Phytohormone-regulated Beta-amylase Gene Expression in Rice

Overview

Journal Plant Mol Biol

Date 1996 Aug 1

PMID 8843940

Citations 9

Authors

S M Wang

W L Lue

K. Eimert

J Chen

Affiliations

Soon will be listed here.

Abstract

The expression of beta-amylase genes in rice (Oryza sativa) and its regulation by phytohormones gibberellic acid (GA) and abscisic acid (ABA) were examined. Upon germination beta-amylase is synthesized de novo in aleurone cells and (GA) is not required. Exogenous addition of GA does not enhance the beta-amylase activity, while ABA inhibits the beta-amylase activity, mRNA accumulation, and the germination of rice seeds. GA can reverse ABA inhibition of beta-amylase expression, but not ABA inhibition of seed germination. Such regulation represents a new interaction of ABA and GA.

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