关键词: 番茄砧木, 茄子嫁接苗, 热激处理, 热害指数, SOD, MDA, 生理特性

Abstract: To investigate the resistance of eggplant seedlings grafted with different tomato rootstocks to high temperature stress,four different tomato varieties(Jinpeng No.1,Dahongxiaoguo,Fenguozhongguo,Xiaoyingtao,named as T₁,T₂,T₃,T₄,respectively) were selected as rootstocks for Datianlvfeng eggplant.After normal temperature and heat shock, the effect of four different tomato stocks on physiology and heat tolerance of grafted eggplant was studied by determining the height,stem diameter,number of leaves,plant type,heat injury index,SOD activity,MDA and chlorophyll contents,electrolyte leakage rate at seedling stage.The results showed that the height,plant type and leaf number of eggplant grafted with different tomato varieties did not change significantly compared with self-root seedlings; the electrolyte leakage rate and MDA content of eggplant seedlings grafted with different tomato varieties decreased significantly compared with self-root seedlings; the chlorophyll content increased, the T₁,T₂,T₃were significantly higher than that of self-root seedlings; the SOD activity increased,the T₁,T₃were significantly higher than that of self-root seedlings,the T₃ increased by 53.31%;the heat damage index was the lowest after T₃ grafting, only 21.67%.Comprehensive analysis showed that the grafted eggplant seedlings with Fenguozhongguo(T₃) tomato as rootstock showed high heat resistance.

Key words: Tomato stocks, Grafted eggplant, Heat shock treatment, Heat injury index, SOD, MDA, Physiological characteristics