Is nitrate reductase a major player in the plant NO (nitric oxide) game?

被引：0
作者：
Christian Meyer
Unni S. Lea
Fiona Provan
Werner M. Kaiser
Cathrine Lillo
机构：
[1] Institut Jean-Pierre Bourgin,Unité de Nutrition Azotée des Plantes
[2] INRA,School of Technology and Science
[3] Stavanger University College,Julius
[4] Universität Würzburg,von
来源：
Photosynthesis Research | 2005年 / 83卷
关键词：
abscisic acid; nitrate reductase; nitric oxide; nitric oxide synthase; nitrite; stomata;
D O I：
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中图分类号：
学科分类号：
摘要：
Nitric oxide (NO) is a diffusible, very reactive gas that is involved in the regulation of many processes in plants. Several enzymatic sources of NO production have been identified in recent years. Nitrate reductase (NR) is one of them and it has been shown that this well-known plant protein, apart from its role in nitrate reduction and assimilation, can also catalyse the reduction of nitrite to NO. This reaction can produce large amounts of NO, or at least more than is needed for signalling, as some escape of NO to the outside medium can be detected after NR activation. A role for NO and NR in stomata functioning in response to abscisic acid has also been proposed. The question that remains is whether this NR-derived NO is a signalling molecule or the mere product of an enzymatic side reaction like the products generated by the oxygenase activity of RuBisCO.
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页码：181 / 189
页数：8
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