Strategies of gene action in Arabidopsis during hypoxia
Strategies of gene action in Arabidopsis during hypoxia
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DOI：
10.1093/oxfordjournals.aob.a010302
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发表时间：
1997-01-01
期刊：
影响因子：
4.2
通讯作者：
Peacock, WJ
中科院分区：
文献类型：
--
作者：
Dolferus, R;Ellis, M;Peacock, WJ
不同的植物物种对厌氧胁迫的耐受程度差异很大。这种耐受性背后的精确分子机制尚不清楚，但酒精发酵途径的两种酶，丙酮酸脱羧酶和乙醇脱氢酶，在低氧条件下强烈诱导。我们从拟南芥（Arabidopsis thaliana（L.）嘿这些基因的表达模式已经确定了两套酒精发酵途径基因，每一个都可能在植物对缺氧的适应性反应中发挥不同的作用。一组主要在根中由低氧胁迫强烈诱导，而另一组在根和叶中组成型表达。拟南芥也有两个血红蛋白基因，其中只有一个是由缺氧诱导的。我们正在研究导致adh和pdc诱导的信号转导通路的组成部分。我们的研究结果的意义，植物的代谢工程，以提高耐淹性进行了讨论。(C)1997 Annals of Botany公司
Different plant species vary widely in their degree of tolerance to anaerobic stress. The precise molecular mechanisms underlying such tolerance are unknown, but both enzymes of the alcoholic fermentation pathway, pyruvate decarboxylase and alcohol dehydrogenase, are strongly induced during conditions of low oxygen. We have isolated two adh and two pdc genes in Arabidopsis thaliana (L.)Heynh. The patterns of expression of these genes have identified two sets of alcoholic fermentation pathway genes, each of which might play a different role in tile adaptive response of the plant to anoxia. One set is strongly induced by low oxygen stress mainly in the roots, while the other set is expressed constitutively in both roots and leaves. Arabidopsis also has two haemoglobin genes, only one of which is induced by hypoxia. We are investigating the components of the signal transduction pathways leading to adh and pdc induction. Implications of our findings for metabolic engineering of plants to improve flooding tolerance are discussed. (C) 1997 Annals of Botany Company