Pollen Morphology of the Genus Tragopogon (Asteraceae)

Azizi, Hejraneh; Sheidai, Masoud; Mozaffarian, Valiollah; Noormohammadi, Zahra

doi:10.1556/034.63.2021.1-2.2

Cited by 3 publications

(2 citation statements)

References 16 publications

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“…The genus Tragopogon generally has trizonocolporate pollen grains, but dizonocolporate and tetrazonocolporate pollen grains were also reported by Azizi et al (2022). According to ITS data, the species Tragopogon porphyrocephalus, T. stroterocarpus , and T. jesdianus belong to the Rubriflori section, which is aligned with the pollen statistics of Azizi et al (2021). Pollen grains are tricolporate and echinate with six abporal, three equatorial, and six interapertural lacunae within the genus Tragopogon .…”

Section: Discussionsupporting

confidence: 77%

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Scanning electron microscopic investigation on Chicory tribe (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: Discussionsupporting

confidence: 77%

“…of Azizi et al (2021). Pollen grains are tricolporate and echinate with six abporal, three equatorial, and six interapertural lacunae within the genus Tragopogon.…”

mentioning

confidence: 99%

Scanning electron microscopic investigation on Chicory tribe (Compositae) botanical sources and their antimicrobial potential

AlNadhari,

Al‐Qahtani,

Bughio

et al. 2024

Microscopy Res & Technique

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Molecular (ISSR, cp DNA, ITS) and morphological study of the genus Tragopogon L. (Asteraceae)

Azizi

Sheidai

Mozaffarian

et al. 2022

Genet Resour Crop Evol

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Tragopogon L. (Cichorioideae, Lactuceae, Scorzonerinae) is an Old World genus with 150 species, Rechinger in Flora Iranica divided this genus in 13 section and 37 species that 26 species of them are exist in Iran. Safavi et al. divided it into 26 species without sections in flora Iran. Despite the anatomical and molecular studies done around the world, the exact classification of this genus is not clear due to the high number of secret species, hybridization, polyploidy and rapid diversification. The morphology studies of 32 species and Molecular studies (ISSR, ITS, cp DNA) of 22 species of the genus Tragopogon was investigated. The purpose of these studies are classification and determination of interspecific relationship in this genus. Sections of Rubriflori, Sosnowskya, Chromopappus, Majores, Angustissimi, Krascheninnikovia in flora of Iranica are confirmed on the basis of morphometry and molecular data. Section of Profundisulcati in flora Iranica is confirmed on the base of morphometry data. The Species of T. jesdianus, T. porphyrocephalus, T. rezaiyensis and T. Stroterocarpus in the flora of Iranica are not classified in any section which we classified in the Rubriflori section, Cp DNA dendrogram are not useful for classification in this genus and Chloroplast sequences are very similar among Tragopogon species, Therefore, the use of cp DNA markers in the classification of this genus is not recommended.

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A Palynological Study of Some Helichrysum (Asteraceae) Species in Iran

Azizi,

Mozaffarian,

Talebi

et al. 2023

ABot

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In this study, palynological characteristics of 23 specimens of Helichrysum Mill., representing 12 Iranian species were investigated. We evaluated pollen grains (25 per specimens) and tested them by 15 qualitative and quantitative characteristics using Scanning Electron Microscopy (SEM). Pollen grain descriptions of most species were presented for the first time in the world. The pollen grains were tricolporate, radially symmetrical and isopolar in all examined samples. They were small, and rarely medium in size. The polar outline view (amb) was the same among the species. The overall views of pollen grains were prolate-spheroidal, oblate-spheroidal, subprolate, prolate and spheroidal. However, the more abundant type was prolate-spheroidal. The exine sculpture was echinate, and tectum is perforate. The ANOVA test revealed a significant variation (P < 0.001) for all the quantitative characteristics. In PCA analysis, the colpus length, width, and length/width ratio traits, polar and equatorial axes length, were the most variable features and some species were characterised by these characters. Results indicated that a few qualitative characteristics such as polar outline view and exine sculpture lack taxonomic importance via their stability among species. Also, the palynological traits had enough potential to separate the taxonomic boundaries of H. rubicundum and H. globiferum, but approximately the species clustering pattern did not agree with Flora Iranica.

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Pollen Morphology of the Genus Tragopogon (Asteraceae)

Cited by 3 publications

References 16 publications

Scanning electron microscopic investigation on Chicory tribe (Compositae) botanical sources and their antimicrobial potential

Scanning electron microscopic investigation on Chicory tribe (Compositae) botanical sources and their antimicrobial potential

Molecular (ISSR, cp DNA, ITS) and morphological study of the genus Tragopogon L. (Asteraceae)

A Palynological Study of Some Helichrysum (Asteraceae) Species in Iran

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