To grow or not to grow: what can we learn on ethylene-gibberellin cross-talk by in silico gene expression analysis?

Journal of Experimental Botany
Jasper DugardeynDominique Van Der Straeten

Abstract

Ethylene and gibberellins (GAs) are known to influence plant growth by mutual cross-talk and by interaction with other hormones. Transcript meta-analysis shows that GA and ethylene metabolism genes are expressed in the majority of plant organs. Both GAs and the ethylene precursor 1-amino-cyclopropane-1-carboxylic acid (ACC) may thus be synthesized ubiquitously. Transport of both hormones has been described and might hence lead to a controlled distribution. Transcript meta-analysis also suggests that applying exogenous ethylene to plants represses the expression of GA metabolism genes. Conversely, upon treatment with GAs, the expression of some ethylene synthesis genes is up-regulated. The analysis further shows that the genes coding for signalling components of these hormones are expressed throughout the entire plant. However, a tissue-specific transcript meta-analysis of ethylene synthesis and signalling genes in Arabidopsis roots suggests a more localized function of ethylene in the fast elongation and specialization zone, while GA seems to act in the (pro)meristematic zone and in the transition zone. Recent research has shown that brassinosteroids and auxins exert their function at the epidermis, consequently driving organ g...Continue Reading

Citations

Apr 24, 2012·Proceedings of the National Academy of Sciences of the United States of America·Alistair M MiddletonMarkus R Owen
Sep 5, 2012·Journal of Experimental Botany·Roxana KhoshraveshRowan F Sage
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Oct 31, 2009·Plant Signaling & Behavior·María del Carmen Rodríguez-GacioAngel J Matilla
Nov 27, 2014·Frontiers in Plant Science·Bram Van de Poel, Dominique Van Der Straeten
Sep 2, 2016·Journal of Experimental Botany·Yossi BuskilaDani Eshel
Apr 20, 2017·Frontiers in Plant Science·Noushina IqbalM I R Khan
Apr 13, 2018·Proceedings of the National Academy of Sciences of the United States of America·Irina Ivanova VasevaDominique Van Der Straeten
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Sep 30, 2020·The New Phytologist·Richard BarkerPeter Hedden

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