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The transcription factor OsNAC25 regulates potassium homeostasis in rice

文献类型： 外文期刊

作者： Wang, Chen 1 ; Song, Shaowen 1 ; Fu, Jun 2 ; Wang, Kai 2 ; Chen, Xuan 1 ; Bo, Bin 3 ; Chen, Zhe 3 ; Zhang, Linan 1 ; Zhang, Lin 1 ; Wang, Xiaohui 1 ; Tang, Niwen 1 ; Tian, Xiangrong 4 ; Chen, Liangbi 1 ; Luan, Sheng 5 ; Yang, Yuanzhu 2 ; Mao, Dandan 1 ;

作者机构： 1.Hunan Normal Univ, Coll Life Sci, Hunan Prov Key Lab Crop Sterile Germplasm Resource, Changsha, Peoples R China

2.Yuan Longping High Tech Agr Co Ltd, Key Lab Southern Rice Innovat & Improvement, Hunan Engn Lab Dis & Pest Resistant Rice Breeding, Minist Agr & Rural Affairs, Changsha, Peoples R China

3.Hunan Hybrid Rice Res Ctr, State Key Lab Hybrid Rice, Changsha, Hunan, Peoples R China

4.Jishou Univ, Coll Biol & Environm Sci, Jishou, Peoples R China

5.Univ Calif Berkeley, Dept Plant & Microbial Biol, Berkeley, CA 94720 USA

关键词： Potassium; rice; OsNAC25; K+ uptake; low K+ stress; natural variation

期刊名称：PLANT BIOTECHNOLOGY JOURNAL （ 影响因子：10.5； 五年影响因子：12.4 ）

ISSN： 1467-7644

年卷期： 2025 年 23 卷 3 期

页码：

收录情况： SCI

摘要： Over-application of potassium (K) fertilizer in fields has a negative impact on the environment. Developing rice varieties with high KUE will reduce fertilizer for sustainable agriculture. However, the genetic basis of KUE in a more diverse and inclusive population remains largely unexplored. Here, we show that the transcription factor OsNAC25 enhances K+ uptake and confers high KUE under low K+ supply. Disruption of OsNAC25 by CRISPR/Cas9-mediated mutagenesis led to a considerable loss of K+ uptake capacity in rice roots, coupled with reduced K+ accumulation in rice and severe plant growth defects under low- K+ conditions. However, the overexpression of OsNAC25 enhanced K+ accumulation by regulating proper K+ uptake capacity in rice roots. Further analysis displayed that OsNAC25 can bind to the promoter of OsSLAH3 to repress its transcription in response to low- K+ stress. Nucleotide diversity analyses suggested that OsNAC25 may be selected during japonica populations' adaptation of low K+ tolerance. Natural variation of OsNAC25 might cause differential expression in different haplotype varieties, thus conferring low K+ tolerance in the Hap 1 and Hap 4 -carrying varieties, and the japonica allele OsNAC25 could enhance low K+ tolerance in indica variety, conferring great potential to improve indica low K+ tolerance and grain development. Taken together, we have identified a new NAC regulator involved in rice low K+ tolerance and grain development, and provide a potential target gene for improving low K+ tolerance and grain development in rice.

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