期刊
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
卷 117, 期 24, 页码 13792-13799出版社
NATL ACAD SCIENCES
DOI: 10.1073/pnas.1907969117
关键词
shade avoidance; thermomorphogenesis; environment; gibberellin; growth
资金
- Agencia Espanola de Investigacion/Fondo Europeo para el Desarrollo Regional/Union Europea [BIO2016-79133-P, BIO2013-46539-R, BIO2016-80551-R]
- European Union SIGNAT-Research and Innovation Staff Exchange [H2020-MSCA-RISE-2014-644435]
- Argentinian Agencia Nacional de Promocion Cientifica y Tecnologica [2016-1459]
- Universidad de Buenos Aires [20020170100505BA]
- National Institute of General Medical Sciences of the National Institutes of Health [R01GM067837, R01GM056006]
- German Research Foundation (DFG) under Germany's Excellence Strategy/Initiative (Cluster of Excellence on Plant Sciences - Excellence Cluster) [EXC-2048/1, 390686111]
- International Max Planck Research School of the Max Planck Society
- Ministry of Education, Youth and Sports of the Czech Republic (Central European Institute of Technology 2020) [LQ1601]
- Ministerio de Economia y Competitividad-Formacion de Personal Investigador Program fellowships
- Spanish Ministry of Economy, Industry and Competitiveness
- University of Dusseldorf
- University of Cologne
DELLA transcriptional regulators are central components in the control of plant growth responses to the environment. This control is considered to be mediated by changes in the metabolism of the hormones gibberellins (GAs), which promote the degradation of DELLAs. However, here we show that warm temperature or shade reduced the stability of a GA -insensitive DELLA allele in Arabidop- sis thaliana . Furthermore, the degradation of DELLA induced by the warmth preceded changes in GA levels and depended on the E3 ubiquitin ligase CONSTITUTIVELY PHOTOMORPHOGENIC1 (COP1). COP1 enhanced the degradation of normal and GA - insensitive DELLA alleles when coexpressed in Nicotiana ben- thamiana. DELLA proteins physically interacted with COP1 in yeast, mammalian, and plant cells. This interaction was enhanced by the COP1 complex partner SUPRESSOR OF phyA-105 1 (SPA1). The level of ubiquitination of DELLA was enhanced by COP1 and COP1 ubiquitinated DELLA proteins in vitro. We propose that DEL- LAs are destabilized not only by the canonical GA -dependent path- way but also by COP1 and that this control is relevant for growth responses to shade and warm temperature.
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