Effects of Two Signals on Flowering and FT Gene Expression in Off-season Longan  

作　　者：Lei ZHANG Zekang XU Shuqiang HE Ruixiong LUO 

机构地区：[1]Tropical Crops Genetic Resources Institute,Chinese Academy of Tropical Agricultural Sciences,Key Laboratory of Crop Gene Resources and Germplasm Enhancement in Southern China,the Ministry of Agriculture ,National Cultivar Improvement Center of Tropical Fruit Tree [2]College of Horticulture and Landscape Architecture,Hainan University

出　　处：《Agricultural Biotechnology》2016年第1期15-18,共4页农业生物技术（英文版）

基　　金：Supported by National Nonprofit Institute Research Grant of CATAS-TCGRI(1630032014017);Special Fund for Agro-scientific Research in the Public Interest(201003021);China Agriculture Research System(CARS-33-25)

摘　　要：[Objective] This study aimed to investigate the effects of two signals, H2O2 and NO, on flowering and FT gene expression in off-season longan. [ Method] Nine-year-old off-season longan ＇ Shixia＇ was used as the experimental material and sprayed with signal promoting agent and blocking agent to analyze the dynamic changes of flowering and FT gene expression level. [ Result] The expression level of FT gene in off-season longan increased during the flowering process, and the expression level of FT gene in leaves reached the peak earlier than that in terminal buds. SNP and MV treatments improved FT gene expression in varying degrees. DMTU and L-NNA treatments effectively inhibited FT gene expression in terminal buds, but the inhibitory effects on FT gene expression in leaves were not significant at late stage of flower bud differentiation. [Condusion] According to the flowering performance of longan, H2O2 and NO play an important role in promoting and accelerating longan flowering.[Objective] This study aimed to investigate the effects of two signals, H2O2 and NO, on flowering and FT gene expression in off-season longan. [ Method] Nine-year-old off-season longan ＇ Shixia＇ was used as the experimental material and sprayed with signal promoting agent and blocking agent to analyze the dynamic changes of flowering and FT gene expression level. [ Result] The expression level of FT gene in off-season longan increased during the flowering process, and the expression level of FT gene in leaves reached the peak earlier than that in terminal buds. SNP and MV treatments improved FT gene expression in varying degrees. DMTU and L-NNA treatments effectively inhibited FT gene expression in terminal buds, but the inhibitory effects on FT gene expression in leaves were not significant at late stage of flower bud differentiation. [Condusion] According to the flowering performance of longan, H2O2 and NO play an important role in promoting and accelerating longan flowering.

关 键 词：LONGAN FLOWERING H2O2 NO FT gene 

分 类 号：S667.2[农业科学—果树学] Q75[农业科学—园艺学]