2017 Fiscal Year Final Research Report
A novel gene of seed vernalization that regulates life histories of winter annuals
| Project/Area Number |
25292015
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Partial Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Crop production science
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| Research Institution | Fukui Prefectural University |
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Principal Investigator |
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| Research Collaborator |
KIRIYAMA Kohei
KOBAYASHI Yoshihiro
KUSAKABE Tomoka
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| Project Period (FY) |
2013-04-01 – 2018-03-31
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| Keywords | 冬生一年草 / 生活史進化 / 種子春化 / 遺伝子 / 形質転換 / ヒメムカシヨモギ / オオアレチノギク / シロイヌナズナ |
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| Outline of Final Research Achievements |
Winter annuals have differentiated into two life history types; obligate and facultative. The aims of this study are to identify key traits for the differentiation and to decide responsible genes for the traits. Obligate annuals flower after overwintering with rosette forms. Whereas in facultative annuals, spring-germinating plants flower quickly without having the rosette stage. When non-germinating imbibed-seed of Conyza canadensis, a facultative annual, had been exposed to low temperature, an early flowering trait of the resultant plant was induced. This trait is called seed vernalization. Thus the seed vernalization is the key trait for the life history differentiation between two winter annuals.
We isolated a candidate gene of seed vernalization, PSV, in C. canadensis. The expression pattern of PSV coincided with that of seed vernalization. No PSV homolog was found in known flowering genes. We conclude PSV should be the novel gene that regulates seed vernalization.
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| Free Research Field |
植物生態生理学、植物保護科学
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