Elevated CO2 effects on nitrogen assimilation and growth of C3 vascular plants are similar regardless of N-form assimilated
Elevated CO2 effects on nitrogen assimilation and growth of C3 vascular plants are similar regardless of N-form assimilated
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DOI：
10.1093/jxb/ery371
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发表时间：
2019-01-15
影响因子：
6.9
通讯作者：
Raven, John A.
中科院分区：
文献类型：
--
作者：
Andrews, Mitchell;Condron, Leo M.;Raven, John A.
大气中二氧化碳浓度（[CO2]）从1750年的约280 ppm增加到2016年的400 ppm，并可能在整个世纪继续增加。据认为，小麦，拟南芥和C-3植物一般更积极地响应大气[CO2]升高铵（NH 4+）营养下比硝酸盐（NO3-）营养下，因为升高的CO2抑制他们的光还原NO3-，从而减少他们的总植物氮（N）的同化，并最终增长。在这里，有人认为，在文献中的证据的重量表明，大气[CO2]升高不抑制NO3-同化和C-3维管植物的生长。普通大豆和小麦的新数据支持这一观点，并表明，大气[CO2]升高对N同化和C-3维管植物生长的影响是相似的，无论同化的N的形式。
Atmospheric carbon dioxide concentration ([CO2]) increased from around 280 ppm in 1750 to 400 ppm in 2016 and is likely to continue to increase throughout this century. It has been argued that wheat, Arabidopsis, and C-3 plants in general respond more positively to elevated atmospheric [CO2] under ammonium (NH4+) nutrition than under nitrate (NO3-) nutrition because elevated CO2 inhibits their photoreduction of NO3- and hence reduces their total plant nitrogen (N) assimilation and ultimately growth. Here, it is argued that the weight of evidence in the literature indicates that elevated atmospheric [CO2] does not inhibit NO3- assimilation and growth of C-3 vascular plants. New data for common bean and wheat support this view and indicate that the effects of elevated atmospheric [CO2] on N assimilation and growth of C-3 vascular plants will be similar regardless of the form of N assimilated.