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The pea DELLA proteins LA and CRY are important regulators of gibberellin synthesis and root growth


Weston, D and Elliott, RC and Lester, DR and Rameau, C and Reid, JB and Murfet, IC and Ross, JJ, The pea DELLA proteins LA and CRY are important regulators of gibberellin synthesis and root growth, Plant Physiology, 147, (1) pp. 199-205. ISSN 0032-0889 (2008) [Refereed Article]


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DOI: doi:10.1104/pp.108.115808


The theory that bioactive gibberellins (GAs) act as inhibitors of inhibitors of plant growth was based originally on the slender pea (Pisum sativum) mutant (genotype la cry-s), but the molecular nature of this mutant has remained obscure. Here we show that the genes LA and CRYencode DELLA proteins, previously characterized in other species (Arabidopsis [Arabidopsis thaliana] and several grasses) as repressors of growth,which are destabilized byGAs.Mutations la and cry-s encode nonfunctional proteins, accounting for the fact that la cry-s plants are extremely elongated, or slender. We use the la and cry-s mutations to show that in roots, DELLA proteins effectively promote the expression ofGAsynthesis genes, aswell as inhibit elongation.We showalso that one of the DELLAregulated genes is a second member of the pea GA 3-oxidase family, and that this gene appears to play a major role in pea roots.

Item Details

Item Type:Refereed Article
Research Division:Biological Sciences
Research Group:Plant biology
Research Field:Plant physiology
Objective Division:Plant Production and Plant Primary Products
Objective Group:Horticultural crops
Objective Field:Horticultural crops not elsewhere classified
UTAS Author:Weston, D (Mrs Diana Nahodil)
UTAS Author:Elliott, RC (Dr Robert Elliott)
UTAS Author:Lester, DR (Dr Diane Lester)
UTAS Author:Reid, JB (Professor Jim Reid)
UTAS Author:Murfet, IC (Professor Ian Murfet)
UTAS Author:Ross, JJ (Associate Professor John Ross)
ID Code:55049
Year Published:2008
Web of Science® Times Cited:55
Deposited By:Plant Science
Deposited On:2009-03-04
Last Modified:2009-05-18
Downloads:388 View Download Statistics

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