Palynological 
 Study of the Genus Sonchus from Pakistan

Qureshi, Sohail Jamil; Awan, Abdul Ghani; Khan, Mir Ajab; Bano, Samina

doi:10.3923/jbs.2002.98.105

Cited by 8 publications

(3 citation statements)

References 10 publications

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“…C. arvensis (1.20) and Centaurea calcitrapa (1.22) have the highest P/E ratios, which is similar to the results of Ali et al (2021) and (Khan, 2006). The pollen types of the genus Sonchus in our study are all trizonocolporate, echinolophate, and fenestrate, which is consistent with the results of Noor and Ahmad (2021) and Qureshi et al (2002). The highest polar and equatorial diameters are observed in S .…”

Section: Discussionsupporting

confidence: 92%

Pollen morphological investigation of selected species of family Asteraceae from Pakistan by using light and scanning electron microscopy

Hayat

Khan

et al. 2023

Microscopy Res & Technique

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A light and scanning electron microscopy technique was conducted to investigate the palynological features of 19 species belonging to 15 genera of the family Asteraceae. The species under investigation yielded pollen in a range of shapes, including spheroidal, prolate, and subprolate. Trizoncolporate, Tricolporate, and Tetracolporate are the three types of pollen apertures observed in examined species. Except for Gazania rigens, which has reticulate ornamentation under SEM, the exine pattern in all studied species is echinate. The majority of the species had isopolar polarity, whereas some members were apolar and heteropolar. The quantitative parameters that are polar to equatorial diameter, P/E ratio, length of colpi, width of colpi, length of the spine, width of spine, and exine thickness was measured by using light microscopy. The Coreopsis tinctoria had the lowest mean polar 19.75 μm to mean equatorial diameter 18.25 μm while the Silybum marianum had the highest polar 44.7 μm to equatorial 48.2 μm value. The value for colpi length/width was highest in Cirsium arvensis and lowest in C. tinctoria, measuring 9.7/13.2 μm and 2.7/4.7 μm, respectively. The spine length varied from 0.5 μm in Sonchus arvensis to 5.5 μm in Calendula officinalis. Verbesina encelioides had the highest exine thickness measurement (3.3 μm), whereas S. arvensis had the lowest (0.3 μm). The pollen surface of Tagetes erectus, has the highest number (65) whereas the lowest spines number (20) is found in S. arvensis. A taxonomic key based on pollen traits is provided for quick identification of the species. Significant implications for the systematics of the Asteraceae family can be drawn from the reported pollen's quantitative and qualitative data.

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Section: Discussionsupporting

confidence: 92%

Pollen morphological investigation of selected species of family Asteraceae from Pakistan by using light and scanning electron microscopy

Hayat

Khan

et al. 2023

Microscopy Res & Technique

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“…Pollen was monad, trizocolporate with exine sculpturing is echinate was examined for Conyza bonariensis (Khan et al, 2020). Exine sculpturing with echinate to spinate and triangular in polar view was recorded in the genus Sonchus (Qureshi et al, 2002). The average value of mesocolpium ranged from 23.25 to 30.00 μm was observed in Launaea procumbens (Ullah et al, 2021).…”

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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“…Palinologi merupakan kajian yang berkaitan dengan karakter polen (Qureshi et al 2002) atau spora (Misra and Tiwari 2016). Polen ditemukan pada tumbuhan tingkat tinggi sedangkan spora pada tumbuhan tingkat rendah, seperti tumbuhan paku.…”

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Inventarisasi Dan Kajian Palinologi Jenis-Jenis Tumbuhan Paku (Pterodofita) Epifit Di Kawasan Universitas Riau, Provinsi Riau

Sofiyanti

Harahap²

2019

JBT

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Abstrak : Tumbuhan paku (Pteridofita) epifit banyak di jumpai di kawasan Universitas Riau. Karakteristik spora pada tumbuhn apaku memegang peranan penting dalam kajian taksonomi. Penelitian ini bertujuan untuk mengidentifikasi jenis-jenis pteridofita epifit di kawasan ini dan mengkarakterisasi sporanya. Metode pengambilan sampel dilakukan menggunakan metode eksplorasi. Setiap jenis yang dijumpai didokumentasikan, dibuat herbarium, dideskripsi dan diidentifikasi. Spora dikoleksi dari daun yang sudah dewasa dan dibuat preparat menggunakan metode asetolisis. Preparat spora diamati dan didokumentasikan menggunakan mikroskop digital. Data yang diperoleh kemudian disajikan dalam bentuk gambar dan tabel serta dianalisis secara deskriptif. Hasil inventarisasi paku epifit di kawasan Universitas Riau mengidentifikasi 18 jenis paku epifit, yang tergolong ke dalam 6 famili yaitu Aspleniaceae, Davalliaceae, Nephrolepidaceae, Polypodiaceae Pteridaceae and Thelypteridaceae. Namun kajian palinologi hanya dilakukan pada 11 jenis yang sudah menghasilkan spora. Hasil pengamatan spora menunjukan bahwa semua jenis paku epifit mempunyai tipe dasar spora monolete, berbentuk ginjal dan hanya mempunyai satu laesura pada bagian ventral. Ukuran spora yang dijumpai adalah besar dan sangat besar, dengan ornamentasi permukaan Lohpat, verukat berpapila verukat, tuberkulat, ekinat pendek dan ekinat panjang. Morfologi spora yang ditemukan pada penelitian ini menunjukan karakteristik yang berbeda pada setiap jenis. Namun masih perlu dilanjutkan pengamatan menggunakan Scanning Electron Microscopy untuk mendapatkan oramentasi lebih detilKata kunci : paku epifit, palinologi, spora, monolete, UNRI Abstract : Ephypitic ferns are commonly found in University of Riau area. Spore characteristics play important role in taxonomical words. This study aimed to identify ephypitic pteridophyte species from this area and characterize their spore. Samples were collected using exploration method, and were then documented, prepared for herbarium, described and identified. Spore grains were collected from mature leaves and prepared by using acetolysis method. The spores were then observed and documented using digital microscope. Data were presented in figures and tables and describtively analized. The inventory of ephypitic ferns from University of Riau area identified a total of 18 fern species belong to 6 families, i.e. Aspleniaceae, Davalliaceae, Nephrolepidaceae, Polypodiaceae, Pteridaceae and Thelypteridaceae. Palinologycal study had been carried out from 11 species that produced spore. We observed the basic spore type of examined ephypitic ferns, monolete, with reniform shape and one laesura at the ventral part. The size of spore observed were big and very big spore, with surface ornamentation Lohpate, papillous verucate, verucate, tuberculate,, short echinate and long echinate. Spore morphology observed in this study showed the characteristic among the examined species. The further study using Scanning Electron Microscopy is neccesary to obtain detail spore ornamentation.Keywords: ephypitic fern, palynology, spore, monolete, UNRI

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Palynological Study of the Genus Sonchus from Pakistan

Cited by 8 publications

References 10 publications

Pollen morphological investigation of selected species of family Asteraceae from Pakistan by using light and scanning electron microscopy

Pollen morphological investigation of selected species of family Asteraceae from Pakistan by using light and scanning electron microscopy

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

Inventarisasi Dan Kajian Palinologi Jenis-Jenis Tumbuhan Paku (Pterodofita) Epifit Di Kawasan Universitas Riau, Provinsi Riau

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