ダウンロード数 : ?
言語
英語
著者
Mitsui, Toshiaki
Yamakawa, Hiromoto
内容記述(抄録等)
High-temperature stress during grain filling hastens the growth rate of endosperm and causes grain chalkiness. Scanning microscopy of chalky areas reveals loosely packed, rounded starch granules with occasional small pits. Intensive investigation of the transcriptome, proteome, and metabolome in developing caryopses under high-temperature stress revealed the downregulation of starch synthesis enzymes and the upregulation of α-amylases. High-temperature ripening may unbalance the synthesis and degradation of starch in the developing endosperm cells. In addition to starches, storage proteins are synthesized, assembled, and stored in developing seeds. Several lines of evidence suggest that redox regulation affects seed maturation, including the accumulation of storage starches and proteins, and thus grain quality. A heat-tolerant cultivar of rice shows a characteristic high expression of superoxide dismutase (SOD). H_2O_2 produced by SOD under hightemperature stress possibly acts as a signal that rapidly can promote the expression of stressresponse proteins. Herein, we will discuss the possible molecular physiology of grain chalking under high-temperature stress.
主題
Chalky grain
grain filling
Oryza sativa
starch synthesis and degradation
stress tolerance
reactive oxygen species
掲載誌名
Plant Production Science
19
1
開始ページ
22
終了ページ
29
ISSN
1343943X
発行日
2016-02-27
DOI
NCID
AA11162156
出版者
日本作物学会
出版者別表記
The Crop Science Society of Japan
Taylor & Francis
資料タイプ
学術雑誌論文
権利関係
© 2016 The Author(s). Published by Taylor & Francis. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
業績ID
e29695
部局
生物資源科学部
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