本文对我国木兰科的39种木兰属和含笑属植物次生木质部的导管分子进行了初步分析。两属导管分子的长度和宽度略有差异。
This paper deals mainly with comparative studies on elements of secondary xylem in 39 species of Chinese Magnolia and Michelia.
植物区系有许多古老的类型，如木兰科、八角科等。
There are many ancient geographical elements, such as Magnoliaceae and Illiciaceae.
嫁接时间和砧木选择是影响木兰科植物嫁接成活率的主要因素，嫁接方法对成活率也有一定的影响。
Grafting time and kinds of stock are the major factors which affect the grafting survival rate of Magnoliaceae, but the grafting methods have less influence on the growth of the plants.
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