2023 Fiscal Year Final Research Report
Physiological and ecological approaches to the mechanism of daylength loss of flower initiation after dormancy breaking in strawberry.
| Project/Area Number |
20K06021
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 39030:Horticultural science-related
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| Research Institution | Akita Prefectural University |
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Principal Investigator |
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| Project Period (FY) |
2020-04-01 – 2024-03-31
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| Keywords | イチゴ / 休眠 / 低温遭遇量 |
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| Outline of Final Research Achievements |
In strawberry, in order to clarify the mechanism of the loss of daylength response of flower development after dormancy awakening, we treated the temperatures of leaves, crown, and roots at different temperatures related to dormancy, and clarified the low-temperature sensitive sites and their interactions. The results showed that the crown was the most sensitive site to low temperature, and that the interaction was leaf, root, and crown for heating, but leaf, crown, root for cooling. In addition, treatment with plant growth regulators related to dormancy, gibberellin broke dormancy but inhibited flower bud differentiation, while the biosynthesis inhibitor showed a tendency to inhibit dormancy breaking and also flower bud differentiation.
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| Free Research Field |
野菜園芸学
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| Academic Significance and Societal Importance of the Research Achievements |
イチゴの低温感応部位に関しては，クラウン部と考えられていたが，明確にそれを示すデータは少なかった．本研究の結果から，クラウン部であるこを明らかにした．また，イチゴの栽培では，休眠覚醒後の日長不感応期間は，寒冷地のイチゴ栽培では，大きな課題であったが，今回の成果は，クラウン部のみを加温することで，半休眠を維持することで，この課題を回避できる可能性を示すものである．そのため，これまで栽培できないとされた休眠覚醒に対する低温要求量の少ない品種でも，局所的な加温をクラウン部に実施することで，省コストで栽培できる可能性を示唆した．この結果は，寒冷地での新たな作型開発に貢献するものと考えている．
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