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Research article - Peer-reviewed, 2022

PIF7 is a master regulator of thermomorphogenesis in shade

Burko, Yogev; Willige, Bjorn Christopher; Seluzicki, Adam; Novak, Ondrej; Ljung, Karin; Chory, Joanne;

Abstract

Plant hypocotyl elongation response to light and temperature. Here the authors show that shade combined with warm temperature synergistically enhances the hypocotyl growth response via the PIF7 transcription factor, auxin, and as yet unknown factor.The size of plant organs is highly responsive to environmental conditions. The plant's embryonic stem, or hypocotyl, displays phenotypic plasticity, in response to light and temperature. The hypocotyl of shade avoiding species elongates to outcompete neighboring plants and secure access to sunlight. Similar elongation occurs in high temperature. However, it is poorly understood how environmental light and temperature cues interact to effect plant growth. We found that shade combined with warm temperature produces a synergistic hypocotyl growth response that dependent on PHYTOCHROME-INTERACTING FACTOR 7 (PIF7) and auxin. This unique but agriculturally relevant scenario was almost totally independent on PIF4 activity. We show that warm temperature is sufficient to promote PIF7 DNA binding but not transcriptional activation and we demonstrate that additional, unknown factor/s must be working downstream of the phyB-PIF-auxin module. Our findings will improve the predictions of how plants will respond to increased ambient temperatures when grown at high density.

Published in

Nature Communications

2022, volume: 13, article number: 4942
Publisher: NATURE PORTFOLIO

Authors' information

Burko, Yogev
VOLCANI INSTITUTE OF AGRICULTURAL RESEARCH
Burko, Yogev
Howard Hughes Medical Institute
Burko, Yogev
Salk Institute
Willige, Bjorn Christopher
Howard Hughes Medical Institute
Willige, Bjorn Christopher
Salk Institute
Seluzicki, Adam
Salk Institute
Czech Academy of Sciences
Swedish University of Agricultural Sciences, Department of Forest Genetics and Plant Physiology
Swedish University of Agricultural Sciences, Department of Forest Genetics and Plant Physiology
Chory, Joanne
Howard Hughes Medical Institute
Chory, Joanne
Salk Institute

UKÄ Subject classification

Plant Biotechnology
Botany

Publication Identifiers

DOI: https://doi.org/10.1038/s41467-022-32585-6

URI (permanent link to this page)

https://res.slu.se/id/publ/119084