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 deve...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.展开更多
One of the remarkable features of plants is that of long-distance signaling between their root and shoot systems.This enables plants,which are sessile organisms,to respond and adapt to environmental changes such as nu...One of the remarkable features of plants is that of long-distance signaling between their root and shoot systems.This enables plants,which are sessile organisms,to respond and adapt to environmental changes such as nutrient stress(Okamoto et al.2016).Most species of legumes possess root nodules that are induced by symbiotic nitrogen-fixing rhizobia.展开更多
基金This work was supported by the Young Scientists Fund of the National Natural Science Foundation of China(Grant no.32300216)(PL).
文摘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.
文摘One of the remarkable features of plants is that of long-distance signaling between their root and shoot systems.This enables plants,which are sessile organisms,to respond and adapt to environmental changes such as nutrient stress(Okamoto et al.2016).Most species of legumes possess root nodules that are induced by symbiotic nitrogen-fixing rhizobia.
