摘要
本文介绍了扫描电镜和透射电镜下交叉场纹孔在管胞一侧和射线薄壁细胞一侧的形态特征及其变化细节。扫描电镜下管胞胞腔一侧交叉场纹孔口周围形成的光晕。在柳杉(Cryptomerisfortunei Hooibrenk ex Otto et Dietr.)木材中首次看到管胞一侧的交叉场纹孔膜具辐射状排列的微纤丝或束;西藏长叶松(Pinus roxburghii Sarg.)的松木型纹孔膜的边缘具辐射状排列的微纤丝束。此外,尚在臭冷杉[Abies nephrolepis(Trautv.)Maxim]木材中观察到一种特殊的纹孔口外展的杉木型纹孔,并在冷杉属(Abies)其他种、落叶松属(Larix)一些种及红皮云杉(Picea koraiensis Nakai)等木材的交叉场纹孔中也看到。
This paper gives a detailed description on the morphological characteristics and varia- tions of cross-field pit on the tracheid side and the ray parenchyma cell side under SEM and TEM.There are usually formed a light color halo around the pit aperture of cross-field on the tracheid lumen side under SEM.The paper reports the ultrastructure and radial pat- tern of microfibrils or microfibril strands on the tracheid side of the cross-field pit membra- ne in the wood of Cryptomeria fortunei Hooibrenk ex Otto et Dietr.The pinoid pit membra- ne of Pinus roxburghii Sarg.shows the radial microfibril strands only at the margin of mem- brane.Meanwhile,authors have found a very special type of taxodioid pit with extended aperture in Abies nephrolepis(Trautv.)Maxim.as well as in some other species of the gen- era:Abies,Larix and Picea koraiensis Nakai.
基金
中国科学院基金资助课题
