2023 Fiscal Year Final Research Report
Transcriptome Analysis for the Elucidation of the Mechanism of Premature Fruit Drop in Passion Fruit
| Project/Area Number |
21K05582
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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 | Tokyo University of Agriculture |
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Principal Investigator |
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| Project Period (FY) |
2021-04-01 – 2024-03-31
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| Keywords | パッションフルーツ / 熱帯果樹 / 生理的落果 / RNA-Seq解析 / エチレン / オーキシン / 細胞壁 |
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| Outline of Final Research Achievements |
Premature fruit drop (PmFD) is a problem in passion fruit production. Research to elucidate the mechanism of PmFD was conducted.
RNA-Seq analysis was employed to comprehensively determine and compare the amount of gene expression in the abscission zone during the periods when PmFD occurred and when PmFD did not occur. The results suggest that an increase in ethylene production during passion fruit maturation leads to a decrease in cell wall constituents and cell wall structural function, resulting in the disintegration of cells at the abscission zone, which in turn causes FD. Moreover, cultivar difference in the susceptibility to ethylene existed, and the cultivar responding to a very little amount of ethylene is prone to PmFD.
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| Free Research Field |
果樹園芸学
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| Academic Significance and Societal Importance of the Research Achievements |
我が国の熱帯果樹研究は，地球温暖化に対応するためマンゴー、パッションフルーツ、チェリモヤ、レイシなど熱帯・亜熱帯果樹の栽培普及の必要性から、栽培法の改善についての研究が多くなされてきた。その中で，開花直後の「落花」を抑え着果安定を図るために，施設内温度と花器の発達異常，花粉発芽率、雌しべ受容性など解剖学的，生殖生理学的研究がなされ世界の果樹研究に貢献してきた。
本研究は、分子生物学的手法によって成熟前落果に関わる物質を特定し、それらの物質への感受性の品種間差異を示した点で学術的意義がある。また、これらの知見は低酸度で高品質なパッションフルーツ生産に貢献する可能性がある。
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