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中国新疆百合科16种植物的孢粉学特征及其分类学意义

Palynological features and taxonomic significance for 16 species of (Liliaceae) from Xinjiang, China.

作者信息

Lin Musen, Qiu Juan, Xie Kaiqing, Tan Dunyan

机构信息

College of Life Sciences, Xinjiang Agricultural University, Ürümqi 830052, China Xinjiang Agricultural University Ürümqi China.

出版信息

PhytoKeys. 2023 Apr 21;225:53-68. doi: 10.3897/phytokeys.225.101518. eCollection 2023.

Abstract

Since pollen characters can be used to help distinguish species, our aim was to determine if palynological information has taxonomic significance for species from Xinjiang, China. is widely distributed in north temperate and the subtropical zones. The genus has limited taxonomic characteristics and large morphological variation, which results in difficulty of species classification. Pollen morphology of 16 species of this genus was examined comprehensively via light microscope (LM) and scanning electron microscope (SEM). One qualitative and nine quantitative traits of the pollen grains were surveyed, followed by hierarchical cluster analysis (HCA). The pollen grains were bilaterally symmetrical heteropolar monads with a mono-sulcus and they were oblate or peroblate (Polar diameter (P) / Equatorial diameter (E) = 0.36-0.73) in shape and medium to large (P = 17.17-34.64 μm, E = 27.63-81.65 μm) in size. Three types of exine ornamentation were observed: perforate, microreticulate and reticulate cristatum. The HCA divided the 16 species into two groups. This research provides new data on pollen morphology for (the pollen morphology of eight species was reported for the first time). Pollen morphology also can be used to identify species with similar external morphology, such as and . Furthermore, the study of pollen morphology not only provides new data for palynology research on , but also provides a basis for future classification of this genus.

摘要

由于花粉特征可用于帮助区分物种,我们的目的是确定孢粉学信息对于中国新疆的物种是否具有分类学意义。[该属植物]广泛分布于北温带和亚热带地区。该属具有有限的分类学特征且形态变异较大,这导致物种分类困难。通过光学显微镜(LM)和扫描电子显微镜(SEM)全面研究了该属16个物种的花粉形态。调查了花粉粒的一个定性特征和九个定量特征,随后进行了层次聚类分析(HCA)。花粉粒为两侧对称的异极单粒,具单沟,形状为扁球形或近扁球形(极轴(P)/赤道轴(E)= 0.36 - 0.73),大小为中等至大型(P = 17.17 - 34.64μm,E = 27.63 - 81.65μm)。观察到三种外壁纹饰类型:穿孔状、微网状和网状嵴状。层次聚类分析将16个物种分为两组。本研究提供了关于[该属植物]花粉形态的新数据(首次报道了8个物种的花粉形态)。花粉形态也可用于鉴别外部形态相似的物种,如[具体物种1]和[具体物种2]。此外,花粉形态研究不仅为[该属植物]的孢粉学研究提供了新数据,并为该属未来的分类提供了依据。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bd51/10194809/aad3fb2a3324/phytokeys-225-053_article-101518__-g001.jpg

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