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Feed-Forward Regulation of Gibberellin Deactivation in Pea


Elliott, RC and Ross, JJ and Smith, JJ and Lester, DR and Reid, JB, Feed-Forward Regulation of Gibberellin Deactivation in Pea, Journal of Plant Growth Regulation, 20, (1) pp. 87-94. ISSN 0721-7595 (2001) [Refereed Article]

DOI: doi:10.1007/s003440010004


Multiple lines of evidence suggest that the genes involved in gibberellin (GA) biosynthesis are regulated by bioactive GA levels. With the recent cloning of GA 2-oxidase genes from pea, we investigated whether this homeostatic regulation extends to the genes controlling GA deactivation in this species, utilizing two well-characterized GA-deficient mutants, ls and na and a GA-accumulating mutant, sln. The pea GA 2-oxidases showed feed-forward effects at the mRNA level, while the endogenous levels of GA 20, GA 29, GA 1, and GA 8 showed no evidence of feed-forward regulation. Analyses of genomic Southern blots and expressed sequenced tag (EST) databases suggest that other GA 2-oxidases could possibly account for this lack of feed-forward on GA levels.

Item Details

Item Type:Refereed Article
Research Division:Biological Sciences
Research Group:Plant biology
Research Field:Plant physiology
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the environmental sciences
UTAS Author:Elliott, RC (Dr Robert Elliott)
UTAS Author:Ross, JJ (Associate Professor John Ross)
UTAS Author:Smith, JJ (Ms Jenny Smith)
UTAS Author:Reid, JB (Professor Jim Reid)
ID Code:22466
Year Published:2001
Web of Science® Times Cited:47
Deposited By:Plant Science
Deposited On:2001-08-01
Last Modified:2010-11-09

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