Abstract: The changes of morphology, physiology and biochemistry of eggplant rootstock seedlings were studied under low temperature stress, with Jinong 2000 as control. The results showed that these materials tested were sensitive to low temperature stress in the primary period of treatment. For instance, such indexes as chilling injury index, leaf electrolytic leakage, MDA content and SOD activity improved fast, and such indexes as POD activity, CAT activity, AQY, photosynthetic rate, Fv/Fm and ФPSⅡ decreased quickly. Subsequently, leaf protective enzyme activity, photosynthetic rate and Fv/Fm increased gradually. With the prolonging time of low temperature stress, leaf protective enzyme activities and photosynthetic rate decreased, but the degree of decrease of Torvum and Hiranasu were slight and their activities still kept at a higher level. The result of comprehensive screening showed that the chilling tolerance of Torvum and Hiranasu was better, Jinong 2000 was the lowest, Daidaro and Taibyo VF were in the middle in this study.

Key words: Eggplant rootstock, Protective enzyme activity, Chlorophyll fluorescence parameters, Photosynthesis parameters, Chilling tolerance