期刊
JOURNAL OF EXPERIMENTAL BOTANY
卷 73, 期 12, 页码 4184-4203出版社
OXFORD UNIV PRESS
DOI: 10.1093/jxb/erac117
关键词
Metabolomics; phospholipids; phosphorus; phosphorus fractions; phosphorus utilization efficiency; phosphorylated compounds; shikimate pathway
资金
- National Natural Science Foundation of China [31972496, 31572190, 32130094]
- Deutsche Forschungsgemeinschaft (DFG) [328017493/GRK 2366]
The efficient utilization of lipid P and nucleic acid P pools, as well as the enhanced expression of the shikimate pathway, contribute to efficient P utilization in maize leaves.
Phosphorus (P) limitation is a significant factor restricting crop production in agricultural systems, and enhancing the internal P utilization efficiency (PUE) of crops plays an important role in ensuring sustainable P use in agriculture. To better understand how P is remobilized to affect crop growth, we first screened P-efficient (B73 and GEMS50) and P-inefficient (Liao5114) maize genotypes at the same shoot P content, and then analyzed P pools and performed non-targeted metabolomic analyses to explore changes in cellular P fractions and metabolites in maize genotypes with contrasting PUE. We show that lipid P and nucleic acid P concentrations were significantly lower in lower leaves of P-efficient genotypes, and these P pools were remobilized to a major extent in P-efficient genotypes. Broad metabolic alterations were evident in leaves of P-efficient maize genotypes, particularly affecting products of phospholipid turnover and phosphorylated compounds, and the shikimate biosynthesis pathway. Taken together, our results suggest that P-efficient genotypes have a high capacity to remobilize lipid P and nucleic acid P and promote the shikimate pathway towards efficient P utilization in maize. Analyses of phosphorus (P) fractions and non-targeted metabolomics suggest that efficient utilization of lipid P and nucleic acid P pools and enhanced expression of the shikimate pathway contribute to efficient P utilization in maize leaves.
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