The Use of Pollen Morphology to Disentangle the Origin, Early Evolution, and Diversification of the Asteraceae

Tellerı́a, Marı́a Cristina; Barreda, Viviana; Jardine, Phillip E.; Palazzesi, Luis

doi:10.1086/725046

Cited by 3 publications

(2 citation statements)

References 75 publications

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“…However, a limited number of studies have tried to reconstruct the diagnostic character states across the Asteraceae using morpho-pollen data. In this context, pollen traits relate to a recent phylogenomic tree of Asteraceae, incorporating both new and published observations (Tellería et al, 2023). Wang et al (2009) conducted the initial investigation of pollen grains in Cichorieae.…”

Section: Introductionmentioning

confidence: 99%

Scanning electron microscopic investigation onChicorytribe (Compositae) botanical sources and their antimicrobial potential

AlNadhari,

Al‐Qahtani,

Bughio

et al. 2024

Microscopy Res & Technique

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This study discusses the micro‐level structural details of Cichorieae pollen sources elucidated by scanning electron microscopy (SEM) and explains their symmetry and morphometry. The in‐depth knowledge from the electron ultrastructure of Asteraceae pollen has provided insights into enhanced pollen morphology, and the antimicrobial significance of species under study presents novel avenues for their natural defense mechanisms in the development of antimicrobial agents. In this research, both quantitative and qualitative features of pollen were examined. The pollen grains are prolate‐spheroidal and oblate‐spheroidal in shape, characterized by a maximum polar diameter of 55.6–61.0 μm and a maximum equatorial distance of 68.3–74.4 μm. SEM reveals various configurations such as echinate perforate‐tectate, psilate, and echino‐lophate perforate. The Cichorieae species have significant antimicrobial efficacy and are promising sources for the development of novel antimicrobial drugs with potential implications in pharmaceutical and healthcare industries. SEM analysis of Cichorieae pollens has provided remarkable insights into their unique structures, revealing diverse shapes and surface ornamentations, which can be used for accurate Asteraceae species identification.Research Highlights SEM provides unique pollen surface structures and patterns of Chicory pollen grains. Chemical composition of Chicory botanical sources provides valuable information on their potential as antimicrobial agents. SEM imaging reveals specialized fenestrate grain structures of taxonomic importance.

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Section: Introductionmentioning

confidence: 99%

Scanning electron microscopic investigation onChicorytribe (Compositae) botanical sources and their antimicrobial potential

AlNadhari,

Al‐Qahtani,

Bughio

et al. 2024

Microscopy Res & Technique

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“…Numerous palynological studies have been conducted on Asteraceae (Gonçalves-Esteves 1976, 1977a, 1977b; Gonçalves-Esteves and Esteves 1986, 1988a, 1989a, 1989b; Mendonça et al 2002; Cancelli et al 2005, 2010; Magenta et al 2010; Moreira et al 2019; Reshmi and Rajalakshmi 2019; Ulukuş and Tugay 2020; Marques et al 2021; Souza-Souza et al 2021, 2022; Tellería et al 2023). However, there are no specific papers describing the palynology of the tribe Neurolaeneae, only studies focused on Asteraceae that evaluated the pollen of some Neurolaeneae species: Calea species (e.g.…”

Section: Introductionmentioning

confidence: 99%

Palynotaxonomy of Calea sect. Meyeria (Asteraceae: Neurolaeneae)

Cartaxo-Pinto,

Vieira,

Nascimento

et al. 2023

Palynology

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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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Pollen morphology of Asteraceae from Garhwal Himalaya (Uttarakhand, India): part I

Negi,

Rawat,

Rawat

et al. 2024

Palynology

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The Use of Pollen Morphology to Disentangle the Origin, Early Evolution, and Diversification of the Asteraceae

Cited by 3 publications

References 75 publications

Scanning electron microscopic investigation onChicorytribe (Compositae) botanical sources and their antimicrobial potential

Scanning electron microscopic investigation onChicorytribe (Compositae) botanical sources and their antimicrobial potential

Palynotaxonomy of Calea sect. Meyeria (Asteraceae: Neurolaeneae)

Pollen morphology of Asteraceae from Garhwal Himalaya (Uttarakhand, India): part I

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