几个仁用杏品种枝条组织结构与抗寒性关系的初步研究

对4个杏树品种（优一、白玉扁、一窝蜂和龙王帽）的一年生枝条和二年生枝条进行了解剖构造的观察和测量,并对其相对电导率进行了测定,结果表明：枝条的木质部比率与抗寒性（相对电导率）成正相关,相关系数为0.9542。反之,皮层比率与抗寒性成反相关,相关系数达－0.8221。可以把木质部和皮层在茎的结构中所占比率作为抗寒性的形态结构鉴定指标之一。

Study on the shoot tissue structure of apricot varieties in relation to cold resistance

The anatomic structure of the annual shoot and the biannual shoot in 4 kinds of apricots have been studied, and the relative electrolyte leakage have been determined. The experimental results pointed out that the ratio of the thickness of xylem to the whole thickness of shoot was in positive correlation with the cold hardiness, r =0.954 2 * . Conversely, the ratio of the thickness of cortex was inversely correlative with the cold resistance, r =-0.822 1 * .The characteristics in shoot tissues could be one of the criteria of cold resistance of apricots.