2017 Fiscal Year Final Research Report
Physiological mechanism of leaf hair development in rice
| Project/Area Number |
16H07046
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| Research Category |
Grant-in-Aid for Research Activity Start-up
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| Allocation Type | Single-year Grants |
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| Research Field |
Crop production science
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| Research Institution | Kyushu University |
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Principal Investigator |
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| Project Period (FY) |
2016-08-26 – 2018-03-31
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| Keywords | 葉毛 / 水利用効率 / 温度応答 / 野生イネ |
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| Outline of Final Research Achievements |
Leaf morphological traits that affect water use efficiency are not well known. I examined whether leaf hairiness improves water use efficiency in rice. A chromosome segment introgression line (IL-hairy) of wild Oryza nivara with the genetic background of Oryza sativa cultivar ‘IR24’ had high leaf hair. The leaf hairs developed along small vascular bundles. IL-hairy plants had a warmer leaf surface in sunlight, probably due to increased boundary layer resistance. They had a lower transpiration rate, resulting in higher photosynthetic water use efficiency. Linkage analysis in F2 and F3 populations showed that the trait was governed by a single gene, designated BLANKET LEAF (BKL), on chromosome 6. Furthermore, development of leaf hairs was suppressed under high temperature condition, and a candidate gene of BKL was identified by gene expression analysis.
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| Free Research Field |
作物学
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