Contribution to Celastraceae Palynology from Cerrado Forest Fragments: A Focus on Shape, Amb and Exine Ornamentation

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY Accounts of Chemical Research Pub Date : 2022-12-28 DOI:10.1080/01916122.2022.2163315

Paloma Gaspar Torrati-Guioti, Talita Kely Bellonzi, E. Gasparino

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Abstract

ABSTRACT Forest fragments in the Cerrado are areas of prominent biological importance due to their great species richness and biodiversity. These areas host endemic species of Celastraceae, the knowledge of which contributes to the preservation of this biome. This study aims to characterize the pollen morphology of 10 native species of Celastraceae found in forest fragments in the state of São Paulo, Brazil, contributing to the knowledge of the taxa for future taxonomic studies, and providing data for the conservation of the species in the forest areas. The pollen grains were acetolyzed, measured, described qualitatively and illustrated using light microscopy and scanning electron microscopy. The pollen characters referring to the pollen unit, polarity, type and number of apertures are similar in all the species studied. The shape, amb and exine ornamentation of pollen grains are the diagnostic qualitative morphological data for Celastraceae in this study. Microreticulate pollen grains were observed in Celastrus, Hippocratea and Pristimera; reticulate pollen grains with a very thick exine characterize the analyzed species of Plenckia; and reticulate and microreticulate ornamentation was observed among the species of Monteverdia. The results obtained here allow us to distinguish species of the analyzed genera and confirm the pollen diversity previously reported for Celastraceae.

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塞拉多森林碎片对卫矛科Palynology的贡献——以形状、Amb和Exine装饰为重点

塞拉多的森林碎片因其丰富的物种和生物多样性而具有重要的生物学意义。这些地区拥有特有的Celastraceae物种，这方面的知识有助于保护这一生物群系。本研究旨在对巴西圣保罗州森林碎片中发现的10种Celastraceae原生物种的花粉形态进行研究，为今后的分类研究提供依据，并为该物种在森林地区的保护提供数据。对花粉粒进行乙酰化、测定、定性描述，并用光镜和扫描电镜进行图解。所有被研究物种的花粉单位、极性、类型和孔数等特征都是相似的。花粉粒的形状、形态和外壁纹饰是本研究的诊断性定性形态学资料。西芹属、希波克拉底属和Pristimera属的花粉粒呈微网状;花粉粒呈网状，外壁很厚;在Monteverdia种中观察到网状和微网状纹饰。所得结果使我们能够区分所分析属的种类，并证实了以前报道的Celastraceae的花粉多样性。

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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.