High temperature response of chlorophyll fluorescence parameters and heat tolerance evaluation of different grape cultivars
[Objective]This study investigated high temperature response of chlorophyll fluorescence of different grape cultivars and evaluated heat tolerance for 19 grape cultivars to provide basis for breeding heat tolerant grapes and studying heat tolerant mechanisms of grapes in Turpan.[Method]A total of 19 grape varieties from Turpan Research Institute of Xinjiang Academy of Agricultural Sciences were selected.The chlorophyll fluorescence characteristic parameters including F0、Fm、Fv/F0、Fv/Fm、PIABS、DI0/CS0、ΦPSⅡ、φE0、ETR、and qP in leaves of grape were determined by rapid fluorescence detector(Handy-PEA)under the natural high temperature condition in Turpan.The responses of these parameters to high temperature were analyzed and compared among different grape cultivars.The fuzzy membership function analysis method and the sample optimal segmentation clustering method were then used to evaluate the heat tolerance.[Result]The chlorophyll fluorescence parameters of all 19 cultivars were affected significantly by high temperature with decreased light energy transformation rate.The comprehensive scores were in the order of'Manicure finger'>'Yatomi Rosa'>'Jintianmi'>'Red Globe'>'Jintian Meigui'>'Fujiminori'>'Hongqi Tezaomeigui'>'Thompson Seedless'>'Hetianhuang'>'Jumeigui'>'Crimson Seedless'>'Beta'>'Kyoho'>'Munage'>'Cardinal'>'Victoria'>'Rizamat'>'Centennial Seedless'>'Shuijing Wuhe'.The sample optimal segmentation clustering method with classification standard showed that'Manicure finger','Yatomi Rosa','Jintianmi','Red Globe','Jintian Meigui'and'Fujiminori'had strong heat tolerance.[Conclusion]Six grape varieties with strong heat tolerance suitable for cultivation in Turpan area were selected.
grape cultivarschlorophyll fluorescence parameterhigh temperature responseheat tolerance
NETL
NSTL
万方数据
维普
