Elucidation and application of the molecular mechanism for vegetative to reproductive phase transition in cultivated strawberry

2022 Fiscal Year Final Research Report

• Project/Area Number: 19K06031
• 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: Nagoya University
• Principal Investigator: Matsumoto Shogo 名古屋大学, 生命農学研究科, 教授 (90241489)
• Co-Investigator(Kenkyū-buntansha): 太田垣 駿吾 名城大学, 農学部, 准教授 (50597789)
• Project Period (FY): 2019-04-01 – 2023-03-31
• Keywords: 園芸学 / 野菜 / イチゴ / 花芽分化 / 促成栽培 / バイオマーカー

Outline of Final Research Achievements

In strawberry forcing cultivation, it is important to identify the flower bud differentiation time for early fruit harvesting. In this study, we found FaFT3, FaAP1, GID1 and so on related to floral meristem induction, FaTFL1-1, PHYA and so on related to floral meristem suppression, which are universal to cultivated strawberries. We performed detailed structural and functional analysis of FaFT3, which works centrally. Biomarkers that can identify the time of flower bud differentiation were selected from a group of genes whose expression fluctuates in leaves in conjunction with the flower bud differentiation tissue; the crown shoot apex. In addition, it was shown that low-temperature plasma treatment may promote the flower bud differentiation time and advance the harvest time.

Free Research Field

園芸学、分子生物学

Academic Significance and Societal Importance of the Research Achievements

複数の食用栽培イチゴを用い、栄養成長から生殖成長への転換時に普遍的に働く遺伝子群を特定して構造、発現、機能解析を行い、転換機構の一端を明らかにした。クラウン茎頂部位の花芽分化時期を特定できるバイオマーカーを葉組織にて特定し、苗を損ねることなく花芽分化時期を特定できる道を開いた。低温プラズマ処理による花芽分化時期の促進ならびに収穫期の前倒しの可能性についても示された。