Wood anatomy of the vanguerieae (Ixoroideae-Rubiaceae), with special emphasis on some geofrutices
Wood anatomy of the vanguerieae (Ixoroideae-Rubiaceae), with special emphasis on some geofrutices
复制标题
vanguerieae (Ixoroideae-Rubiaceae) 的木材解剖学，特别强调一些 geofrutices
DOI：
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发表时间：
2000
期刊：
影响因子：
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通讯作者：
E. Smets
中科院分区：
文献类型：
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作者：
F. Lens;S. Jansen;E. Robbrecht;E. Smets
先锋族是一个由27属约500个物种组成的部落。虽然这个部落主要分布在非洲和马达加斯加，但Vanguerieae也出现在热带亚洲，澳大利亚和太平洋岛屿。通过光学显微镜和扫描电子显微镜观察，对15属34种木材进行了详细的木材解剖学描述。次生木质部在整个族中是均匀的，并且非常适合Ixoroideae s.l.。轴向薄壁组织以纤维管胞为基础，由散生到散聚。Vanguerieae包括许多geofrutices，其特征在于大量木质分枝或不分枝的地下部分和轻微分枝的不分枝的地上小枝。地纹的地下结构并不同源;在三个物种（Fadogia schmitzii、Pygmaeothamnus zeyheri和Tapiphyllum cinerascens var.）中发现了中央髓。laetum），而Fadogiella stigmatoloba显示中央初生木质部，这是根的特征。地下与地上木材的比较表明，在导管直径和薄壁组织和纤维的数量的解剖差异。
The Vanguerieae is a tribe consisting of about 500 species ordered in 27 genera. Although this tribe is mainly represented in Africa and Madagascar, Vanguerieae also occur in tropical Asia, Australia, and the isles of the Pacific Ocean. This study gives a detailed wood anatomical description of 34 species of 15 genera based on LM and SEM observations. The secondary xylem is homogeneous throughout the tribe and fits well into the Ixoroideae s.l. on the basis of fibre-tracheids and diffuse to diffuse-in-aggregates axial parenchyma. The Vanguerieae include numerous geofrutices that are characterised by massive woody branched or unbranched underground parts and slightly ramified unbranched aboveground twigs. The underground structures of geofrutices are not homologous; a central pith is found in three species (Fadogia schmitzii, Pygmaeothamnus zeyheri and Tapiphyllum cinerascens var. laetum), while Fadogiella stigmatoloba shows central primary xylem which is characteristic of roots. Comparison of underground versus aboveground wood shows anatomical differences in vessel diameter and in the quantity of parenchyma and fibres.