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

被引：86

作者：

Hwang, YS ^{[1
]}

Thomas, BR ^{[1
]}

Rodriguez, RL ^{[1
]}

机构：

[1] Univ Calif Davis, Sect Mol & Cellular Biol, Davis, CA 95616 USA

来源：

PLANT MOLECULAR BIOLOGY | 1999年 / 40卷 / 06期

基金：

美国国家科学基金会;

关键词：

environmental stress; homeostasis; metabolic regulation; seed germination;

D O I：

10.1023/A:1006241811136

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

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.

引用

页码：911 / 920

页数：10

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