POLLEN MORPHOLOGY OF THE ROSACEAE OF WESTERN CANADA .1. AGRIMONIA TO CRATAEGUS
POLLEN MORPHOLOGY OF THE ROSACEAE OF WESTERN CANADA .1. AGRIMONIA TO CRATAEGUS
复制标题
DOI：
10.1080/00173138809432836
复制
发表时间：
1988-01-01
期刊：
影响因子：
0.9
通讯作者：
SMITH, BM
中科院分区：
文献类型：
--
作者：
HEBDA, RJ;CHINNAPPA, CC;SMITH, BM
本文对加拿大西部蔷蔷花科的Agrimonia、Alchemilla、Amelanchier、Aruncus、Chamaerhodos和creataegus属的花粉粒进行了系统的SEM和LM研究。上述属在单胞体中有三聚蜜状的花粉粒。在垂直于柱头的方向上，有明显的条纹雕刻。除柱头区为微针状外，西方炼金草花粉为束状。鞘间的外壁增厚。黄花楸花粉很小，呈粗条纹状。直立Chamaerhodos花粉具有突出的孔区，孔上有纺锤状的被盖。雕塑由一块块短脊组成。山楂属和Amelanchier属的花粉在打开时具有典型的赤道桥或瓣。晶粒的尺寸随膨胀的程度而变化。无叶Amelanchier alnifolia花粉具有地理变异性。原产于北美的山楂属植物：C. douglasii、C. rotundifolia和C. succulenta的花粉表现出形态上的差异，需要进一步研究。在目前的调查中，表面雕刻是最显著的特征，结合孔隙面积的特征，似乎可以区分类型。一个特征表允许大多数分类群的花粉用LM和SEM进行鉴定。
This paper begins a systemic SEM and LM study of the pollen grains of the Rosaceae in Western Candada with genera Agrimonia, Alchemilla, Amelanchier, Aruncus, Chamaerhodos, and Crataegus. The above genera have tricolporate-tectate pollen grains in monads. Agrimonia gryposepala and A. striata have distinct striate sculpturing perpendicular to the colpus. Alchemilla occidentalis pollen is psilate except in the colpus area which is microechinate. The exine is thickened in the intercolpium. Aruncus sylvester pollen is very small and exhibits a coarsely striate sculpture. Chamaerhodos erecta pollen has a charcteristic protruding pore area with a fusiform operculum over the aperture. The sculpturing consists of patches of short ridges. Crataegus and Amelanchier pollen have pores with a characteristic equatorial bridge or flaps when open. Dimension of the grains vary with degree of distension. Amelanchier alnifolia pollen exhibits geographic variability. Native North American Crataegus species: C. douglasii, C. rotundifolia and C. succulenta have pollen which exhibits morphological variability and requires more study. In the survey so far, surface sculpturing is the most distinctive feature and, in combination with characteristics of the pore area, seems to distinguish the types. A table of charcters permits the pollen of most taxa studied to be identified using LM and SEM.