关键词: 茄子, 品种, 盐胁迫, 耐盐性, 脯氨酸, 壮苗指数, 主成分分析, 隶属函数综合评价法

Abstract: With Round green eggplant(round,green eggplant),Xiuniang(long oval,purple black eggplant),Nongyou long eggplant(long shape,purple eggplant),Funong green eggplant(elliptical,green and white eggplant),Round purple eggplant(round,purple eggplant),No. 7 white eggplant(ellipse,white eggplant)those 6 eggplant varieties with different fruit types and fruit colors as test materials,and 120 mmol/L NaCl solution was used as stress condition to study the effect of salt stress on the morphological and physiological indexes of eggplant seedlings.Combined with principal component analysis and comprehensive evaluation method of membership function, the salt tolerance of eggplant varieties was evaluated so as to obtain the reliable indexes for salt tolerance screening.The results showed that the order of the comprehensive score of morphological and physiological indexes of each variety was consistent with the result of the comprehensive evaluation of membership function,and the salt tolerance order of the eggplant was Funong green eggplant>Nongyou long eggplant>No.7 white eggplant>Round green eggplant>Xiuniang>Round purple eggplant,which indicated that the salt tolerance of Funong green eggplant and Nongyou long eggplant was stronger, followed by No.7 white eggplant, Round green eggplant and Xiuniang,and Round purple eggplant was the weakest,proline content and seedling vigour index can be used as reliable indexes for rapid identification of eggplant salt tolerance,providing theoretical basis for utilization of eggplant salt tolerance germplasm resources.

Key words: Eggplant, Variety, Salt stress, Salt tolerance, Proline, Seedling vigour index, Principal , component analysis, Comprehensive evaluation method of membership function