Natural variation in ZmGRF10 regulates tolerance to phosphate deficiency in maize by modulating phosphorus remobilization

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外文摘要：Phosphorus is a limiting factor in agriculture due to restricted availability in soil and low utilization effi-ciency of crops. The identification of superior haplotypes of key genes responsible for low-phosphate (Pi) tolerance and their natural variation is important for molecular breeding. In this study,we conducted genome-wide association studies on low-phosphate tolerance coefficients using 152 maize inbred lines,and identified a significant association between SNPs on chromosome 7 and a low-phosphate tolerance coefficient. ZmGRF10 was identified as a candidate gene involved in adaptation of maize to Pi starvation. Expression of ZmGRF10 is induced by Pi starvation. A mutation in ZmGRF10 alleviated Pi starvation stress. RNA-seq analyses revealed significant upregulation of genes encoding various phosphatases in the zmgrf10-1 mutant,suggesting that ZmGRF10 negatively regulates expression of these genes,thereby affecting low-Pi tolerance by suppressing phosphorus remobilization. A superior haplotype with varia-tions in the promoter region exhibited lower transcription activity of ZmGRF10. Our study unveiled a novel gene contributing to tolerance to low-Pi availability with potential to benefit molecular breeding for high Pi utilization.

外文关键词：

CornPhosphate utilization efficiencyGWASPhosphorus metabolism

作者：

Yankai Wang、Xiaohui Peng、Xuechun Lian、Qi Yu、Lingli Zhang、Tingting Li、Haoyu Luo、Kaili Yu、Wenli Zhang、Deyi Zhong、Yonghui Zhao、Shengben Li

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作者单位：

College of Life Sciences,Nanjing Agricultural University,Nanjing 210095,Jiangsu,China

State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization,Nanjing 210095,Jiangsu,China

Academy for Advanced Interdisciplinary Studies,Nanjing Agricultural University,Nanjing 210095,Jiangsu,China

出版年：

2024

DOI：

10.1016/j.cj.2024.08.004

作物学报(英文版)

CSTPCD

ISSN：

年,卷(期)：2024.12(5)