典型文献
Ammonium-dependent regulation of ammonium transporter ZmAMT1s expression conferred by glutamine levels in roots of maize
文献摘要：
In maize, two root epidermis-expressed ammonium transporters ZmAMT1;1a and ZmAMT1;3 play major roles in high-affinity ammonium uptake. However, the transcriptional regulation of ZmAMT1s in roots for ensuring optimal ammonium acquisition remains largely unknown. Here, using a split root system we showed that ZmAMT1;1a and ZmAMT1;3 transcript levels were induced by localized ammonium supply to nitrogen-deficient roots. This enhanced expression of ZmAMT1s correlated with increases in 15NH4+ influx rates and tissue glutamine concentrations in roots. When ammonium was supplied together with methionine sulfoximine, an inhibitor of glutamine synthase, ammonium-induced expression of ZmAMT1s disappeared, suggesting that glutamine rather than ammonium itself regulated ZmAMT1s expression. When glutamine was supplied to nitrogen-deficient roots, expression levels of ZmAMT1s were enhanced, and negative feedback regulation could subsequently occur by supply of glutamine at a high level. Thus, our results indicated an ammonium-dependent regulation of ZmAMT1s at transcript levels, and a dual role of glutamine was suggested in the regulation of ammonium uptake in maize roots.
文献关键词：
中图分类号：
作者姓名：
HUI Jing;LIU Zhi;DUAN Feng-ying;ZHAO Yang;LI Xue-lian;AN Xia;WU Xiang-yu;YUAN Li-xing
作者机构：
College of Resources and Environmental Sciences,China Agricultural University,Beijing 100193,P.R.China
文献出处：
引用格式：
[1]HUI Jing;LIU Zhi;DUAN Feng-ying;ZHAO Yang;LI Xue-lian;AN Xia;WU Xiang-yu;YUAN Li-xing-.Ammonium-dependent regulation of ammonium transporter ZmAMT1s expression conferred by glutamine levels in roots of maize)[J].农业科学学报（英文）,2022(08):2413-2421
A类：
ZmAMT1s,ZmAMT1
B类：
Ammonium,dependent,regulation,ammonium,expression,conferred,by,glutamine,levels,roots,maize,In,two,epidermis,expressed,transporters,1a,play,major,roles,high,affinity,uptake,However,transcriptional,ensuring,optimal,acquisition,remains,largely,unknown,Here,using,split,system,showed,that,were,induced,localized,supply,nitrogen,deficient,This,enhanced,correlated,increases,15NH4+,influx,rates,tissue,concentrations,When,was,supplied,together,methionine,sulfoximine,inhibitor,synthase,disappeared,suggesting,rather,than,itself,regulated,negative,feedback,could,subsequently,occur,Thus,our,results,indicated,dual,suggested
AB值：
0.442813
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