bordered pit (pair)

The results show that it is the aporate timber;ray is homeotype;growth ring sharp transforms from springwood to late wood,the zone of later wood is narrow;the size of tracheid molecule of springwood and late wood are different;bordered pit single row;the crossfield pit belongs to cryptomeripsoides;xylem ray single row.

朝鲜崖柏为柏科植物,应用光学显微镜和扫描电子显微镜对其茎次生木质部进行解剖学研究,发现其为无孔材;射线为同型;生长轮中早材至晚材急变,晚材带较窄,早晚材管胞分子大小差异极大;具缘纹孔单列;交叉场纹孔为杉木型;木射线单列。

The structure of the bordered pit membrane on the fir tracheid was studied through the observation using scanning electron microscope.

对于针叶材管胞的具缘纹孔膜构造,植物解剖学家们进行了很多研究,发现不同树种的纹孔结构、形态有很大不同,可将其作为科属特征,并对其进行了详细分类(Tsoumis,1965;周等,1990)。

In order to better understand the structure of the bordered pit membrane and Micropores on margo of Cunninghamia lanceolata.

为了弄清楚针叶材的具缘纹孔膜及其塞缘孔隙构造,本研究利用扫描电子显微镜对不同含水率杉木材(生材和气干材)及经过脱木素处理后的气干材管胞具缘纹孔膜进行了观察,获得了高质量的扫描电镜照片,对不同杉木材(生材和气干材)及经过脱木素处理后的气干材管胞具缘纹孔膜进行了系统的比较,研究表明: 1、生材杉木管胞具缘纹孔的纹孔塞没有特殊增厚,纹孔塞明显,纹孔塞至塞缘的厚度变化不明显或略明显。