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| 著者 | Oliver SN,Dennis ES,Dolferus R | |
| タイトル | ABA regulates apoplastic sugar transport and is a potential signal for cold-induced pollen sterility in rice. | |
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Abstract: Cold temperatures cause pollen sterility and large reductions in grain yield in temperate rice growing regions of the world. Induction of pollen sterility by cold involves a disruption of sugar transport in anthers, caused by the cold-induced repression of the apoplastic sugar transport pathway in the tapetum. Here we demonstrate that the phytohormone ABA is a potential signal for cold-induced pollen sterility (CIPS). Cold treatment of the cold-sensitive cultivar Doongara resulted in increased anther ABA levels. Exogenous ABA treatment at the young microspore stage induced pollen sterility and affected cell wall invertase and monosaccharide transporter gene expression in a way similar to cold treatment. In the cold-tolerant cultivar R31, ABA levels were significantly lower under normal circumstances and remained low after cold treatment. The differences in endogenous ABA levels in Doongara and R31 correlated with differences in expression of the ABA biosynthetic genes encoding zeaxanthin epoxidase (OSZEP1) and 9-cis-epoxycarotenoid dioxygenase (OSNCED2, OSNCED3) in anthers. The expression of three ABA-8-hydroxylase genes (ABA8OX1, 2 and 3) in R31 anthers was higher under control conditions and was regulated differently by cold compared with Doongara. Our results indicate that the cold tolerance phenotype of R31 is correlated with lower endogenous ABA levels and a different regulation of ABA metabolism. |
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| 掲載誌 | Plant Cell Physiol. | |
| Country | Australia | |
| 刊数 | 48 | |
| ページ | 1319-30 | |
| 発刊年 | 2007 | |
| PubMed ID | 17693452 | |
| PubMed Central ID | - | |
| DOI | 10.1093/pcp/pcm100 | |
| URL | - | |
| 関連情報 | ||
| 遺伝子 | ABA1 ABA8OX1 ABA8OX2 ABA8OX3 CIN3 MST7 MST8 NCED1 NCED2 NCED3 | |
| INSD | - | |
| 系統 |
野生イネ コアコレクション |
- |
| 突然変異系統(遺伝研 Collection) | - | |
| 種子不稔系統 | - | |
| 致死変異体系統 | - | |
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組織別発生段階 - 突然変異系統(遺伝子) |
- | |
| 栽培イネ品種(遺伝研 Collection) | - | |
| 組織別発生段階 | - | |
