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Ethylene signaling influences light-regulated development in pea


Weller, JL and Foo, EM and Hecht, V and Ridge, S and Vander Schoor, JK and Reid, JB, Ethylene signaling influences light-regulated development in pea, Plant Physiology, 169, (1) pp. 115-124. ISSN 0032-0889 (2015) [Refereed Article]


Copyright Statement

Copyright 2015 American Society of Plant Biologists

DOI: doi:10.1104/pp.15.00164


Plant responses to light involve a complex network of interactions among multiple plant hormones. In a screen for mutants showing altered photomorphogenesis under red light, we identified a mutant with dramatically enhanced leaf expansion and delayed petal senescence. We show that this mutant exhibits reduced sensitivity to ethylene and carries a nonsense mutation in the single pea (Pisum sativum) ortholog of the ethylene signaling gene ETHYLENE INSENSITIVE2 (EIN2). Consistent with this observation, the ein2 mutation rescues the previously described effects of ethylene overproduction in mature phytochrome-deficient plants. In seedlings, ein2 confers a marked increase in leaf expansion under monochromatic red, far-red, or blue light, and interaction with phytochromeA, phytochromeB, and long1 mutants confirms that ein2 enhances both phytochrome- and cryptochrome-dependent responses in a LONG1-dependent manner. In contrast, minimal effects of ein2 on seedling development in darkness or high-irradiance white light show that ethylene is not limiting for development under these conditions. These results indicate that ethylene signaling constrains leaf expansion during deetiolation in pea and provide further evidence that down-regulation of ethylene production may be an important component mechanism in the broader control of photomorphogenic development by phytochrome and cryptochrome.

Item Details

Item Type:Refereed Article
Keywords:pea, ethylene, photomorphogenesis, leaf expansion
Research Division:Biological Sciences
Research Group:Plant biology
Research Field:Plant physiology
Objective Division:Plant Production and Plant Primary Products
Objective Group:Grains and seeds
Objective Field:Grain legumes
UTAS Author:Weller, JL (Associate Professor Jim Weller)
UTAS Author:Foo, EM (Associate Professor Eloise Foo)
UTAS Author:Hecht, V (Dr Valerie Hecht)
UTAS Author:Ridge, S (Mr Stephen Ridge)
UTAS Author:Vander Schoor, JK (Mrs Jacqueline Vander Schoor)
UTAS Author:Reid, JB (Professor Jim Reid)
ID Code:102532
Year Published:2015
Funding Support:Australian Research Council (DP1095478)
Web of Science® Times Cited:22
Deposited By:Plant Science
Deposited On:2015-08-27
Last Modified:2018-03-18
Downloads:354 View Download Statistics

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