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OsNLP3 and OsPHR2 orchestrate direct and mycorrhizal pathways for nitrate uptake by regulating NAR2.1–NRT2s complexes in rice

Artículo

 

Te invitamos a leer el artículo "OsNLP3 and OsPHR2 orchestrate direct and mycorrhizal pathways for nitrate uptake by regulating NAR2.1–NRT2s complexes in rice" publicado en PNAS, ​a cargo del profesor investigador Dr. Luis Rafael Herrera Estrella y su equipo de trabajo de la UGA.

Autores:  Shuangshuang Wang / Hanghang Ye / Congfan Yanga / Yan Zhang / Yuhan Ren / Kun Xie / Lingxiao Wang / Dechao Zeng / Haoqiang He / Haoyan Ji / LLuis Herrera-Estrella / Guohua Xu / Aiqun Chen

  1. State Key Laboratory of Crop Genetics

  2. Department of Plant Nutrition

  3. College of Resources and Environmental Sciences

  4. Nanjing Agricultural University

  5. Nanjing 210095, China

  6. Unidad de Genomica Avanzada (UGA) del Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional (Cinvestav), Irapuato, Guanjuato, Mexico

Felicitamos al estudiantado y profesorado que contribuyeron en esta investigación por su arduo trabajo.

Summary:

Nitrogen (N) is the most important essential nutrient required by plants. Most land plants have evolved two N uptake pathways, a direct root pathway and a symbiotic pathway, via association with arbuscular mycorrhizal (AM) fungi. However, the interaction between the two pathways is ambiguous. Here, we report that OsNAR2.1–OsNRT2s, the nitrate (NO3) transporter complexes with crucial roles in direct NO3 uptake, are also recruited for symbiotic NO3 uptake. OsNAR2.1 and OsNRT2.1/2.2 are coregulated by NIN-like protein 3 (OsNLP3), a key regulator in NO3 signaling, and OsPHR2, a major regulator of phosphate starvation responses. More importantly, AM symbiosis induces expression of OsNAR2.1OsNRT2s, OsNLP3, and OsSPX4, encoding an intracellular Pi sensor, in arbuscular-containing cells, but weakens their expression in the epidermis. OsNAR2.1 and OsNLP3 can activate both mycorrhizal NO3 uptake and mycorrhization efficiency. Overall, we demonstrate that OsNLP3 and OsPHR2 orchestrate the direct and mycorrhizal NO3 uptake pathways by regulating the NAR2.1–NRT2s complexes in rice.


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24/02/2025 10:04:30 a. m.