Abstract:By comparing the differences in tissue anatomy, membrane permeability and endogenous hormones of different varieties of soft jujube Actinidia Arguta during natural wintering, the adaptability of soft jujube Actinidia Arguta to low temperature was discussed.To provide a theoretical reference for the breeding and identification of cold-resistant varieties of soft jujube Actinidia Arguta . The experimental materials of 5a raw soft jujube Actinidia Arguta varieties "Quilv", "Fenglv" and "96-6" were used to determine the anatomical structure, cell membrane permeability and endogenous hormones GA3,ABA and IAA during wintering. Change,The aim is to determine the adaptability of the different varieties of soft jujube kiwi during cold winter and its intrinsic mechanism.【Results】(1) The ratio of xylem from large to small is: "Quilv", "96-6", "Fenglv", and the cortical ratio is "Fenglu", 96-6", Kuilu", and The opposite trend is that the " Quilv " anatomy is significantly different from the other two varieties. (2) During the test period, the relative conductivity and MDA content of the soft jujube Actinidia Arguta increased first and then decreased with temperature, and reached the highest in the lowest temperature in January.Among them, " Quilv " has the smallest change in relative conductivity and MDA content, while ‘Fenglv’ is greatly affected by low temperature. (3) With the decrease of natural temperature, the content of GA3 and IAA decreased gradually from November to January, and the ABA content gradually increased;From January to February, with the gradual increase of temperature, the content of IAA and GA3 of three varieties of soft jujube nectarine increased gradually, and the ABA content decreased gradually, and reached the highest or lowest value in January. The low temperature has a great influence on the tissue anatomy, membrane permeability and endogenous hormones of three soft jujube Actinidia Arguta varieties. Compared with "Fenglv" and "96-6", " Quilv " Strong cold resistance.