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.
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Wang, SM., Lue, WL., Eimert, K. et al. Phytohormone-regulated β-amylase gene expression in rice. Plant Mol Biol 31, 975–982 (1996). https://doi.org/10.1007/BF00040716
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DOI: https://doi.org/10.1007/BF00040716