期刊
PLANT AND CELL PHYSIOLOGY
卷 59, 期 8, 页码 1683-1694出版社
OXFORD UNIV PRESS
DOI: 10.1093/pcp/pcy094
关键词
Arbuscular mycorrhizal fungi (AMF) symbiosis; PHT1 phosphate transporter; Phosphate nutrition; Zea mays; ZmPt9
资金
- National Key Research and Development Program of China [2016YFD0300300]
- National Science Foundation of China [31470465, 31640057]
- Project of Natural Science Foundation of Anhui Province [1708085MC53]
Phosphorus (P) is an essential macronutrient for plant life, although it is frequently not readily available to crops. Arbuscular mycorrhiza fungi (AMF) can improve plant P levels by inducing the expression of some phosphate (Pi) transporters. Symbiotic Pi uptake by Pi transporters is crucial for AMF colonization and arbuscule dynamics. However, the functions of mycorrhiza-inducible maize Pi transporters are largely unclear. We focused on the interaction between the Pi concentration and AMF colonization in maize, and detecting the induction of a Pi transporter. We investigated AMF colonization and arbuscular development in maize under high and low Pi environments. Low Pi increased AMF colonization and promoted arbuscular development. Further measurement of P concentration showed that AMF significantly improved the maize P status under low Pi conditions. Here, we identified the Pi transporter gene, ZmPt9, which was induced by mycorrhiza formation. In addition, ZmPt9-overexpressing roots were difficult to colonize by AMF. Pi response analysis showed that ZmPt9 complements a yeast mutant defective in Pi transporter activity and improves the P concentration in rice. Together, these data indicated that ZmPt9 is a mycorrhiza-inducible Pi transporter gene involved in Pi uptake.
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