2022 Fiscal Year Final Research Report
Development of a method to reduce the occurrence of open centers based on the mechanism of dahlia open centers development
Project/Area Number |
19K06019
|
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 | Okayama University |
Principal Investigator |
Goto Tanjuro 岡山大学, 環境生命科学学域, 教授 (40195938)
|
Co-Investigator(Kenkyū-buntansha) |
田中 義行 京都大学, 農学研究科, 准教授 (20704480)
|
Project Period (FY) |
2019-04-01 – 2023-03-31
|
Keywords | 露芯花 / 発育ステージ / 舌状花 / 管状花 / 夜温 / AGAMOUS(AG)-like / CYCLOIDEA2(CYC2)d |
Outline of Final Research Achievements |
Regarding open centers occurring in summer, previous studies have shown that night cooling at 20℃ increases the number of ray florets and reduces the rate of open centers development.It was suggested that the occurrence of open center could be suppressed even at a night temperature of 25°C. The results showed that there were significant differences in the expression levels of the CYCLOIDEA2(CYC2)d and AGAMOUS(AG)-like genes between treatments during the late developmental stage. CYC2d was more highly expressed in the low temperature treatment and AG-like was lower expressed in the low temperature treatment compared to the high temperature treatment.
|
Free Research Field |
花卉園芸学
|
Academic Significance and Societal Importance of the Research Achievements |
ダリアの露芯花に関する研究は,古くから現在に渡って行われているが,抜本的な解決策は見つかっていない.これまでに行われてきた研究は,基本的には低温短日期の発生を長日処理で抑制する方法の開発であり,高温長日期の発生を抑制する研究はほとんど見られない.また,植物成長調節物質散布で舌状花と管状花数が変動する文献も見られない.ダリアは周年生産されるため,高温長日期に舌状花数を増やし,露芯花の発生を軽減する方法を見出す必要がある.
|