Comprehensive evaluation on cold resistance of Liriodendron chinense from four provenances
Branches and leaf buds of four Liriodendron chinense provenances were collected both in autumn and winter to measure cold-resistant physiological indicators.Subordinate function analysis was used to evaluate the cold resistance of Liriodendron chinense provenances comprehensively.Cold-resistant physiological indicators of different provenances showed obvious seasonal variation,and had the same trend in the four provenances.Specifically,MDA content,soluble protein content,SOD activity,soluble sugar content,proline content of leaf bud in winter were higher than those in autumn;relative electric conductivity and water content in winter were lower than those in autumn.According to the measurement data of physiological indicators,subordinate function values of four provenances were calculated as the comprehensive evaluation values of cold resistance.The cold-resistant ability of four provenances was sorted as:Dabie shah (0.834) ＞ Fuyang (0.488) ＞ Liping(0.286) ＞Mengla (0.021).Correlation analysis showed that relative electric conductivity and water content had significantly negative correlation with the subordinate function value,while proline content had significant positive correlation with the subordinate function value.Therefore,these indicators can be used as suitable evaluation indicators.
plant physiologyLiriodendron chinensecold resistancephysiology indicatorsubordinate function
国家科技期刊平台
NSTL
万方数据
维普
