Click here to close Hello! We notice that you are using Internet Explorer, which is not supported by Xenbase and may cause the site to display incorrectly. We suggest using a current version of Chrome, FireFox, or Safari.
XB-ART-58992
Nat Genet 2021 Jun 01;536:906-915. doi: 10.1038/s41588-021-00855-6.
Show Gene links Show Anatomy links

A plasma membrane transporter coordinates phosphate reallocation and grain filling in cereals.

Ma B , Zhang L , Gao Q , Wang J , Li X , Wang H , Liu Y , Lin H , Liu J , Wang X , Li Q , Deng Y , Tang W , Luan S , He Z .


???displayArticle.abstract???
Phosphate (Pi) is essential to plant growth and crop yield. However, it remains unknown how Pi homeostasis is maintained during cereal grain filling. Here, we identified a rice grain-filling-controlling PHO1-type Pi transporter, OsPHO1;2, through map-based cloning. Pi efflux activity and its localization to the plasma membrane of seed tissues implicated a specific role for OsPHO1;2 in Pi reallocation during grain filling. Indeed, Pi over-accumulated in developing seeds of the Ospho1;2 mutant, which inhibited the activity of ADP-glucose pyrophosphorylase (AGPase), important for starch synthesis, and the grain-filling defect was alleviated by overexpression of AGPase in Ospho1;2-mutant plants. A conserved function was recognized for the maize transporter ZmPHO1;2. Importantly, ectopic overexpression of OsPHO1;2 enhanced grain yield, especially under low-Pi conditions. Collectively, we discovered a mechanism underlying Pi transport, grain filling and P-use efficiency, providing an efficient strategy for improving grain yield with minimal P-fertilizer input in cereals.

???displayArticle.pubmedLink??? 33927398
???displayArticle.link??? Nat Genet



References [+] :
Arpat, Functional expression of PHO1 to the Golgi and trans-Golgi network and its role in export of inorganic phosphate. 2012, Pubmed