Discovery of SOD5 as a novel regulator of nitrogen-use efficiency and grain yield via altering auxin level

IF 8.3 1区生物学 Q1 PLANT SCIENCES

New Phytologist Pub Date : 2025-03-06 DOI:10.1111/nph.70038

Siyu Zhang, Yunzhi Huang, Zhe Ji, Yongzhi Fang, Yanan Tian, Chengbo Shen, Yaojun Qin, Menghan Huang, Shuming Kang, Shunqi Li, Xuan Liu, Ying Yu, Zulong Mo, Bingyu Jiang, Yafeng Ye, Shan Li

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引用次数: 0

Abstract

Auxin has emerged as a crucial regulator of plant nitrogen (N)-use efficiency (NUE) through indirect effects on plant growth and development and direct regulation of N metabolism-related genes.
We previously reported DULL NITROGEN RESPONSE1 (DNR1) as an amino transferase that inhibits auxin accumulation and negatively regulates rice (Oryza sativa) NUE and grain yield. However, the identities of molecular regulators acting upstream of DNR1 await exploration.
Our current work identifies SUPPRESSOR OF DNR1 ON CHROMOSOME 5 (SOD5) from a DNR1 suppressor mutant. SOD5 encodes a v-myb avian myeloblastosis viral oncogene homolog (MYB) transcription factor that directly binds to the DNR1 promoter, activating its expression and further repressing auxin accumulation.
Knocking out SOD5 significantly increases NUE and grain yield, especially under low N conditions. Therefore, targeting SOD5 offers a promising strategy for enhancing crop performance, supporting the development of crops better suited for sustainable agriculture.

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来源期刊

New Phytologist 生物-植物科学

自引率

5.30%

发文量

728

期刊介绍： New Phytologist is an international electronic journal published 24 times a year. It is owned by the New Phytologist Foundation, a non-profit-making charitable organization dedicated to promoting plant science. The journal publishes excellent, novel, rigorous, and timely research and scholarship in plant science and its applications. The articles cover topics in five sections: Physiology & Development, Environment, Interaction, Evolution, and Transformative Plant Biotechnology. These sections encompass intracellular processes, global environmental change, and encourage cross-disciplinary approaches. The journal recognizes the use of techniques from molecular and cell biology, functional genomics, modeling, and system-based approaches in plant science. Abstracting and Indexing Information for New Phytologist includes Academic Search, AgBiotech News & Information, Agroforestry Abstracts, Biochemistry & Biophysics Citation Index, Botanical Pesticides, CAB Abstracts®, Environment Index, Global Health, and Plant Breeding Abstracts, and others.