A magnesium efflux transporter required for seed development and eating quality in rice

mutants exhibit decreased Mg accumulation in the grain, which are smaller, lighter, and shriveled, but show increased accumulation in the husk. The eating quality of the mutant grains is significantly decreased compared with the wild-type rice. These results indicate that OsMGR2 plays multiple roles within the rice; facilitating the root-to-shoot Mg translocation, mediating phloem-to-xylem Mg transfer at nodes for preferential distribution to the most active leaf, and exporting Mg from maternal vascular tissues of the caryopsis to the grains, processes essential for grain development and eating quality in rice.

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Publication Details

Journal
Proceedings of the National Academy of Sciences
Published
2026-04-22
DOI
https://doi.org/10.1073/pnas.2536813123
Primary Topic
Magnesium in Health and Disease
Type
article
Field-Weighted Citation Impact
0.00

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article

A magnesium efflux transporter required for seed development and eating quality in rice

June‐Sik Kim, Namiki Mitani‐Ueno, 長屋 優, Takaaki Miyaji et al.
Proceedings of the National Academy of Sciences
Magnesium in Health and Disease
article

A magnesium efflux transporter required for seed development and eating quality in rice

June‐Sik Kim, Namiki Mitani‐Ueno, 長屋 優, Takaaki Miyaji, Sheng Huang, Miho Kashino, Kiyosumi Hori, Naoki Yamaji, Shin‐ichiro Inoue, Yuma Yoshioka, Min Ning, Jian Feng Ma
article en

Abstract

mutants exhibit decreased Mg accumulation in the grain, which are smaller, lighter, and shriveled, but show increased accumulation in the husk. The eating quality of the mutant grains is significantly decreased compared with the wild-type rice. These results indicate that OsMGR2 plays multiple roles within the rice; facilitating the root-to-shoot Mg translocation, mediating phloem-to-xylem Mg transfer at nodes for preferential distribution to the most active leaf, and exporting Mg from maternal vascular tissues of the caryopsis to the grains, processes essential for grain development and eating quality in rice.

Proceedings of the National Academy of SciencesVol. 123(17)
National Agriculture and Food Research Organization (JP), Okayama University (JP), Centre for Innovation in Regulatory Science (GB), RIKEN Center for Sustainable Resource Science (JP), Advanced Science Research Center (JP), Genomics (United Kingdom) (GB), Institute of Crop Science (JP), Hunan Agricultural University (CN), Saitama University (JP)
Japan Society for the Promotion of Science London, Japan Society for the Promotion of Science
Zero hunger
Openalex Percentile: Top 11%
Magnesium in Health and Disease
DOIOpen Access PDFOpenAlex
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A magnesium efflux transporter required for seed development and eating quality in rice — June‐Sik Kim, Namiki Mitani‐Ueno, et al. · Proceedings of the National Academy of Sciences (2026) | TGRS Research Map | TGRS