Investigation of Petal Enlargement Mechanisms and Improvement of Cut Flower Quality Based on Substance Dynamics within Rose Plants

2023 Fiscal Year Final Research Report

• Project/Area Number: 21K05561
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 39030:Horticultural science-related
• Research Institution: Gifu University
• Principal Investigator: Yamada Kunio 岐阜大学, 応用生物科学部, 教授 (30345871)
• Project Period (FY): 2021-04-01 – 2024-03-31
• Keywords: バラ / 切り花 / 鑑賞期間 / 道管流速度 / 植物ホルモン

Outline of Final Research Achievements

Compared to flowers on the plant, cut roses have issues with a shorter period during which they can be enjoyed and incomplete blooming. Flowering is the phenomenon where petal tissue expands and lengthens due to the inflow of water into the petal cells, but the specifics of how water flows from the stem to the petals are not clear. In this study, we conducted a detailed analysis of the fluctuations in plant hormone content in the petals and the flow of water to the petals in relation to the movement of substances into the petals. The results of this study revealed differences in the fluctuations of plant hormone content in petals during flowering between rose flowers on the plant and cut flowers. It was also found that the flow of water in the pedicel of cut roses increases rapidly during the light period and is suppressed during the dark period, suggesting that water flows into the floral organs before significant petal growth caused by light exposure.

Free Research Field

園芸生理学

Academic Significance and Societal Importance of the Research Achievements

本研究により，バラ花弁成長に伴う植物ホルモン含量の変動および収穫後の切り花における開花に伴う水の変動の特徴について基礎的知見を得られたことから，今後切り花の冷蔵保管のあり方や前処理剤の添加方法について検討していきたい．さらに，市販の切りバラ用鮮度保持剤に代わる新たな切り花延命剤の開発につながる基礎的知見についても得られ，今後の応用研究につながることが期待される．