Indicator Analysis of Off-season Longan Flower Reversal  

作　　者：Ziqin YANG Lei ZHANG Jiwang HONG Songgang LI 

机构地区：[1]National Cultivar Improvement Center of Tropical Fruit Tree,Danzhou 571737,China [2]State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources,Guangzhou 510642,China

出　　处：《Agricultural Biotechnology》2018年第5期16-19,22,共5页农业生物技术（英文版）

基　　金：Supported by State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources(SKLCUSA-b201601);Non-profit Research Institution Reform Start-up Fund for Tropical Crop Germplasm Research Institute,Chinese Academy of Tropical Agricultural Sciences(pzsfyl-201804);China Agriculture Research System(CARS-33-27)

摘　　要：[Objectives] This study was conducted to analyze the internal causes of flower reversal in Longan （ Dimocarpus longan Lour.） trees. [Methods] With flowering trees and flower reversal trees as experimental materials, the variations in sugar and starch in mature leaves, tender leaves, mature branches, twigs and terminal buds after flower forcing were analyzed. [Results] During flowering process, sugar content showed the greatest difference between flowering and flower reversal trees, and the difference was the greatest in mature leaves. Trees with mature leaves having a sugar content above 44.71 mg/g were found to be more prone to flowering, while those with leaf sugar content lower than 27.80 mg/g were susceptible to flower reversal. In addition, longan trees with a higher sugar content in tender leaves were not prone to flower reversal. [Conclusions] In future, whether off-season flower forcing can be performed on longan trees could be judged through the detection of tree leaves, which is of great significance to prevention of flower reversal in off-season longan production.[Objectives] This study was conducted to analyze the internal causes of flower reversal in Longan （ Dimocarpus longan Lour.） trees. [Methods] With flowering trees and flower reversal trees as experimental materials, the variations in sugar and starch in mature leaves, tender leaves, mature branches, twigs and terminal buds after flower forcing were analyzed. [Results] During flowering process, sugar content showed the greatest difference between flowering and flower reversal trees, and the difference was the greatest in mature leaves. Trees with mature leaves having a sugar content above 44.71 mg/g were found to be more prone to flowering, while those with leaf sugar content lower than 27.80 mg/g were susceptible to flower reversal. In addition, longan trees with a higher sugar content in tender leaves were not prone to flower reversal. [Conclusions] In future, whether off-season flower forcing can be performed on longan trees could be judged through the detection of tree leaves, which is of great significance to prevention of flower reversal in off-season longan production.

关 键 词：Dimocarpus longan Flower induction flower reversal STARCH SUGAR 

分 类 号：S667.2[农业科学—果树学] X172[农业科学—园艺学]