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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 (2001) Feed-forward regulation of gibberellin deactivation in pea. Journal of plant growth regulation, 20 (1). pp. 87-94. ISSN 0721-7595
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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 GA20, GA29, GA1, and GA8 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.
|Journal or Publication Title:||Journal of plant growth regulation|
|Page Range:||pp. 87-94|
|Identification Number - DOI:||10.1007/s003440010004|
|Additional Information:||Copyright 2001 Springer-Verlag|
|Date Deposited:||31 Jul 2012 07:48|
|Last Modified:||18 Nov 2014 04:39|
|Item Statistics:||View statistics for this item|
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