MYCs and PIFs Act Independently in Arabidopsis Growth Regulation
Open Access
- 1 May 2020
- journal article
- research article
- Published by Oxford University Press (OUP) in G3 Genes|Genomes|Genetics
- Vol. 10 (5), 1797-1807
- https://doi.org/10.1534/g3.120.401188
Abstract
Plants have a variety of strategies to avoid canopy shade and compete with their neighbors for light, collectively called the shade avoidance syndrome (SAS). Plants also have extensive systems to defend themselves against pathogens and herbivores. Defense and shade avoidance are two fundamental components of plant survival and productivity, and there are often tradeoffs between growth and defense. Recently, MYC2, a major positive regulator of defense, was reported to inhibit elongation during shade avoidance. Here, we further investigate the role of MYC2 and the related MYC3 and MYC4 in shade avoidance, and we examine the relationship between MYC2/3/4 and the PIF family of light-regulated transcription factors. We demonstrate that MYC2/3/4 inhibit both elongation and flowering. Furthermore, using both genetic and transcriptomic analysis we find that MYCs and PIFs generally function independently in growth regulation. However, surprisingly, the pif4/5/7 triple mutant restored the petiole shade avoidance response of myc2 (jin1-2) and myc2/3/4. We theorize that increased petiole elongation in myc2/3/4 could be more due to resource tradeoffs or post-translational modifications rather than interactions with PIF4/5/7 affecting gene regulation.Keywords
This publication has 67 references indexed in Scilit:
- Jasmonate Controls Leaf Growth by Repressing Cell Proliferation and the Onset of Endoreduplication while Maintaining a Potential Stand-By ModePlant Physiology, 2013
- Linking photoreceptor excitation to changes in plant architectureGenes & Development, 2012
- Genomic Analysis of Circadian Clock-, Light-, and Growth-Correlated Genes Reveals PHYTOCHROME-INTERACTING FACTOR5 as a Modulator of Auxin Signaling in ArabidopsisPlant Physiology, 2011
- Characterization of JAZ-interacting bHLH transcription factors that regulate jasmonate responses in ArabidopsisJournal of Experimental Botany, 2011
- Using knockout mutants to reveal the growth costs of defensive traitsProceedings Of The Royal Society B-Biological Sciences, 2011
- PAIR: the predicted Arabidopsis interactome resourceNucleic Acids Research, 2010
- Ecological modulation of plant defense via phytochrome control of jasmonate sensitivityProceedings of the National Academy of Sciences of the United States of America, 2009
- Salicylic acid deficiency in NahG transgenic lines and sid2 mutants increases seed yield in the annual plant Arabidopsis thalianaJournal of Experimental Botany, 2009
- TheArabidopsisPhytochrome-Interacting Factor PIF7, Together with PIF3 and PIF4, Regulates Responses to Prolonged Red Light by Modulating phyB LevelsPlant Cell, 2008
- Sucrose Transporter StSUT4 from Potato Affects Flowering, Tuberization, and Shade Avoidance ResponsePlant Physiology, 2007