Literature DB >> 10527416

Differential expression of rice alpha-amylase genes during seedling development under anoxia.

Y S Hwang1, B R Thomas, R L Rodriguez.   

Abstract

The unique capability of rice (Oryza sativa L.) seedlings to grow under anoxic conditions may result in part from their ability to express alpha-amylase and maintain the supply of sugar needed for energy metabolism. Previous studies have demonstrated that under aerobic conditions the Amy1 and Amy2 subfamily genes are regulated primarily by phytohormones while the Amy3 subfamily genes are induced during sugar starvation. The expression patterns for these alpha-amylase genes were considerably different in anoxic vs. aerobic rice seedlings. The level of total alpha-amylase mRNA under anoxic conditions was decreased in aleurone layers while it increased in the embryo. Anoxic conditions greatly diminished the expression of the Amy1A gene in aleurone. Conversely, expression of many Amy3 subfamily genes was up-regulated and prolonged in embryo tissues under anoxic conditions.

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Year:  1999        PMID： 10527416     DOI： 10.1023/a:1006241811136

Source DB:  PubMed          Journal:  Plant Mol Biol        ISSN： 0167-4412            Impact factor:   4.076


  26 in total

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Journal:  Plant Physiol       Date:  1998-04       Impact factor: 8.340

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Authors:  E E Karrer; J C Litts; R L Rodriguez
Journal:  Plant Mol Biol       Date:  1991-05       Impact factor: 4.076

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Journal:  Arch Biochem Biophys       Date:  1991-02-01       Impact factor: 4.013
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  29 in total

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7.  The modified rice αAmy8 promoter confers high-level foreign gene expression in a novel hypoxia-inducible expression system in transgenic rice seedlings.

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8.  Structural analysis of a calmodulin variant from rice: the C-terminal extension of OsCaM61 regulates its calcium binding and enzyme activation properties.

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9.  Rice alcohol dehydrogenase 1 promotes survival and has a major impact on carbohydrate metabolism in the embryo and endosperm when seeds are germinated in partially oxygenated water.

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10.  Interference with oxidative phosphorylation enhances anoxic expression of rice alpha-amylase genes through abolishing sugar regulation.

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