Characteristics and Research Progress of Legume Nodule Senescence.

Abstract

Delaying the nodule senescence of legume crops can prolong the time of nitrogen fixation and attenuate the lack of fertilizer in the later stage of legume crop cultivation, resulting in improved crop yield and reduced usage of nitrogen fertilizer. However, effective measures to delay the nodule senescence of legume crops in agriculture are relatively lacking. In the present review, we summarized the structural and physiological characteristics of nodule senescence, as well as the corresponding detection methods, providing technical support for the identification of nodule senescence phenotype. We then outlined the key genes currently known to be involved in the regulation of nodule senescence, offering the molecular genetic information for breeding varieties with delayed nodule senescence. In addition, we reviewed various abiotic factors affecting nodule senescence, providing a theoretical basis for the interaction between molecular genetics and abiotic factors in the regulation of nodule senescence. Finally, we briefly prospected research foci of nodule senescence in the future.

Plant phenotyping relevance

マメ科根粒老化の構造・生理特性と検出方法をレビューし、根粒老化表現型の同定を技術的に支援することが中心である。

Code and data availability

This is a review article on legume nodule senescence. The supplied blocks describe methods (color-based senescence scoring, cyanmethemoglobin LHb assay, ARA, TUNEL, qPCR, RNA-Seq) only in general terms and cite prior work; no paper-specific phenotype datasets, images, analysis code, models, or supplements with publicde

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