文章基本信息

标题：Nitrate assimilation in plant shoots depends on photorespiration
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作者：Shimon Rachmilevitch ; Asaph B. Cousins ; Arnold J. Bloom 等
期刊名称：Proceedings of the National Academy of Sciences
印刷版ISSN：0027-8424
电子版ISSN：1091-6490
出版年度：2004
卷号：101
期号：31
页码：11506-11510
DOI：10.1073/pnas.0404388101
语种：English
出版社：The National Academy of Sciences of the United States of America
摘要：Photorespiration, a process that diminishes net photosynthesis by {approx}25% in most plants, has been viewed as the unfavorable consequence of plants having evolved when the atmosphere contained much higher levels of carbon dioxide than it does today. Here we used two independent methods to show that exposure of Arabidopsis and wheat shoots to conditions that inhibited photorespiration also strongly inhibited nitrate assimilation. Thus, nitrate assimilation in both dicotyledonous and monocotyledonous species depends on photorespiration. This previously undescribed role for photorespiration (i) explains several responses of plants to rising carbon dioxide concentrations, including the inability of many plants to sustain rapid growth under elevated levels of carbon dioxide; and (ii) raises concerns about genetic manipulations to diminish photorespiration in crops.
关键词：global climate change ; CO2 acclimation ; Arabidopsis ; wheat