2011 Fiscal Year Final Research Report

Temperature and gene expression analysis of the percentage of ray floret and disk floret in chrysanthemum

Research Project

Project/Area Number	21780032
Research Category	Grant-in-Aid for Young Scientists (B)
Allocation Type	Single-year Grants
Research Field	Horticulture/Landscape architecture
Research Institution	National Agriculture and Food Research Organization
Principal Investigator	NAGASUGA Kaori 独立行政法人農業・食品産業技術総合研究機構, 東北農業研究センター・畑作園芸研究領域, 主任研究員 (30370612)
Project Period (FY)	2009 – 2011
Keywords	キク / 花序構成 / 管状花 / 舌状花 / 温度 / 花芽発達段階 / 遺伝子断片
Research Abstract	Effects of temperature and gene expression related to the number and percentage of ray floret and disk floret were investigated. The percentage of disk floret was increased by high temperature in summer-to-autumn flowering type chrysanthemum,'Iwa-no-hakusen', and decreased by low temperature in autumn flowering type chrysanthemum,'Jinba' and small flowering type chrysanthemum,'Natsuko'. Specific fragments expressed under the temperature condition and the flower development stage related to the formation of disk floret were isolated. The sequence and the homology search of these fragments were investigated.