A palynological study of genus Cousinia Cass. (Family Asteraceae), sections Cynaroideae Bunge and Platyacanthae Rech. f.

Atazadeh, Neda; Sheidai, Masoud; Attar, Farideh; Ghahremaninejad, Farrokh; Koohdar, Fahimeh

doi:10.1080/00173134.2020.1781247

Cited by 4 publications

(2 citation statements)

References 20 publications

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“…PCA analysis was applied based on exine sculpturing for taxonomic delimitation among the investigated species of the Cousinia sect. Cynaroideae and Platycanthae (Atazadeh et al, 2020). UPGMA was performed as a distinct cluster for the separation of out‐group species of Cirsium from the Carddus genus based on pollen characters (Azizi et al, 2013).…”

Section: Discussionmentioning

confidence: 99%

Palyno‐taxonomic approach through light and scanning electron microscopy for the identification of herbaceous Asteraceae species from Sikaram Mountain Pak‐Afghan border

Ali

Zafar

Ahmad

et al. 2023

Microscopy Res & Technique

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Due to the diverse and rich taxa, Asteraceae needs to explore from the untouched area. In this study, the pollen study was intended to assess the taxonomic value for Asteraceous taxa growing on the Sikaram Mountain Pak‐Afghan border. Both microscopic techniques (LM and SEM) play a significant role in the identification and classification of herbaceous species of Asteraceae for their taxonomic and systematic implication. Pollen was observed and measured for the 15 species of Asteraceae. For investigated taxa 15 pollen characters with size, shape, polar view, pollen type, aperture orientation, and exine sculpturing in the eurypalynous pollen. Consequently, the pollen grains are usually Tricolporate, triangular to circular in polar view, while, the shape of pollen varies from subulate, oblate, and prolate along with prolate to spheroidal whereas, sculpturing also varies from Scabrate to micro reticulate, echino‐perforate, Scabrate to echinate, echinate to granulate and echinate were observed. Similarly, among the quantitative data minimum values of polar and equatorial were 15.8 ± 0.74 μm in Filago pyramidata and 17.85 ± 0.39 μm in Heteropappus altaicus was measured respectively, while; the length of the spine with the least value of 2.45 ± 0.31 μm in Hertia intermedia and highest with 7.55 ± 0.31 μm was observed in Cirsium wallichii. The Exine thickness is a minimum of 1.70 ± 0.35 μm in Launaea nudicaulis and a maximum of 5.65 ± 3.59 μm in Cirssium vulgare. In addition, the highest pollen fertility (87%) in Centaurea iberica while the highest pollen sterility (32%) was recorded in Cirsium verutum. Furthermore, clustering via UPGMA, PCA, and PCoA analysis was performed for the separation of closely related taxa. It is concluded from this research work that palynological study has a crucial role in taxonomic, pure, and applied sciences. This study can be further authenticated and improved by a Phylogenetic study based on chloroplast DNA analysis & whole genome sequencing.Research Highlights Pollen ultrastructure among 15 Asteraceous taxa. Micromorphological attributes measured via LM and SEM. Exine sculpture elements patterns provide accurate identification. Taxonomic keys were developed for its systematics implications.

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Section: Discussionmentioning

confidence: 99%

Palyno‐taxonomic approach through light and scanning electron microscopy for the identification of herbaceous Asteraceae species from Sikaram Mountain Pak‐Afghan border

Ali

Zafar

Ahmad

et al. 2023

Microscopy Res & Technique

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“…Pollen studies in recent years on different plant families in Iran have been increasing significantly (e.g., ATAZADEH et al, 2020;MOHSENZADEH et al, 2020;RANJBAR et al, 2020); but the only study on pollen morphology of Iranian Hedera species related to the findings of AMINI et al (2019) by scanning electron microscopy that studied 11 accessions of two species of Hedera (H. helix and H. pastuchovii) have been considered to evaluate the relationships in Hedera. They observed the pollen grains of the studied species revealed some variations and separated two species of Hedera.…”

Section: Introductionmentioning

confidence: 99%

Palyno-morphology of Hedera L. (The ivy genus, araliaceae) and their systematics implications

Fallah

Ghahremaninejad

2021

Genetika

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The palynomorphological characteristics of 5 species belonging to Hedera of the Araliaceae family were studied in detail. These plant species were collected from various phytogeographical regions of Iran and Hungary. The palynological investigation was accomplished using Transmission Electron Microscope (TEM) and Scanning Electron Microscope (SEM). Pollen grains of the species are reticulate, prolate, sub-prolate, tricolporate, isopolar, radially symmetrical, and monad. The largest pollen grain was in the Hedera colchica species (72.24?1.6 ?m) and the smallest pollen grain was in Hedera helix (28.63?2.1 ?m). The research carried out by the TEM showed that the species were different in terms of exine thickness, tectum thickness, foot layer thickness, the diameter and length of the Columella, the thickness and shape of the Caput, the tectum to foot layer )T/F( ratio, the absence or presence of the Endexine and the thickness of the Intine layers. The main purpose of this study was the importance of the relationship between pollen grain size and the number of chromosomes and ploidy level in Hedera species.

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Endemik Cousinia aucheri DC. (İnce Kızan) Üzerine Anatomik, Palinolojik ve Mikromorfolojik Araştırmalar

Atasagun

Ulukuş

Tuğay

2021

Selçuk Üniversitesi Fen Fakültesi Fen Dergisi

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Cousinia, Asteraceae’deki en büyük cinslerden biridir, Güneybatı ve Orta Asya’da 700 tür içermektedir. Cousinia seksiyonu Türkiye’de 23 tür ile temsil edilmektedir. Cousinia’nın taksonomisi tartışmalıdır. Anatomi ve polen morfolojisinin kullanılması, türlerin tanımlanması ve sınırlandırılması için faydalı bir araç olabilmektedir. Bu nedenle bu çalışmada Cousinia aucheri DC’nin anatomik, palinolojik ve aken mikromorfolojik özelliklerini araştırmayı ve Cousinia’nın sistematiğine katkı sağlamayı amaçladık. Anatomik çalışmalar için gövde, yaprak ve orta damar kesitlerinde parafin yöntemi kullanıldı. Palizat parankima sayısı, orta damarın şekli, damar demetlerinin sayısı ve düzenlenişinin önemli taksonomik bilgiler sağladığı belirlendi. Polen preparatları Wodehouse yöntemine göre hazırlandı. Polen taneleri trikolporat aperture ve verrukat süslemeye sahip olduğu belirlenmiştir. Ayrıca akenlerin morfolojik ve mikromorfolojik özellikleri araştırılmış ve yüzey süslemelerinin retipilat olduğu tespit edilmiştir.

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A palynological study of genus Cousinia Cass. (Family Asteraceae), sections Cynaroideae Bunge and Platyacanthae Rech. f.

Cited by 4 publications

References 20 publications

Palyno‐taxonomic approach through light and scanning electron microscopy for the identification of herbaceous Asteraceae species from Sikaram Mountain Pak‐Afghan border

Palyno‐taxonomic approach through light and scanning electron microscopy for the identification of herbaceous Asteraceae species from Sikaram Mountain Pak‐Afghan border

Palyno-morphology of Hedera L. (The ivy genus, araliaceae) and their systematics implications

Endemik Cousinia aucheri DC. (İnce Kızan) Üzerine Anatomik, Palinolojik ve Mikromorfolojik Araştırmalar

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