测定了徐州市引种的乐昌含笑(Michelia chapensis) 、杨梅(Myrica rubra)、香橼(Citrus medica)、月桂(Laurus nobilis) 、茶梅(Camellia sasangua)、杜英(Elaeocarpus decipiens)、弗吉尼亚栎(Quercus virginiana) 、柑橘(Citrus reticulata)等8种常绿阔叶树种越冬进程中叶片叶绿素含量、质膜相对透性、丙二醛含量、可溶性糖含量、超氧化物歧化酶活性、过氧化物酶活性等生理指标的变化。结果表明:8个树种叶片的叶绿素含量随越冬进程降低;质膜相对透性、丙二醛含量和可溶性糖含量均随越冬进程而升高;8个树种叶片SOD和POD活性的变化没有统一规律。8种引种常绿阔叶树种中,茶梅在徐州地区表现抗寒性较强,适宜本地种植;弗吉尼亚栎、月桂、杨梅抗寒能力一般,需要进一步驯化;杜英、乐昌含笑、香橼、柑橘抗寒能力差,不适合在徐州地区引种栽培。

Eight evergreen broad-leaf tree species such as Michelia chapensis,Myrica rubra,Citrus medica,Laurus nobilis,Camellia sasangua,Elaeocarpus decipiens,Quercus virginiana and Citrus reticulate were used as experimental materials.The chlorophyll content,plasma membrane relative permeability,malondialdehyde content,soluble sugar content,the activity of superoxide dismutase and peroxidase were measured during the wintering period in order to study their ability to overwinter in the Xuhuai region .The main results are as follows:The chlorophyll content of the eight tree species decreased,and the leaf relativity membrane permeability,malondialdehyde content and soluble sugar content increased with decreasing temperature.The SOD activity and POD activity did not change uniformly.Among the eight introduced evergreen broad-leaved tree species,Camellia sasangua has strong cold resistance in Xuzhou region and is suitable for local planting.Quercus virginiana,Laurus nobilis and Myrica rubra have general cold resistance and need to be further domesticated.Elaeocarpus decipiens,Michelia chapensis,Citrus medica and Citrus reticulata have poor cold resistance and are not suitable for introduction and cultivation in Xuzhou region.