| Project/Area Number |
25660025
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Horticultural science
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| Research Institution | Kyoto University |
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Principal Investigator |
YAMANE Hisayo 京都大学, (連合)農学研究科(研究院), 講師 (80335306)
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| Co-Investigator(Renkei-kenkyūsha) |
HABU Tsuyoshi 愛媛大学, 農学部, 准教授 (60335304)
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| Research Collaborator |
TANAKA Yusuke
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| Project Period (FY) |
2013-04-01 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2014: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2013: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
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| Keywords | 果樹 / 花成 / 相転換 / 園芸学 |
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| Outline of Final Research Achievements |
Long period of juvenile phase (several years) in fruit tree species inhibits their rapid breeding. Understanding the internal control mechanism of phase transition from juvenile phase to adult phase would provide new insights to control flowering time in fruit tree species. Recently, two microRNAs such as miR156 and miR172 were reported to control phase transition in woody perennials. Here, we examined whether the same control mechanisms exist in deciduous fruit tree, Japanese apricot (Prunus mume) and evergreen fruit tree, grapefruit (Citrus paradisi). We found that miR156 and miR172 was up- and down-regulated, respectively, in juvenile phase whereas the opposite expression patterns were found in adult phase. Correlation between miR156/miR172 expressions and internally-regulated juvenility in adult tree was also found. Taken together, these results suggested that miR156/miR172 might be involved in internal control mechanism of vegetative phase transition in fruit trees.
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