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Feed-forward regulation of gibberellin deactivation in pea

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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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Abstract

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.

Item Type: Article
Journal or Publication Title: Journal of plant growth regulation
Page Range: pp. 87-94
ISSN: 0721-7595
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
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