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

IF 4.6 4区 农林科学 Q1 BIOTECHNOLOGY & APPLIED MICROBIOLOGY
Lijin Qiao, Jieshun Lin, Takuya Suzaki, Pengbo Liang
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引用次数: 0

Abstract

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 nitrate-induced 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 nitrogen-associated 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.

保持饥饿:在氮供应波动条件下利用共生固氮中心调节器的路线图
豆科植物通过与固氮根瘤菌建立共生关系,进化出了一些特殊的发明来提高氮(N)的获取能力。由于共生固氮的能量成本很高,豆科植物已经发展出复杂的机制,通过监测结核数量、结核发育和结核固氮酶活性以及控制结核衰老,在多变的环境中确保局部和整个植株水平的碳氮平衡。对结核的自动调节以及结核萌发(NIN)和 NIN-LIKE PROTEINs(NLPs)对结核的调节的研究,为了解硝酸盐诱导的根瘤调节适应根瘤层中氮供应的遗传机制提供了重要见解。然而,氮诱导的多效性调控的许多方面仍有待充分解释,如成熟结核中的氮触发衰老。Wang 等人确定,这一过程受 NAC 型转录因子调控的转录网络支配。对这些大豆氮相关 NAPs(SNAPs)转录因子主控网络的表征和剖析,为探索豆科植物如何在一系列氮水平下重新连接结节功能提供了路线图,为提高农业环境中缺氮作物的生长奠定了基础。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
7.70
自引率
2.80%
发文量
0
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