Maize zinc uptake is influenced by arbuscular mycorrhizal symbiosis under various soil phosphorus availabilities

文献类型： 外文期刊

第一作者： Yu, Baogang

作者： Yu, Baogang;Zhou, Chengxiang;Zou, Chunqin;Yu, Baogang;Yu, Peng;Yu, Baogang;Hochholdinger, Frank;Yu, Peng;Wang, Zhonghua;Bucher, Marcel;Bucher, Marcel;Schaaf, Gabriel;Sawers, Ruairidh J. H.;Chen, Xinping;Chen, Xinping

作者机构：

关键词： arbuscular mycorrhizal; extraradical hyphae; maize; phosphorus; RNA sequencing; zinc; zinc transporter

期刊名称：NEW PHYTOLOGIST （ 影响因子：8.3； 五年影响因子：10.2 ）

ISSN： 0028-646X

年卷期： 2024 年 243 卷 5 期

页码：

收录情况： SCI

摘要： The antagonistic interplay between phosphorus (P) and zinc (Zn) in plants is well established. However, the molecular mechanisms mediating those interactions as influenced by arbuscular mycorrhizal (AM) symbiosis remain unclear. We investigated Zn concentrations, root AM symbiosis, and transcriptome profiles of maize roots grown under field conditions upon different P levels. We also validated genotype-dependent P-Zn uptake in selected genotypes from a MAGIC population and conducted mycorrhizal inoculation experiments using mycorrhizal-defective mutant pht1;6 to elucidate the significance of AM symbiosis in P-Zn antagonism. Finally, we assessed how P supply affects Zn transporters and Zn uptake in extraradical hyphae within a three-compartment system. Elevated P levels led to a significant reduction in maize Zn concentration across the population, correlating with a marked decline in AM symbiosis, thus elucidating the P-Zn antagonism. We also identified ZmPht1;6 is crucial for AM symbiosis and confirmed that P-Zn antagonistic uptake is dependent on AM symbiosis. Moreover, we found that high P suppressed the expression of the fungal RiZRT1 and RiZnT1 genes, potentially impacting hyphal Zn uptake. We conclude that high P exerts systemic regulation over root and AM hyphae-mediated Zn uptake in maize. These findings hold implications for breeding Zn deficiency-tolerant maize varieties.

分类号：

  • 相关文献
作者其他论文 更多>>

微信小程序