Palynotaxonomy of Calea sect. Meyeria (Asteraceae: Neurolaeneae)

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2023-07-31 DOI:10.1080/01916122.2023.2242449

Simone Cartaxo-Pinto, Ilgner Fernando Tavares Vieira, Jeane Marinho Nascimento, Vinicius R. Bueno, G. Heiden, C. Mendonça, Vania Gonçalves-Esteves

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Abstract

Abstract Calea comprises 157 species that occur in the Neotropics. The genus is organized into eight subgenera and 18 sections. Calea sect. Meyeria consists of eight species occurring exclusively in south-central Brazil. In this study, pollen grains from these eight species were sampled from herborized flower buds in pre-anthesis. Pollen samples were acetolyzed, measured, and photographed under a light microscope. Unacetolyzed pollen grains were examined under a scanning electron microscope. The results were used to characterize pollen morphology and construct a palynotaxonomic key for Calea sect. Meyeria. The analyzed pollen grains were monads, isopolar, usually medium-sized, oblate spheroidal, tricolporate, with lalongate endoaperture, the sexine echinate and thicker than the nexine, and six spines in the apocolpium region. The eight species have very similar pollen grains, but some characters are informative for this section, namely pollen size, polar area, sexine ornamentation, and endoaperture characteristics. Despite the similarity of the pollen grains, palynological analysis was able to contribute to the delimitation of Calea species, providing new information for species distinction within Calea sect. Meyeria.

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Calea派的Palynotalogy。Meyeria（菊科：Neurolaeneae）

摘要Calea包括157种出现在新热带地区的物种。该属分为8个亚属和18个科。卡利亚教派。Meyeria由八个物种组成，专门分布在巴西中南部。在这项研究中，这八个物种的花粉粒是从开花前的除草花蕾中取样的。花粉样品进行乙酰乙酸水解，测量，并在光学显微镜下拍照。在扫描电子显微镜下检查未溶解的花粉粒。这些结果被用来表征Calea派的花粉形态，并构建一个花粉分类学钥匙。Meyeria。所分析的花粉粒为单子叶，等极性，通常中等大小，扁球形，三孔，内孔为lalongate，最性感的是针叶树，比最性感的更厚，在无脐区有六枚刺。这八个物种的花粉粒非常相似，但一些特征对本节来说是有用的，即花粉大小、极地面积、最性感的装饰和内孔特征。尽管花粉粒相似，但孢粉学分析有助于Calea物种的划界，为Calea门内的物种区分提供了新的信息。Meyeria。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.