新疆杏抗寒力的鉴定

The Identification of Cold Hardiness of Apricot Trees of Xingjiang

以杏休眠期离体一年生枝为材料，电导法测定在不同连续梯度降温下细胞膜透性的变化规律，为验证其准确性将各处理的枝条进行水培．观察其枝条及芽眼的伤害和萌发情况。结果表明，细胞膜透性的变化以电解质的相对电导率表示，随处理温度下降而增高，当增高达一定高峰后则呈缓慢上升。新疆大多数品种在－２４℃至－２７℃时，电解质渗出率幅度明显剧增，其下限枝条严重伤害，萌芽极少，是抗寒性强弱的重要指标．

Conductivity test's samples are one-year-old woods.The results showed that the relative rate of conductivity of the electrolyte,which expressed the variation of cell membrane's permeation, increased when the treat temperature was dropped.The rate of eletrolyte efflux of most varieties of Xingjiang increased obviously when temperature was -24～-27℃.In this temperature the woods got seriously injured,and sprouted few buds.The rate of electrolyte efflux could be a important target of identifying cold hardiness.