摘要
首次报道了兰科的手参属Gymnadenia国产 5种植物花粉形态的研究结果 ,并与邻近的兜被兰属Neottianthe花粉进行了对比研究。前者花粉小块形状大多不规则 ,少数为三棱锥体形 ;而后者花粉小块大多形状为三棱锥体形 ,少数形状不规则。手参属花粉外壁表面具很细微的小穿孔、皱波状 ,小穴和小穿孔与沟渠状纹饰共存 ,或沟渠状等 ;而兜被兰属外壁表面纹饰明显 ,具有 5种类型 :( 1 )小穿孔 ,( 2 )表面近光滑 ,( 3)沟渠状 ,( 4 )拟网状 ,( 5)典型的网状纹饰。手参属花粉表面具粘丝 ,而兜被兰属花粉表面没有发现粘丝。此外 ,本文还探讨了手参属和兜被兰属两属花粉在分类学上的意义。
WT5BZ] Pollen morphology of five species from China in the genus Gymnadenia R. Br.(Orchidaceae) was investigated in this work. Pollen characteristics of this genus were compared to those of its closely related genus, Neottianthe Schltr. It is found that there are some differences of pollen morphology between the two genera, e.g.: (A) Pollen massulae are mostly irregular less frequently trigonous conical in Gymnadenia, while mainly trigonuus conical less frequently irregular in Neottianthe; (B) Ornamentation of pollen exine surface is usually indistinct, but microperforate, microrugulate, microfoveolate or both microperforate and microfossulate in high magnification in Gymnadenia, but more distinct in Neottianthe. Exine ornamentation of this genus can be divided into five types, (1) almost smooth, or very obscurely fosset, (2) perforate, (3) fossulate or foveolate, (4) reticuloid, (5) typically reticulate. (C) the surface of pollen massulae in Gymnadenia possess viscin thread, but that in Neottianthe does not. The result of this work supports the separation of Neottianthe from Gymnadenia as an independent genus. [WT5HZ]
出处
《植物分类学报》
CSCD
2000年第2期137-140,共4页
Acta Phytotaxonomica Sinica
基金
中国科学院生物分类区系学科特别支持费资助课题
关键词
花粉形态
手参属
兰科
WT5BZ]Pollen morphology
Gymnadenia R. Br.
