ISSN:
1573-5028
Keywords:
rice germinating seeds
;
β-amylase
;
phytohormone
;
gibberellin
;
abscisic acid
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract The expression of β-amylase genes in rice (Oryza sativa) and its regulation by phytohormones gibberellic acid (GA) and abscisic acid (ABA) were examined. Upon germination β-amylase is synthesizedde novo in aleurone cells and (GA) is not required. Exogenous addition of GA does not enhance the β-amylase activity, while ABA inhibits the β-amylase activity, mRNA accumulation, and the germination of rice seeds. GA can reverse ABA inhibition of β-amylase expression, but not ABA inhibition of seed germination. Such regulation represents a new interaction of ABA and GA.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00040716
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