Pollen criteria as a taxonomic tool to clarify the relationships between some taxa of Chenopodiaceae and Amaranthaceae

Baiomy, Aya Tarek; Mohamed, Alsafa Hassan; Hussein, Mariam Ibrahim; Tantawy, M.; Salim, Mohamed Abd elfattah

doi:10.5455/egyjebb.20200322081510

Cited by 2 publications

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“…However, our current examination shows that the pollen is punctate and densely micro‐echinate perforate, which is different from what they found. Bayoumy et al (2020) also visualized punctate grains in Celosia cristata while same observation was made in our findings for Celosia trigyna . Pollen grains in Anabasis species are peri‐polyporate, rounded and of two type based upon pore density of the inner porate region.…”

Section: Discussionsupporting

confidence: 92%

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Unveiling the intricacies of Amaranthaceous pollen diversity: Advancing ultra sculpture analysis through LM and SEM

Al‐Qahtani

2023

Microscopy Res & Technique

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Microscopic techniques can be applied to solve taxonomic problems in the field of plant systematic and are extremely versatile in nature. This study was focused on the new approaches to visualizing the imaging, tool to cover the micro‐structural techniques applied to the pollen study of Amaranthaceae floral biology. In this detailed study, we used light microscopy and scanning electron microscopy to examine the shape and changes in pollen of 16 types of Amaranthaceae plants from the salty arid zone of Riyadh Saudi Arabia. We observed subtle variations among the studied species through meticulous examination of morpho‐palynological features such as symmetry, size, shape, pore ornamentation, and exine characteristics. The pollen grains were round and had rough or prickly outer coverings. They had different numbers of tiny pores; some were slightly sunken. These findings were utilized to develop a pollen taxonomy key, facilitating accurate identification and classification of Amaranthaceous species. Our results shed light on the taxonomic significance of pollen morphology for species differentiation within the Amaranthaceae family. Furthermore, this study provides valuable insights into the influence of geographical and ecological factors on pollen diversity and evolution. This study of pollen imaging visualization of Amaranthaceous species contributes to the opportunity for taxonomic evaluation and fill knowledge gaps in studies of Amaranthaceous flora identification using classical microscopic taxonomic tools for their accurate identification.Research Highlights The pollen characters of selected Amaranthaceae species were visualized using scanning electron microscopy to observe sculptural wall pattern. The comprehensive Amaranthaceous pollen examination approach allowed us to accurately identify their micromorphology. This high‐resolution imaging technique provided detailed insights into the surface structures and ornamentation of the pollen grains.

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Section: Discussionsupporting

confidence: 92%

“…Bayoumy et al (2020) said that they found the same punctate type tectum in Aerva javanica as we did. The pollen of Aerva species has a rough surface and its outer layer is thicker (Perveen & Qaiser, 2002).…”

Section: Discussionsupporting

confidence: 84%

Unveiling the intricacies of Amaranthaceous pollen diversity: Advancing ultra sculpture analysis through LM and SEM

Al‐Qahtani

2023

Microscopy Res & Technique

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“…Nowicke and Skvarla [14] described the pollen grains of Aerva as with sunken pores and convex mesoporial exines [12]. Bayoumy et al [47] described punctate-type tectum in Aerva javanica as consistent with our findings. The spectrum of allergenic pollen in Karachi including Aerva 13 BioMed Research International javanica a major allergen revealed also scabrate ornamentation [48].…”

Section: Discussionsupporting

confidence: 90%

“…Pollen shape was subprolate and densely scabrate ornamentation as in Bassia eriophora while sparsely scabrate peculiarities were analyzed for Bassia arabica from Egypt [47]. Study of pollen grains by SEM indicated the presence of differences represented in density and distribution of spinules on the pollen surface, number of apertures, pollen exine punctate or smooth, and number of mesoporial spinules [58].…”

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confidence: 99%

Pollen Micromorphology among Amaranthaceous Species from Desert Rangeland: Exine Stratification and their Taxonomic Significance

Majeed

Ahmad

Ali

et al. 2023

BioMed Research International

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The aim of the study was to visualize the micromorphology of Amaranthaceous pollen using scanning electron microscopy collected from the Thal Desert. Field collection was conducted from July to September 2021. A total of 14 taxa of the family Amaranthaceae were collected which belong to nine genera. Achyranthes aspera, Aerva javanica, Aerva lanata, Amaranthus graecizans, Amaranthus retroflexus, Amaranthus viridis, Bassia indica, Chenopodium album, Chenopodium ficifolium, Chenopodium murale, Digera muricata, Haloxylon stocksii, Salsola tragus, and Suaeda fruticosa were studied in terms of pollen morphotypes. Pollen were acetolyzed and observed under optical and scanning microscopy. Qualitative and quantitative characters were measured to analyze the pollen to uncover its taxonomic significance. Qualitative characters observed were the shape of pollen in polar and equatorial views; the most frequent shape observed was spheroidal in the polar view, whereas in the equatorial view, prolate spheroidal was the dominant shape. Exine ornamentation is the key characteristic of pollen which is very helpful, and eight different types of ornamentations were observed in collected taxa: smooth sparsely granulate, scabrate-spinulose, microspinulose perforate, microechinate scabrate to metareticulate, granulate, nanospinulate, granulate-spinulose perforate, granulate-perforate echinate, and microechinate perforate. Periporate-type aperture was observed among all taxa. Mesoporia, ektexinous bodies, and tectum features also show variations among Amaranthaceous grains. In quantitative character, A. retroflexus recorded highest in polar view 26.3 μm and the lowest was of C. album 12.2 μm. Highest P/E index ratio was recorded in S. fruticosa (1.12) whereas the lowest for D. muricta (0.94). Exine thickness was highest in S. tragus 2.15 μm and lowest in A. graecizans 0.78 μm. The maximum number of pores was recorded as 32-36 in D. muricata. Artificial taxonomic keys were constructed based on findings that reinforce the importance of the micromorphological ultrastructural diversity of pollen among Amaranthaceous taxa. It was concluded that the descriptions of pollen morphotypes presented greatly contribute to our understanding of desert species identification.

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Pollen criteria as a taxonomic tool to clarify the relationships between some taxa of Chenopodiaceae and Amaranthaceae

Cited by 2 publications

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Unveiling the intricacies of Amaranthaceous pollen diversity: Advancing ultra sculpture analysis through LM and SEM

Unveiling the intricacies of Amaranthaceous pollen diversity: Advancing ultra sculpture analysis through LM and SEM

Pollen Micromorphology among Amaranthaceous Species from Desert Rangeland: Exine Stratification and their Taxonomic Significance

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