Systematic Importance of Pollen Morphology of Some Plants of (Lamiaceae)

2016 ◽  
Vol 7 ◽  
pp. 5 ◽  
Author(s):  
Azzazy, M.F
Keyword(s):  
Pollen Morphology ◽  
Morphological Characteristics ◽  
Pollen Grains ◽  
Thymus Vulgaris ◽  
Oblate Spheroidal ◽  
Salvia Splendens ◽  
Pollen Species ◽  
Mentha Longifolia ◽  
The Common ◽  
Systematic Importance

<p>Pollen morphology of seven taxa belonging to Lamiaceae and common used as medicinal plants were examined by light (LM) and scanning electron microscopy (SEM).<em> Thymus vulgaris</em> L.<em>, Mentha longifolia</em> (<a title="Carolus Linnaeus" href="https://en.wikipedia.org/wiki/Carolus_Linnaeus">L.</a>) <a title="William Hudson (botanist)" href="https://en.wikipedia.org/wiki/William_Hudson_(botanist)">Huds.</a> Mentha<em> spicata L.</em>, <em>Ocimum basillicium L.</em>, <em>Salvia elegans </em>Vahl<em>, Salvia farinace</em><em>a</em> Benth, and<em> Salvia splendens</em> Sellow ex Roem. and Schult. Pollen morphological characteristics are provided for these taxa. Among the studied taxa, <em>Mentha longifolia</em> has the smallest pollen grains, and <em>Ocimum basillicium</em> possesses the largest ones. The main shape of pollen grains in the most taxa  suboblate, oblate – spheroidal or prolate–spheroidal. However subprolate are recorded for <em>Salvia elegans</em>. The grains are hexacolpate in all taxa, but in <em>S.</em><strong><em> </em></strong><em>farinacea</em> octacolpate pollen was found. Three distinct exine sculpturing exist, reticulate–perforate the common type, also reticulate, granulate and bi-reticulate. However, the fine details are characteristic to differentiate between the pollen species. Exine is microreticulate in case of <em>S</em>. <em>elegans</em> and <em>S.</em><strong><em> </em></strong><em>farinacea</em>, but reticulate-foveolate in case of S<em>. splendens</em>. As well as, the presence of holes on colpus membrane ornamentation can be used as a taxonomic tool for sectional division between. <em>S. </em><em>elegans</em> from <em>S</em><em>. splendens</em> is clearly distinct from the other taxa examined by its characteristic pollen morphology. </p>

scholarly journals Relationship between pollen morphology and chromosome numbers in Brazilian species of Lippia L. (Verbenaceae)

2013 ◽  
Vol 85 (1) ◽  
pp. 147-157 ◽  
Author(s):  
Saulo M. Sousa ◽  
Patrícia M.O. Pierre ◽  
Giovana A. Torres ◽  
Lisete C. Davide ◽  
Lyderson F. Viccini
Keyword(s):  
Chromosome Numbers ◽  
Pollen Morphology ◽  
Pollen Grains ◽  
Positive Association ◽  
Single Species ◽  
Morphological Data ◽  
Prolate Spheroidal ◽  
Oblate Spheroidal ◽  
Exine Ornamentation ◽  
Different Types

The pollen morphology and exine structure of 17 species of Lippia L. were investigated in this work using light and scanning electron microscopy. Among the species studied, 14 showed tricolporate pollen grains, two had tri- and tetracolporate pollen grains and a single species exhibited, only tetracolporate pollen. The amb ranged from triangular to square, and the shape varied from oblate-spheroidal to prolate-spheroidal. Three different types of exine ornamentation were observed: psilate, scabrate and perforate. In addition to morphological data, we found positive association between the chromosome numbers and size of pollen grains, and also between the length and width of the colpi. The results indicate that the characteristics of pollen grains in Lippia may be used as an additional taxonomic character of the genus.

scholarly journals Pollen morphology of the genera Irlbachia, Tachia, Voyria and Voyriella (Gentianaceae Juss.) found in the Reserva Florestal Adolpho Ducke (Amazonas, Brazil)

2012 ◽  
Vol 26 (4) ◽  
pp. 916-923 ◽  
Author(s):  
Marcos Gonçalves Ferreira ◽  
Maria Lúcia Absy ◽  
Vânia Gonçalves-Esteves
Keyword(s):  
Pollen Morphology ◽  
Pollen Grains ◽  
Great Variability ◽  
Prolate Spheroidal ◽  
Morphology Study ◽  
Size And Shape ◽  
Oblate Spheroidal ◽  
Large Shape

A pollen morphology study of the Gentianaceae Juss. of Reserva Florestal Adolpho Ducke (Manaus, Brazil) was performed. The pollen grains of the studied species varied morphologically in their pollen units (tetrads or monads), size (small, medium and large), shape (oblate, suboblate, oblate spheroidal, spheroidal, prolate spheroidal and prolate), polarity (heteropolar, isopolar or subisopolar), symmetry (bilateral or radial) and number and type of aperture (3-colporate and 1-3porate). In relation to ornamentation, pollen grains had a sexine that was psilate in the Voyria species, microreticulate in Voyriella parviflora and reticulate heterobrochate in Tachia grandiflora and Irlbachia alata. The exine in I. alata showed great variability in the size and shape of the lumina, in addition to clavae of various sizes in the mesocolpium and apocolpium areas. In Tachia grandiflora, besides to long colpi, the heterobrochate exine demonstrated an increase in the lumina in the mesocolpium areas that decreased considerably in the apocolpium areas. In the species of Voyria, the pollen grains showed differences in shape, polarity and the number of apertures, which were spherical, isopolar and 3-porate in Voyria spruceana; prolate/oval, heteropolar and 1-porate in Voyria tenella; and oblate/elliptical (reniform), heteropolar and 2(3)-porate in Voyria aphylla and Voyria caerulea. The variations in pollen morphology and the peculiar characteristics of the genus suggest that Voyria should be treated as a unique taxon within Gentianaceae.

scholarly journals Pollen morphology of the genus Eremanthus Less. (Vernonieae, Asteraceae)

2012 ◽  
Vol 26 (1) ◽  
pp. 46-57 ◽  
Author(s):  
BenoÎt Loeuille ◽  
Raquel Maria Batista Souza-Souza ◽  
Vanessa Holanda Righetti Abreu ◽  
Cláudia Barbieri Ferreira Mendonça ◽  
Vania Gonçalves-Esteves
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Pollen Morphology ◽  
Additional Data ◽  
Phylogenetic Reconstruction ◽  
Pollen Grains ◽  
Prolate Spheroidal ◽  
Oblate Spheroidal ◽  
Quantitative Characters ◽  
Scanning Electron

In order to evaluate the significance of the pollen morphology for generic and infrageneric taxonomy of the genus Eremanthus (Vernonieae, Asteraceae), and to provide additional data for its phylogenetic reconstruction, the pollen of 20 of the 23 species of the genus was examined using light and scanning electron microscopy. Acetolysed pollen grains were measured, described, and illustrated using light microscopy, while non-acetolysed pollen grains were analyzed using scanning electron microscopy. Pollen grains of these species are isopolar, oblate-spheroidal in most of the species, more rarely prolate spheroidal or suboblate, subtriangular amb, tricolporate and subechinolophate. The variation among quantitative characters does not correlate with the macromorphological subdivision of the genus or with the generic or specific limits.

Contribution to the pollen morphology of Tragopogon (Asteraceae) in Turkey

Phytotaxa ◽  
2018 ◽  
Vol 361 (2) ◽  
pp. 168 ◽  
Author(s):  
MUTLU GÜLTEPE ◽  
SERDAR MAKBUL ◽  
SEDA OKUR ◽  
KAMİL COŞKUNÇELEBİ
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Pollen Morphology ◽  
Pollen Grains ◽  
Principal Component ◽  
Numerical Analyses ◽  
Oblate Spheroidal ◽  
Pore Length ◽  
Principal Component Analyses ◽  
Scanning Electron

The pollen morphology of 25 Tragopogon L. taxa (including four subspecies and four varieties) distributed in Turkey was studied under light and scanning electron microscopy. It was observed that pollen grains of the examined Tragopogon taxa are suboblate and oblate-spheroidal in shape, and 3-zonocolpororate with fifteen lacunae. The lenghts of the polar axes and equatorial axes range from 31.57 to 40.35 µm and 35.32 to 44.65 µm, respectively. Numerical analyses show that the length of equatorial axis and the pore length are the most valuable characters among nineteen palynological traits for separating the examined taxa. The general palynological characteristics of the examined taxa allow some taxonomical evaluations for the genus. However, the results of cluster and principal component analyses did not support the division of the genus at any subgeneric level; neither did the ligule colour, as reported in the literature.

scholarly journals Pollen morphology of Verbascum L. (Scrophulariaceae) in Northern and Central Iraq

2014 ◽  
Vol 21 (2) ◽  
pp. 159-165 ◽  
Author(s):  
Muazaz Al-Hadeethy ◽  
Athiya Al-Mashhadani ◽  
Talib Al-Khesraji ◽  
Sahapat Barusrux ◽  
Hazim Al-Jewari ◽  
...  
Keyword(s):  
Pollen Morphology ◽  
Pollen Grains ◽  
Pollen Size ◽  
Prolate Spheroidal ◽  
Oblate Spheroidal ◽  
Plant Taxon ◽  
Electron Microscopes

The present study highlights the taxonomic values of the pollen features of 20 species of Verbascum L. in Iraq. The pollen grains were acetolysed and observed under Light and Electron microscopes. Our results showed that the pollen grains of these species are usually radially symmetrical, isopolar, tricolporate and display reticulate sculpturing. The variations were found in shape, size, and exine thickness. Most of the species are subprolate, prolate spheroidal, and prolate, whereas oblate spheroidal pollens were found only in V. thapsus. The pollen size among the species studied ranges from 16.2-32.5 µm. The majority of species are medium sized except V. agrimoniifolium and V. oreophilum that are small sized, and four species i.e. V. palmyrense, V. sinuatum, V. songaricum, and V. thapsus having both small and medium sized pollen grains. Moreover, the result showed that the exine thickness ranges from 0.87-4.75 µm, but this value can overlap between some species. Therefore, only the shape of pollen grains could be used to classify these species into groups.DOI: http://dx.doi.org/10.3329/bjpt.v21i2.21355Bangladesh J. Plant Taxon. 21(2): 159-165, 2014 (December)

scholarly journals Taxonomic significance of pollen morphology in Succisa and Succisella

2019 ◽  
Vol 55 (1) ◽  
pp. 1-6 ◽  
Author(s):  
Zoya M. Tsymbalyuk ◽  
Sergei L. Mosyakin ◽  
Lyudmila M. Nitsenko
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Pollen Morphology ◽  
Pollen Grains ◽  
Polar View ◽  
Taxonomic Significance ◽  
Oblate Spheroidal ◽  
Phylogenetic Studies ◽  
Molecular Phylogenetic ◽  
Scanning Electron

Abstract Pollen morphology of representatives of the genera Succisa and Succisella in the flora of Ukraine was studied using light and scanning electron microscopy. Pollen grains in both taxa were tricolpate, prolate, rarely oblate-spheroidal or spheroidal; large-sized. Their outline in polar view was subcircular, rarely trilobate, in equatorial view elliptical or rarely circular. Colpi short, of variable width, margins irregular with distinct, narrow margo, and blunt or acute ends. Exine sculpture was echinate-microechinate. The revealed characteristics of pollen grains are taxonomically significant at the generic and specific levels, and they can be used in pollen analysis. Palynomorphological data are consistent with the results of recent molecular phylogenetic studies. Data on pollen morphology also confirm taxonomic circumscription of Succiseae V. Mayer & Ehrend. Pollen grains in Succiseae are characterized by a tricolpate aperture type, which was probably ancestral in Dipsacaceae s. str.

scholarly journals Pollen morphology of Malvaceae genera from Saudi Arabia and its taxonomic significance

2021 ◽  
pp. 725-742
Author(s):  
Kadry Abdel khalik ◽  
Suad Al- Ruzayza ◽  
Abdullah Assiri ◽  
Ahmed Elkordy
Keyword(s):  
Saudi Arabia ◽  
Pollen Morphology ◽  
Pollen Grains ◽  
Polar Axis ◽  
Morphological Characters ◽  
Average Height ◽  
Prolate Spheroidal ◽  
Oblate Spheroidal ◽  
Equatorial Diameter ◽  
Pollen Shape

Pollen morphology of 20 species belong to seven genera (Abutilon, Althaea, Hibiscus, Malva, Pavonia, Senra and Sida) of Malvaceae from Saudi Arabia were studied by using light microscope (LM) and scanning electron microscope (SEM). Quantitative and qualitative pollen morphological characters which vary among investigated taxa are found in the pollen polarity, symmetry, size, shape, polar axis, equatorial diameter, P/E ratio, average height and width of spine, aperature character and spine index. The pollen grains vary from spheroidal, prolate spheroidal, oblate spheroidal to suboblate. All taxa were characterized by relatively large to medium sized pollen grains, numerous pores scattered irregularly all over the grain, and echinate sculpturing. Sida ovata is the largest size pollen grain (138.95) µm. On the other hand, Malva parviflora showed the smallest pollen size (52.28 µm). The average height and width of spine varied greatly among studied taxa. The highest spines (20.65µm) found in Sida ovata, while the shortest (3.19 µm) was found in Abutilon pannosum. Results of the pollen shape, size, and exine sculpture characters offered useful data for evaluating the taxonomy of Malvaceae both on subgeneric and sectional levels. A key for the identification of the investigated taxa based on pollen grains characters is also provided

Pollen morphology of subfamily Maloideae (Roseaceae) with special focus on the genus Photinia

Phytotaxa ◽  
2019 ◽  
Vol 404 (5) ◽  
pp. 171
Author(s):  
MITRA LAL PATHAK ◽  
MUHAMMAD IDREES ◽  
BO XU ◽  
XIN FEN GAO
Keyword(s):  
Pollen Morphology ◽  
Pollen Grains ◽  
Sensu Stricto ◽  
Pollen Size ◽  
Special Focus ◽  
Type I ◽  
Generic Level ◽  
Oblate Spheroidal ◽  
Exine Ornamentation ◽  
Pollen Shape

Pollen morphology of 27 species of Photinia sensu stricto and five closely related genera of subfamily Maloideae (Rosaceae) were studied in detail. Palynomorphological characteristics were examined using scanning electron microscopy (SEM). Comparative pollen analysis was accomplished based on pollen size, shape, polar and equatorial views, polar and equatorial diameter ratio (P/E ratio), width of aperture, and exine ornamentation. The pollen grains of studied species were found to be monad, tricolporate, small to medium in size (P=17.42–30.45 μm, E=9.26–20.18 μm) and to have shapes oblate-spheroidal (0.88–1.0 μm), prolate-spheroidal (1.01–1.14 μm), sub-prolate (1.15–1.33 μm), prolate (1.34–2 μm), and perprolate (>2 μm). The exine ornamentation was perforated-striate, and two different types were identified. The result of quantitative characters has paltry taxonomic importance. The characters studied here delimit at generic level for some genera but not at species level. The obtained result was partially consistent with that of molecular studies published earlier. The pollen size and shape were found to be different between Asian and American species of Photinia. Especially exine sculpture was found to be an important feature to distinguish species of all genera studied. PCA analysis showed that the pollen shape, pollen sculpture, pollen size, and polarity are the key characters to distinguish the species of Photinia and the closely related genera in subfamily Maloideae. Based on pollen exine, two groups (Type I and Type II) were distinguished. The aim of the present study was to find out the taxonomic significance of palynomorphological characteristics in subfamily Maloideae (Rosaceae).

Pollen morphology of selected species of Anacardiaceae and its taxonomic significance

Rodriguésia ◽  
2021 ◽  
Vol 72 ◽  
Author(s):  
Alano César Rocha de Assis ◽  
Eduardo Custódio Gasparino ◽  
Marileide Dias Saba
Keyword(s):  
Phylogenetic Relationships ◽  
Quantitative Data ◽  
Pollen Morphology ◽  
Pollen Grains ◽  
Taxonomic Significance ◽  
Electron Microscopies ◽  
Oblate Spheroidal ◽  
Exine Ornamentation ◽  
The Family ◽  
Scanning Electron

Abstract In the present work, the pollen morphology of 22 species of Anacardiaceae was analysed, occurring in the state of Bahia, Brazil. The palynological material was obtained from specimens deposited in herbaria. The pollen grains were acetolysed, measured, illustrated and described under light and scanning electron microscopies. The quantitative data were statistically analysed according to sample size. The analysed species presented pollen grains in monads, small to medium sized, isopolar, amb circular to subtriangular, with shapes varying from oblate-spheroidal to prolate, 3-colporate, with fastigium in some species. The exine ornamentation was characterized as psilate, striate, microreticulate-striate, striato-perforate, suprastriato-infra(micro)reticulate. The pollen morphology variation confirms the eurypalynous character of the family. The attributes of the apertures and exine may collaborate in the taxonomic circumscription and provide a clarification of the phylogenetic relationships of the group.

Pollen morphology of Scorzonera (Asteraceae) in Turkey

Phytotaxa ◽  
2016 ◽  
Vol 252 (4) ◽  
pp. 233 ◽  
Author(s):  
NUR MÜNEVVER PINAR ◽  
KAMİL COŞKUNÇELEBİ ◽  
DERYA ŞİMŞEK ◽  
SEDA OKUR ◽  
SERDAR MAKBUL ◽  
...  
Keyword(s):  
Numerical Analysis ◽  
Pollen Morphology ◽  
Pollen Grains ◽  
Polar View ◽  
Apical Portion ◽  
Equatorial View ◽  
Electron Microscopies ◽  
Oblate Spheroidal

The pollen morphology of 45 taxa belonging to 15 sections of the genus Scorzonera distributed in Turkey were studied with light and electron microscopies. The pollen is generally 3-zonocolporate. Pollen grains are oblate-spheroidal with the polar axes 23.2–59.2 µm and the equatorial axes 27–62.5 µm. The outline is more or less circular to slightly elliptic in equatorial view and triangular or obtuse-hexagonal in polar view; amb semiangular to intersemiangular. Sculpturing is echinolophate. The spines are commonly concave-conical with a broad basis, sides are straight or slightly convex with a subacute tapered apical portion. Numerical analysis showed that polar axes, equatorial axes and exine thickness are valuable variables for seperating the examined taxa.

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