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当前位置: 首页 > 文章 > 杜鹃属植物孢粉学特性种内变异研究 安徽农业科学 2009,37 (18) 147-150+154
Position: Home > Articles > Study on Intraspecific Variation of Palynology Characteristics in Rhododendron Journal of Anhui Agricultural Sciences 2009,37 (18) 147-150+154

杜鹃属植物孢粉学特性种内变异研究

作  者：
周兰英;董平;彭家荣;蒋艾丽;何敏
单  位：
四川省会理县林业局;四川农业大学林学园艺学院
关键词：
杜鹃属;电镜扫描;花粉形态;种内变异
摘  要：
[目的]探究杜鹃属植物孢粉学特性种内变异情况。[方法]利用电子显微镜对四川西南山区不同区域采集的6种野生杜鹃共计15个花粉样本进行观察比较。[结果]杜鹃种内不同样本间单粒花粉形态、外壁颗粒大小及形状、四合体缝深浅、裂纹形态等性状上均表现出明显的一致性,并不因生长地域的变化和生态环境的差异而改变;四合体直径、萌发孔长宽在样本内变异幅度较大,极差达均值的25%以上;在种内不同样本间,四合体直径和萌发孔长宽差异多数达到显著或极显著水平。[结论]杜鹃花粉四合体大小和萌发孔长宽不像外壁纹饰那样稳定,在样本内往往会出现较大变异,在同种不同样本间出现显著或极显著差异,因此这些孢粉学性状不宜作为杜鹃分类的主要指标。
译  名：
Study on Intraspecific Variation of Palynology Characteristics in Rhododendron
作  者：
ZHOU Lan-ying et al(College of Forestry and Horticulture,Sichuan Agricultural University,Yaan,Sichuan 625014)
关键词：
Rhododendron;Scanning by electron microscopy;Pollen morphology;Intraspecific variation
摘  要：
[Objective] The study aimed to explore the intraspecific variation of palynology characteristics in Rhododendron.[Method] The total of 15 pollen samples of 6 wild Rhododendron collected from different part of Sichuan southwest area were observed and compared by electron microscope.[Result] Pollen morphology of single grain,shape and size of exine grain,gap depth of tetrad and the shape of crackle indicated a high degree of coherence among different samples in one species of Rhododendron and didn't alter because of the change of growth region and difference of ecological environment.Diameter of tetrad,length and width of germ pore had the large amplitude of variation between samples,whose extreme difference was more than 25% of mean value.The difference of tetrad diameter and length and width of germ pore reached the significant or extremely significant level in different samples of a species.[Conclusion] The diameter of tetrad and length and width of germ pore in Rhododendron pollen was no as stable as that of exine ornamentation,often had greater variation in samples and showed a significant or extremely significant diffrence in different samples of same species,so,theses palynology characteristics were not appropriate as main classified indicators for Rhododendron.

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