Micromorphological observations on leaf and pollen of Capparis L. sect. Capparis (Capparaceae)
Micromorphological observations on leaf and pollen of Capparis L. sect. Capparis (Capparaceae)
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DOI：
10.1080/11263500412331283753
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发表时间：
2004-07-01
期刊：
影响因子：
2
通讯作者：
Fici, S
中科院分区：
文献类型：
--
作者：
Fici, S
教派。 Capparis 以单一物种 Capparis spinosa L. 为代表，分为几个在旧大陆表现出类似特征和不连续分布的种内类群。通过扫描电镜和光学显微镜观察研究了整个组的叶表面和花粉特征。该部分的特征是简单的毛发、网状至波状的角质层、被造口边缘包围的无细胞气孔以及三区扁长的花粉粒。毛被的特征似乎是恒定的，而所研究的分类群在角质层图案和气孔尺寸方面有相当的差异，并且在花粉大小和外壁表面上显示出细微的差异。这种微形态学证据，加上其他表型特征，支持该部分位于古热带地区山柑属的底部。考虑到该群体显着的地理分离和共形，还讨论了其生物地理学和系统方面。
Sect. Capparis is represented by a single species, Capparis spinosa L., divided into several intraspecific taxa showing plesiomorphic features and disjunct distributions in the Old World. Leaf surface and pollen features were investigated in the whole group by SEM and light microscope observations. The section is characterized by simple hairs, a reticulate to undulate cuticle, anomocytic stomata surrounded by a peristomal rim, and trizonocolporate, prolate pollen grains. The characteristics of the indumentum appear constant, while the studied taxa are fairly differentiated with respect to cuticular patterns and dimensions of the stomata, and show slight differences in pollen size and exine surface. This micromorphological evidence, coupled with other phenotypic features, supports the placement of this section at the base of the genus Capparis in the palectropical area. Considering the striking geographic disjunction and symplesiomorphies of the group, its biogeographical and systematic aspects are also discussed.