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FLOWERING LOCUS T paralogs control the annual growth cycle in Populus trees

André, Domenique and Marcon, Alice and Lee, Keh Chien and Goretti, Daniela and Zhang, Bo and Delhomme, Nicolas and Schmid, Markus and Nilsson, Ove (2022). FLOWERING LOCUS T paralogs control the annual growth cycle in Populus trees. Current Biology. 32 :13 , 2988-2996
[Research article]

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Abstract

In temperate and boreal regions, perennials adapt their annual growth cycle to the change of seasons. These adaptations ensure survival in harsh environmental conditions, allowing growth at different latitudes and altitudes, and are therefore tightly regulated. Populus tree species cease growth and form terminal buds in autumn when photoperiod falls below a certain threshold.(1) This is followed by establishment of dormancy and cold hardiness over the winter. At the center of the photoperiodic pathway in Populus is the gene FLOWERING LOCUS T2 (FT2), which is expressed during summer and harbors significant SNPs in its locus associated with timing of bud set.(1-4) The paralogous gene FT1, on the other hand, is hyper-induced in chilling buds during winter.(3,5) Even though its function is so far unknown, it has been suggested to be involved in the regulation of flowering and the release of winter dormancy(.3,5). In this study, we employ CRISPR-Cas9-mediated gene editing to individually study the function of the FT-like genes in Populus trees. We show that while FT2 is required for vegetative growth during spring and summer and regulates the entry into dormancy, expression of FT1 is absolutely required for bud flush in spring. Gene expression profiling suggests that this function of FT1 is linked to the release of winter dormancy rather than to the regulation of bud flush per se. These data show how FT duplication and sub-functionalization have allowed Populus trees to regulate two completely different and major developmental control points during the yearly growth cycle.

Authors/Creators:André, Domenique and Marcon, Alice and Lee, Keh Chien and Goretti, Daniela and Zhang, Bo and Delhomme, Nicolas and Schmid, Markus and Nilsson, Ove
Title:FLOWERING LOCUS T paralogs control the annual growth cycle in Populus trees
Series Name/Journal:Current Biology
Year of publishing :2022
Volume:32
Number:13
Page range:2988-2996
Number of Pages:9
Publisher:CELL PRESS
ISSN:0960-9822
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 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Microbiology (Microbiology in the medical area to be 30109)
URN:NBN:urn:nbn:se:slu:epsilon-p-118591
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-118591
Additional ID:
Type of IDID
DOI10.1016/j.cub.2022.05.023
Web of Science (WoS)000830839000010
ID Code:28708
Faculty:S - Faculty of Forest Sciences
Department:(S) > Dept. of Forest Genetics and Plant Physiology
Deposited By: SLUpub Connector
Deposited On:01 Sep 2022 10:33
Metadata Last Modified:01 Sep 2022 10:41

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