Sugar transporter modulates nitrogen-determined tillering and yield formation in rice

Jinfei Zhang, Yuyi Zhang, Jingguang Chen, Mengfan Xu, Xinyu Guan, Cui Wu, Shunan Zhang, Hongye Qu, Jinfang Chu, Yifeng Xu, Mian Gu, Ying Liu () and Guohua Xu ()
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Jinfei Zhang: Nanjing Agricultural University
Yuyi Zhang: Nanjing Agricultural University
Jingguang Chen: Shenzhen Campus of Sun Yat-sen University
Mengfan Xu: Nanjing Agricultural University
Xinyu Guan: Nanjing Agricultural University
Cui Wu: Nanjing Agriculture University
Shunan Zhang: Nanjing Agricultural University
Hongye Qu: Nanjing Agricultural University
Jinfang Chu: Chinese Academy of Sciences
Yifeng Xu: Nanjing Agriculture University
Mian Gu: Nanjing Agricultural University
Ying Liu: Nanjing Agricultural University
Guohua Xu: Nanjing Agricultural University

Nature Communications, 2024, vol. 15, issue 1, 1-16

Abstract: Abstract Nitrogen (N) fertilizer application ensures crop production and food security worldwide. N-controlled boosting of shoot branching that is also referred as tillering can improve planting density for increasing grain yield of cereals. Here, we report that Sugar Transporter Protein 28 (OsSTP28) as a key regulator of N-responsive tillering and yield formation in rice. N supply inhibits the expression of OsSTP28, resulting in glucose accumulation in the apoplast of tiller buds, which in turn suppresses the expression of a transcriptional inhibitor ORYZA SATIVA HOMEOBOX 15 (OSH15) via an epigenetic mechanism to activate gibberellin 2-oxidases (GA2oxs)-facilitated gibberellin catabolism in shoot base. Thereby, OsSTP28-OSH15-GA2oxs module reduces the level of bioactive gibberellin in shoot base upon increased N supply, and consequently promotes tillering and grain yield. Moreover, we identify an elite allele of OsSTP28 that can effectively promote N-responsive tillering and yield formation, thus representing a valuable breeding target of N use efficiency improvement for agricultural sustainability.

Date: 2024
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DOI: 10.1038/s41467-024-53651-1

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