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作 者 ：韩丽娟 林月惠 吴树明

期 刊 ：植物学通报 2001年 18卷 03期 页码：375-377

关键词：鹅掌楸；次生木质部；纬度；

摘 要 ：对生长在北纬23至32度的鹅掌楸〖WTBX〗（Liriodendron chinense〖WTBZ〗 Sarg.）的次生木质部进行了比较解剖学研究。观察的特征有：导管分子的长度、直径、壁厚、梯状穿孔板横闩的数目；导管密度、纤维长度、直径、壁厚；射线的高度、宽度，单列射线的比例，射线的密度等。结果表明，随着纬度的增加，导管分子变短变细，壁变薄，梯状穿孔板的横闩数目减少；纤维也变短变细，壁变薄；木射线变矮变窄，单列射线的比例和射线密度增加。

Abstract:This paper reports a comparative anatomical study of the secondary xyl em of Liriodendron chinense Sarg. growing in lat 23°～32°N. A detailed description is given of the characteristics of the secondary xylem in L. chinense Sarg.,including vessel element and fibre lengths, diameters, wall ticknesses, the number of bars of perforation plate,the density of versels,the height, width and density of rays,and ratio of uniseriate rays.It is shown that with the increase of latitude, vessel elements and fibres become thinner and shorter, vessel and fibre walls become thinner in early wood and late wood,the number of bars of perforation plate decreases, rays become shorter and narrower, the ratio of uniseriate rays and the density of rays increase in secondary xylem.

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