Assimilate translocation and expression of sucrose transporter, OsSUT1, contribute to high-performance ripening under heat stress in the heat-tolerant rice cultivar Genkitsukushi

Masayuki Miyazaki, Masato Araki, Kenta Okamura, Yushi Ishibashi, Takashi Yuasa, Mari Iwaya-Inoue

研究成果: Contribution to journalArticle査読

23 被引用数 (Scopus)

抄録

High temperature reduces the grain quality of rice, a situation likely to become more frequent because of global warming. We studied the effects of high-temperature stress on grain quality of heat-tolerant cultivar 'Genkitsukushi' and heat-sensitive cultivar 'Tsukushiroman'. When day/night temperatures were 31/26. °C from heading until maturity, the grain quality of 'Genkitsukushi' was rated at the first inspection grade (high quality), whereas 'Tsukushiroman' showed a remarkable increase in the percentage of white immature kernels (low quality). Nonstructural carbohydrate content in the stem of 'Genkitsukushi' the early maturation was significantly higher than in 'Tsukushiroman' and greatly decreased under high temperature. From 14 to 21 days after heading, the expression of the sucrose transporter gene, OsSUT1, was higher in the stem of 'Genkitsukushi' grown under high temperature than in 'Tsukushiroman'. In addition, the expression of OsSUT1 in the grains of 'Genkitsukushi' was significantly higher than in 'Tsukushiroman' during the ripening period. These results indicate that sugar transport functions more effectively in 'Genkitsukushi' than in 'Tsukushiroman', and that the effectiveness of sugar transport contributes to maintaining high grain quality in 'Genkitsukushi' under high-temperature conditions.

本文言語英語
ページ(範囲)1579-1584
ページ数6
ジャーナルJournal of Plant Physiology
170
18
DOI
出版ステータス出版済み - 12 15 2013

All Science Journal Classification (ASJC) codes

  • 生理学
  • 農業および作物学
  • 植物科学

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