孔纹导管

结果表明：骏枣、梨枣和苹果的导管细胞均为孔纹导管类型；

The result indicated that : Vessel cells of Jun - , Li-jujube and the apple were the pitted vessel type ;

次生木质部由孔纹导管、薄壁组织及射线所组成。

Secondary xylem consists of pitted vessels , parenchyma fibers and rays .

粉末中棕黄色木纤维、螺纹导管和孔纹导管等为其主要鉴定特征。

The major characteristic for identification is the brown-yellow fibre , screw pipes and pipes with holes in the powder .

研究明确了品种耐虫性与韧皮部筛管、木质部孔纹导管的横切面面积数量有关。

It indicated that tolerant characteristics of varieties had related to TSA of phloem sieve tubes and xylem conduits . 3 .

在扫描电镜下，观察到5个桃品种和2个苹果品种枝条的次生木质部解离后的导管细胞，桃为螺纹导管型，苹果为孔纹导管型；

Under the electronic , the vessel cell after separation of the secondary xylem of the outgrowth of five varieties of the peach and two varieties of the apple was clearly observed .

结果表明：（1）各供试品种导管分子均为孔纹型导管。

The results indicate : ( 1 ) The vessel cells of the supplied test varieties are all the pitted vessel .

结果表明：较进化的树种，一般都是孔纹和网纹导管，较原始的树种，一般都是环纹和螺纹导管；

The results as follow : on the whole , the more evolutional species are all pitted vessel and reticulate vessel ;