書誌事項
- 公開日
- 2011-03-21
- 権利情報
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- http://onlinelibrary.wiley.com/termsAndConditions#vor
- DOI
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- 10.1111/j.1365-313x.2011.04533.x
- 公開者
- Wiley
この論文をさがす
説明
<jats:title>Summary</jats:title><jats:p>Root hair growth requires intensive cell‐wall modification. This study demonstrates that root hair‐specific expansin As, a sub‐clade of the cell wall‐loosening expansin proteins, are required for root hair elongation in rice (<jats:italic>Oryza sativa</jats:italic>L.). We identified a gene encoding<jats:italic>EXPA17</jats:italic>(<jats:italic>OsEXPA17</jats:italic>) from a rice mutant with short root hairs. Promoter::reporter transgenic lines exhibited exclusive<jats:italic>OsEXPA17</jats:italic>expression in root hair cells. The OsEXPA17 mutant protein (OsexpA17) contained a point mutation, causing a change in the amino acid sequence (Gly104→Arg). This amino acid alteration is predicted to disrupt a highly conserved disulfide bond in the mutant. Suppression of<jats:italic>OsEXPA17</jats:italic>by RNA interference further confirmed requirement for the gene in root hair elongation. Complementation of the<jats:italic>OsEXPA17</jats:italic>mutant with other root hair EXPAs (OsEXPA30 and Arabidopsis EXPA7) can restore root hair elongation, indicating functional conservation of these root hair EXPAs in monocots and dicots. These results demonstrate that members of the root hair EXPA sub‐clade play a crucial role in root hair cell elongation in Graminaceae.</jats:p>
収録刊行物
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- The Plant Journal
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The Plant Journal 66 (5), 725-734, 2011-03-21
Wiley
