Staying hungry:a roadmap to harnessing central regulators of symbiotic nitrogen fixation under fluctuating nitrogen availability  

作　　者：Lijin Qiao Jieshun Lin Takuya Suzaki Pengbo Liang 

机构地区：[1]State Key Laboratory of Plant Environmental Resilience,College of Biological Sciences,China Agricultural University,Beijing,China [2]MOA Key Laboratory of Soil Microbiology,Rhizobium Research Center,China Agricultural University,Beijing,China [3]Department of Molecular Biology and Genetics,Aarhus University,Aarhus,Denmark [4]Faculty of Life and Environmental Sciences,University of Tsukuba,Tsukuba,Ibaraki,Japan [5]Tsukuba Plant-Innovation Research Center,University of Tsukuba,Tsukuba,Ibaraki,Japan

出　　处：《aBIOTECH》2024年第1期107-113,共7页生物技术通报（英文版）

基　　金：This work was supported by the Young Scientists Fund of the National Natural Science Foundation of China(Grant no.32300216)(PL).

摘　　要：Legumes have evolved specific inventions to enhance nitrogen(N)acquisition by establishing symbiotic interactions with N-fixing rhizobial bacteria.Because symbiotic N fixation is energetically costly,legumes have developed sophisticated mechanisms to ensure carbon-nitrogen balance,in a variable environment,both locally and at the whole plant level,by monitoring nodule number,nodule development,and nodular nitrogenase activity,as well as controlling nodule senescence.Studies of the autoregulation of nodulation and regulation of nodulation by nodule inception(NIN)and NIN-LIKE PROTEINs(NLPs)have provided great insights into the genetic mechanisms underlying the nitrateinduced regulation of root nodulation for adapting to N availability in the rhizosphere.However,many aspects of N-induced pleiotropic regulation remain to be fully explained,such as N-triggered senescence in mature nodules.Wang et al.determined that this process is governed by a transcriptional network regulated by NAC-type transcription factors.Characterization and dissection of these soybean nitrogenassociated NAPs(SNAPs)transcription factor-mastered networks have yielded a roadmap for exploring how legumes rewire nodule functions across a range of N levels,laying the foundation for enhancing the growth of N-deprived crops in agricultural settings.

关 键 词：Symbiotic nitrogen fixation N-adapted nodulation Nodule senescence NIN NLPs SNAPs 

分 类 号：Q34[生物学—遗传学]