontiers in Plant Science. 13 , 823019
[Research article]

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Abstract

SHORT VEGETATIVE PHASE (SVP) is an important regulator of FLOWERING LOCUS T (FT) in the thermosensory pathway of Arabidopsis. It is a negative regulator of flowering and represses FT transcription. In poplar trees, FT2 is central for the photoperiodic control of growth cessation, which also requires the decrease of bioactive gibberellins (GAs). In angiosperm trees, genes similar to SVP, sometimes named DORMANCY-ASSOCIATED MADS-BOX genes, control temperature-mediated bud dormancy. Here we show that SVL, an SVP ortholog in aspen trees, besides its role in controlling dormancy through its expression in buds, is also contributing to the regulation of short day induced growth cessation and bud set through its expression in leaves. SVL is upregulated during short days in leaves and binds to the FT2 promoter to repress its transcription. It furthermore decreases the amount of active GAs, whose downregulation is essential for growth cessation, by repressing the transcription of GA20 oxidase. Finally, the SVL protein is more stable in colder temperatures, thus integrating the temperature signal into the response. We conclude that the molecular function of SVL in the photoperiodic pathway has been conserved between Arabidopsis and poplar trees, albeit the physiological process it controls has changed. SVL is thus both involved in regulating the photoperiod response in leaves, modulating the timing of growth cessation and bud set, and in the subsequent temperature regulation of dormancy in the buds.

Authors/Creators:André, Domenique and Zambrano, José Alfredo and Zhang, Bo and Lee, Keh Chien and Rühl, Mark and Marcon, Alice and Nilsson, Ove
Title:Populus SVL Acts in Leaves to Modulate the Timing of Growth Cessation and Bud Set
Series Name/Journal:Frontiers in Plant Science
Year of publishing :2022
Volume:13
Article number:823019
Number of Pages:12
Publisher:FRONTIERS MEDIA SA
ISSN:1664-462X
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Botany
(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Forest Science
Keywords:poplar, FLOWERING LOCUS T, phenology, dormancy, SHORT VEGETATIVE PHASE
URN:NBN:urn:nbn:se:slu:epsilon-p-116486
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-116486
Additional ID:
Type of IDID
DOI10.3389/fpls.2022.823019
Web of Science (WoS)000765103500001
ID Code:27532
Faculty:S - Faculty of Forest Sciences
Department:(S) > Dept. of Forest Genetics and Plant Physiology
Deposited By: SLUpub Connector
Deposited On:12 Apr 2022 12:25
Metadata Last Modified:12 Apr 2022 12:31

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