Can pollen exine ornamentation contribute to species delimitation in Korean Iris L. taxa (Iridaceae)?

IF 1.4 4区地球科学 Q3 PALEONTOLOGY

Palynology Pub Date : 2022-04-05 DOI:10.1080/01916122.2022.2061064

Bokyung Choi, Jangseung Rhu, Tae‐Soo Jang

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引用次数: 4

Abstract

Abstract Iridaceae L. is a large and well-known plant family that is widely distributed across the northern hemisphere. According to recent and ongoing taxonomic revision, its largest genus, Iris L., includes 14 species of perennial herbs occurring in Korea. Although pollen morphological data have proved crucial to the resolution of systematic relationships within the Iris genus, detailed palynological studies of Korean irises are scarce. Thus, this study aimed to describe the pollen morphology of 14 species representing two subgenera (Limniris and Pardanthopsis) of Korean Iris and one closely related species (Sisyrinchium rosulatum) using scanning electron microscopy. Pollen grains of all studied taxa were large in size (P = 35.9–86.7 μm, E = 37.3–72.9 μm), oblate (P/E = 0.68) to prolate (P/E = 1.99) in shape, and monosulcate with a granulate-perforate aperture membrane. Three types of exine ornamentation were identified in Korean Iris species: perforate (Type I); microreticulate (Type II); and reticulate (Type III), which was divided into four distinct subtypes based on lumen diameter. The observed pollen micromorphological characters enabled species distinction and taxonomic delimitation to the series level in the genus. The pollen morphological data presented in this study may be of systematic significance to Korean Iris species.

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花粉外壁纹饰是否有助于韩国鸢尾属（鸢尾科）的物种划分？

鸢尾科植物是广泛分布于北半球的一个大而知名的植物科。根据最近和正在进行的分类修订，其最大属鸢尾属包括14种产于韩国的多年生草本植物。虽然花粉形态数据已被证明是解决鸢尾属系统关系的关键，但详细的韩国鸢尾孢粉学研究很少。因此，本研究旨在利用扫描电镜对韩国鸢尾属(Limniris)和Pardanthopsis两个亚属以及一个近缘种(Sisyrinchium rosulatum)的14种花粉形态进行研究。各类群的花粉粒大小均较大(P = 35.9 ~ 86.7 μm, E = 37.3 ~ 72.9 μm)，形状呈扁圆形(P/E = 0.68) ~长形(P/E = 1.99)，单槽状，具粒状穿孔孔膜。鸢尾的外壁纹饰有3种类型:有穿孔(I型);微网状(II型);网状(III型)，根据管腔直径分为四个不同的亚型。观察到的花粉微形态特征使该属的种区分和分类划分达到系列水平。本研究提供的花粉形态资料可能对韩国鸢尾属植物具有系统意义。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Palynology 地学-古生物学

CiteScore

3.40

自引率

26.70%

发文量

审稿时长

>12 weeks

期刊介绍： Palynology is an international journal, and covers all aspects of the science. We accept papers on both pre-Quaternary and Quaternary palynology and palaeobotany. Contributions on novel uses of palynology, review articles, book reviews, taxonomic studies and papers on methodology are all actively encouraged.