Comparison of cold resistance among 4 grapevine cultivars

【Objective】To study the differences of cold resistance among grape cultivars and select wine va-rieties with good cold resistance.【Methods】The shoots of three introduced wine grape cultivars‘Beibing-hong',‘Zuoyouhong',‘Double Red'and local major cultivar‘Cabernet Sauvignon'were used as exper-iment materials. The relative conductivity,soluble sugar,soluble protein,proline,malondialdehyde,su-peroxide dismutase,peroxidase and catalase activity of different cultivars were measured after low temper-ature treatment. The semi lethal temperatures of the tested cultivars were calculated by the conductancemethod with application of Logistic equation,and the cold resistance of different cultivars was comparedwith variance and principal component analysis.【Results】The results showed that the relative conductivi-ty and MDA content of 4 cultivars increased with the decrease of temperature,and the activity of SOD,content of soluble sugar and proline increased first and then decreased. CAT activity and soluble proteincontent kept increase,while POD activity decreased.【Conclusion】Through principal component analy-sis,the order of cold resistance of 4 cultivars was‘Double Red'>‘Zuoyouhong'>‘Beibinghong'>‘Cabernet Sauvignon',which could provide reference for introduction and cultivation management ofwine grape.