Feed-forward regulation of gibberellin deactivation in pea

被引：51

作者：

Elliott, RC ^{[1
]}

Ross, JJ ^{[1
]}

Smith, JL ^{[1
]}

Lester, DR ^{[1
]}

Reid, JB ^{[1
]}

机构：

[1] Univ Tasmania, Sch Plant Sci, Hobart, Tas 7001, Australia

来源：

JOURNAL OF PLANT GROWTH REGULATION | 2001年 / 20卷 / 01期

关键词：

gibberellin; feed-back; feed-forward; deactivation; GA; 2-oxidation;

D O I：

10.1007/s003440010004

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

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.

引用

页码：87 / 94

页数：8

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