印度西高止山脉铁铁科植物的花粉形态。

Amalaurpava Mary Michael, Vijay Gopal Gumma
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引用次数: 1

摘要

花粉形态是鉴定属的重要工具。花粉形态数据可作为花粉学其他领域的参考,如过敏研究、花粉学、植被历史追溯、遗传和进化研究、气候变化研究等。用扫描电镜研究了铁铁科两属的花粉形态。孢粉学上的贡献在印度南部的铁铁科中仍然是零碎的。毛蕊花(Ehretia pubescens Benth)是一种属于毛蕊花科的小树,位于Chamundi山保护区森林的山脚下,该森林是Mysuru附近西部高山的一部分,而Cormona retusa (Vahl) Masam是一种灌木,在Chamundi山顶3400英尺处发现。对花粉进行乙酰化处理,扫描电镜观察花粉形态。本文对该地区铁铁科两属花粉形态的分类意义及其系统发育起源进行了研究。孢粉学证据表明,短毛假体花粉粒为三带共结和异带共结,金合欢花粉粒为三带共结,无假共结。两属都有凹形顶盖。孢粉学资料表明,这两个归化的分类群均为白垩系。短毛Ehretia pubescens和Cormona retusa属于两个不同的Ehretia谱系,可以通过花粉形态进行鉴定。花粉特征的多样性表明铁杉科属全花粉属。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Pollen morphology of selected taxa of Ehretiaceae from Western Ghats, India.
Pollen Morphology is an important tool in the identification of a genera. Data on pollen morphology is used as a reference in other fields of palynology like allergic studies, melissopalynology, tracing the history of vegetation, genetic and evolutionary studies, climate change studies etc. Pollen morphology of two genera of Ehretiaceae family is studied using Scanning electron microscope. Palynological contributions are still fragmentary in the family Ehretiaceae of southern India. Ehretia pubescens Benth is a small tree belonging to Ehretiaceae family located at the foothill of Chamundi hill reserve forest which is a part of Western ghat near Mysuru and Cormona retusa (Vahl) Masam is a shrub found 3400ft above on top of Chamundi Hill. Pollen grains were acetolyzed and Scanning Electron Microscopic studies conducted to obtain data on pollen morphology. The study is conducted to assess the taxonomic significance of pollen morphology in relation to their phylogenetic origin of the two genera of Ehretiaceae in the region. The palynological evidence shows Ehretia pubescens with tri-zonocolporate and heterocolpate pollen grains and Cormona retusa with tricolpate pollen grain without the pseudocolpi. Both genera have foveolate tectum. Palynological data indicate that these two naturalized taxa ie. Ehretia pubescens and Cormona retusa belong to two different lineage of Ehretia and can be identified by their pollen morphology. Diversity in the pollen characters points towards the eurypalynous nature in Ehretiaceae.
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