論文

査読有り
2014年6月

Plant proximity perception dynamically modulates hormone levels and sensitivity in Arabidopsis

JOURNAL OF EXPERIMENTAL BOTANY
  • Jordi Bou-Torrent
  • ,
  • Anahit Galstyan
  • ,
  • Marcal Gallemi
  • ,
  • Nicolas Cifuentes-Esquivel
  • ,
  • Maria Jose Molina-Contreras
  • ,
  • Merce Salla-Martret
  • ,
  • Yusuke Jikumaru
  • ,
  • Shinjiro Yamaguchi
  • ,
  • Yuji Kamiya
  • ,
  • Jaime F. Martinez-Garcia

65
11
開始ページ
2937
終了ページ
2947
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1093/jxb/eru083
出版者・発行元
OXFORD UNIV PRESS

The shade avoidance syndrome (SAS) refers to a set of plant responses initiated after perception by the phytochromes of light enriched in far-red colour reflected from or filtered by neighbouring plants. These varied responses are aimed at anticipating eventual shading from potential competitor vegetation. In Arabidopsis thaliana, the most obvious SAS response at the seedling stage is the increase in hypocotyl elongation. Here, we describe how plant proximity perception rapidly and temporally alters the levels of not only auxins but also active brassinosteroids and gibberellins. At the same time, shade alters the seedling sensitivity to hormones. Plant proximity perception also involves dramatic changes in gene expression that rapidly result in a new balance between positive and negative factors in a network of interacting basic helix-loop-helix proteins, such as HFR1, PAR1, and BIM and BEE factors. Here, it was shown that several of these factors act as auxin-and BR-responsiveness modulators, which ultimately control the intensity or degree of hypocotyl elongation. It was deduced that, as a consequence of the plant proximity-dependent new, dynamic, and local balance between hormone synthesis and sensitivity (mechanistically resulting from a restructured network of SAS regulators), SAS responses are unleashed and hypocotyls elongate.

リンク情報
DOI
https://doi.org/10.1093/jxb/eru083
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000338125600012&DestApp=WOS_CPL
ID情報
  • DOI : 10.1093/jxb/eru083
  • ISSN : 0022-0957
  • eISSN : 1460-2431
  • Web of Science ID : WOS:000338125600012

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