{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,1]],"date-time":"2026-10-01T19:17:51Z","timestamp":1790882271349,"version":"4.1.0"},"reference-count":130,"publisher":"Frontiers Media SA","license":[{"start":{"date-parts":[[2021,6,22]],"date-time":"2021-06-22T00:00:00Z","timestamp":1624320000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100012226","name":"Fundamental Research Funds for the Central Universities of China","doi-asserted-by":"publisher","award":["lzujbky-2019-72"],"award-info":[{"award-number":["lzujbky-2019-72"]}],"id":[{"id":"10.13039\/501100012226","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100012226","name":"Fundamental Research Funds for the Central Universities of China","doi-asserted-by":"publisher","award":["lzujbky-2020-sp04"],"award-info":[{"award-number":["lzujbky-2020-sp04"]}],"id":[{"id":"10.13039\/501100012226","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["frontiersin.org"],"crossmark-restriction":true},"short-container-title":["Front. Plant Sci."],"abstract":"<jats:p>Nitrogen (N) and phosphorus (P) are the two predominant mineral elements, which are not only essential for plant growth and development in general but also play a key role in symbiotic N fixation in legumes. Legume plants have evolved complex signaling networks to respond to both external and internal levels of these macronutrients to optimize symbiotic N fixation in nodules. Inorganic phosphate (Pi) and nitrate (NO<jats:sub>3<\/jats:sub><jats:sup>\u2212<\/jats:sup>) are the two major forms of P and N elements utilized by plants, respectively. Pi starvation and NO<jats:sub>3<\/jats:sub><jats:sup>\u2212<\/jats:sup> application both reduce symbiotic N fixation <jats:italic>via<\/jats:italic> similar changes in the nodule gene expression and invoke local and long-distance, systemic responses, of which N-compound feedback regulation of rhizobial nitrogenase activity appears to operate under both conditions. Most of the N and P signaling and transport processes have been investigated in model organisms, such as <jats:italic>Medicago truncatula<\/jats:italic>, <jats:italic>Lotus japonicus<\/jats:italic>, <jats:italic>Glycine max<\/jats:italic>, <jats:italic>Phaseolus vulgaris<\/jats:italic>, <jats:italic>Arabidopsis thaliana<\/jats:italic>, <jats:italic>Oryza sativa<\/jats:italic>, etc. We attempted to discuss some of these processes wherever appropriate, to serve as references for a better understanding of the N and P signaling and transport during symbiosis.<\/jats:p>","DOI":"10.3389\/fpls.2021.683601","type":"journal-article","created":{"date-parts":[[2021,6,22]],"date-time":"2021-06-22T06:42:41Z","timestamp":1624344161000},"update-policy":"https:\/\/doi.org\/10.3389\/crossmark-policy","source":"Crossref","is-referenced-by-count":37,"title":["Nitrogen and Phosphorus Signaling and Transport During Legume\u2013Rhizobium Symbiosis"],"prefix":"10.3389","volume":"12","author":[{"given":"Yanlin","family":"Ma","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Rujin","family":"Chen","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1965","published-online":{"date-parts":[[2021,6,22]]},"reference":[{"key":"ref1","doi-asserted-by":"publisher","first-page":"168","DOI":"10.1016\/j.pbi.2017.04.016","article-title":"Phosphate scouting by root tips","volume":"39","author":"Abel","year":"2017","journal-title":"Curr. 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