scholarly journals Pollen morphology of Carapa species (Meliaceae) from the Brazilian Amazon

2016 ◽  
Vol 46 (3) ◽  
pp. 333-336
Author(s):  
Alexsandro ZIDKO ◽  
Luiz Antônio RODRIGUES ◽  
Cláudia Barbieri Ferreira MENDONÇA ◽  
Maria Lucia ABSY ◽  
Marcos Gonçalves FERREIRA ◽  
...  
Keyword(s):  
Pollen Morphology ◽  
Pollen Grains ◽  
Polar View ◽  
Brazilian Amazon ◽  
Microscopy Study ◽  
The Other ◽  
Carapa Guianensis ◽  
Equatorial Diameter ◽  
Taxonomic Implications ◽  
Scanning Electron

Abstract The crabwood (Carapa) represents an important source of natural resources. The objective of this work was to study the pollen morphology of the three species of Carapa (Meliaceae) registered in the Brazilian Amazon. The pollen grains were obtained from floral buds, pistillate and staminate flowers of Carapa guianensis, C. surinamensis and C. vasquezii. In order to explore the taxonomic implications of the pollen study for these species of Carapa, lactic acetolysis method was used for light microscopy study. Furthermore, the non-acetolyzed material was used in the study of the scanning electron microscopy. It was found that the three Carapa species present little variations in pollen morphology. Compared to the other species this study, Carapa vasquezii has higher values for the length and width of endoaperture; however, it has lower values for polar and equatorial diameter, equatorial diameter in polar view and apocolpium side.

scholarly journals Pollen studies in the genus viola (violaceae) from Iran

2014 ◽  
Vol 73 (1) ◽  
pp. 90-103 ◽  
Author(s):  
Shahryar Saeidi Mehrvarz ◽  
Narjes Yousefi ◽  
Maryam Mohammadi ◽  
Thomas Marcussen
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Pollen Morphology ◽  
Pollen Grains ◽  
Polar View ◽  
The Other ◽  
Oblate Spheroidal ◽  
Exine Ornamentation ◽  
Pollen Shape ◽  
Scanning Electron

AbstractPollen morphology of 17 species of Viola representing five sections, Melanium, Plagiostigma, 'Spathulidium' ined., Sclerosium, and Viola, was studied using light and scanning electron microscope. Pollen grains were usually symmetrical, tetrazonocolporate to pentazonocolporate in section Melanium and trizonocolporate to tetrazonocolporate in the other four sections. Pollen shape was circular to subtriangular, tetragonal or pentagonal in polar view and prolate to oblate, spheroidal or pyramidal in equatorial view. Exine ornamentation was granulate, psilate and mostly perforate. The psilate type was only observed in V. modesta.We found heteromorphy in aperture number in V. caspia of section Viola, V. occulta of section Melanium and V. behboudiana of section Sclerosium, which corroborates their higher ploidy than in related species (octoploid versus tetraploid).

scholarly journals Pollen morphology of Iranian Dracocephalum L. (Lamiaceae) and its taxonomic significance

2015 ◽  
Vol 22 (2) ◽  
pp. 99-110 ◽  
Author(s):  
Maryam Naderifar ◽  
Ali Sonboli ◽  
Abbas Gholipour
Keyword(s):  
Electron Microscopy ◽  
Pollen Morphology ◽  
Pollen Grains ◽  
Polar View ◽  
Taxonomic Significance ◽  
Infrageneric Classification ◽  
Exine Ornamentation ◽  
Plant Taxon ◽  
Scanning Electron

Pollen morphology of 11 Iranian Dracocephalum L. species was investigated using light and scanning electron microscopy to evaluate their taxonomic significance for the infrageneric classification of the genus. Pollen grains of all examined taxa were isopolar, hexacolpate, circular in polar view and spheroidal to prolate in equatorial view (P/E = 1.0?2.0). The smallest pollen grains were observed in D. aucheri (P = 29.7 ?m, E = 22.6 ?m), while the largest pollen was found in D. lindbergii (P = 45.1 ?m, E = 33.7 ?m). The highest and lowest apocolpium index (AI) were measured in D. aucheri (AI = 0.27) and D. surmandinum (AI = 0.08), respectively. Colpus membrane was egranulate in all examined species except for D. multicaule and D. ghahremanii. The main exine ornamentation type was characterized as bireticulate including five different subtypes. The results revealed that the exine ornamentation is a diagnostic character useful for the classification of Dracocephalum.Bangladesh J. Plant Taxon. 22(2): 99-110, 2015 (December)

Pollen morphology of Sabinaria magnifica (Cryosophileae, Coryphoideae, Arecaceae)

Phytotaxa ◽  
2015 ◽  
Vol 207 (1) ◽  
pp. 135 ◽  
Author(s):  
Giovanni Raul Bogota ◽  
Carina Hoorn ◽  
Wim Star ◽  
Rob Langelaan ◽  
Hannah Banks ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Light Microscopy ◽  
Pollen Morphology ◽  
Pollen Grains ◽  
The Other ◽  
Transmission Electron ◽  
Palm Species ◽  
Scanning Electron

Sabinaria magnifica is so far the only known species in the recently discovered tropical palm genus Sabinaria (Arecaceae). Here we present a complete description of the pollen morphology of this palm species based on light microscopy (LM), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). We also made SEM-based comparisons of Sabinaria with other genera within the tribe Cryosophileae. Pollen grains of Sabinaria magnifica resemble the other genera in the heteropolar, slightly asymmetric monads, and the monosulcate and tectate exine with perforate surface. Nevertheless, there are some clear differences with Thrinax, Chelyocarpus and Cryosophila in terms of aperture and exine. S. magnifica differs from its closest relative, Itaya amicorum, in the exine structure. This study shows that a combination of microscope techniques is essential for the identification of different genera within the Cryosophileae and may also be a necessary when working with other palynologically less distinct palm genera. 

scholarly journals Pollen morphology in selected species of Caricaceae with special reference to novel palynological characters

Botany ◽  
2018 ◽  
Vol 96 (1) ◽  
pp. 1-8
Author(s):  
Lucía Melisa Zini ◽  
Constanza Soledad Carrera ◽  
Elsa Clorinda Lattar ◽  
María Silvia Ferrucci
Keyword(s):  
Pollen Morphology ◽  
Pollen Grains ◽  
Grain Morphology ◽  
Polar View ◽  
Area Index ◽  
Equatorial Diameter ◽  
Polar Index ◽  
Electron Microscopes ◽  
Polar Diameter ◽  
Taxonomic Groups

The pollen grain morphology of Jacaratia corumbensis Kuntze, J. spinosa (Aubl.) A.DC., Vasconcellea quercifolia A. St.-Hil., and Carica papaya L. from Argentine samples were examined for the first time, using light and scanning electron microscopes. Observations and measurements were performed on acetolyzed pollen grains. Principal-components analysis was performed for quantitative morphological variables. Pollen grains were tri-colporate with lalongate endoaperture, oblate spheroidal to prolate, medium, exine bireticulate or reticulate, with a granulate lumina. A fastigium was present. Novel palynological data in this study for species identification revealed the presence of margo in C. papaya and variations in endoaperture shapes in all the species. The endoaperture ends often were H-shaped or horn-shaped. A biplot showed clear separation of the four taxa based on the palynological traits. Vasconcellea quercifolia was strongly correlated with equatorial diameter, equatorial diameter in polar view, exine thickness, and polar diameter, whereas J. corumbensis and J. spinosa were positively correlated with polar index and polar area index, respectively. The distance between two colpi allowed the discrimination of C. papaya. We confirmed the homogenous nature for most of the qualitative palynological characters in Caricaceae, and demonstrated that pollen morphology in combination with statistical analyses is a reliable tool for delimiting taxonomic groups.

scholarly journals Pollen morphology of Myrtaceae visited by social bees

2019 ◽  
Vol 6 (2) ◽  
pp. 98-105
Author(s):  
Andreia Santos do Nascimento ◽  
Carlos Alfredo Lopes de Carvalho
Keyword(s):  
Pollen Morphology ◽  
Pollen Grains ◽  
Polar View ◽  
Morphological Characters ◽  
Medium Size ◽  
Morphological Description ◽  
Pollen Spectrum ◽  
Social Bees ◽  
Equatorial Diameter ◽  
Polar Diameter

This study aimed to characterize species of Myrtaceae belonging to genera already identified in the pollen spectrum of beehive products of social bees, describing pollen grains morphology and correlating with taxonomic differences the species reported in the literature. For each plant species, measurements were made with 25 pollen grains in equatorial view and the polar diameter (PD) and equatorial diameter (ED) were measured. The exine thickness was obtained by measuring 10 pollen grains in polar view at the medium height of mesocolpium. The description of pollen morphology showed that pollen grains of the species are triangular amb, 3-colporates, psilate surface, small to medium size and oblate shape with the P/E ratio ranging from 0.52 to 0.72 µm. The morphological description of Myrtaceae species showed similarity between several characteristics common to pollen grains of this species. The description also allowed separation of nine species studied by size and specific morphological characters with the identification key, which can also be used to study the pollen spectrum of hive products.

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 and its systematic implication on some species of Artemisia L. from Gilgit-Baltistan Pakistan

2019 ◽  
Vol 26 (2) ◽  
pp. 157-168 ◽  
Author(s):  
Adil Hussain ◽  
Daniel Potter ◽  
Muhammad Qasim Hayat ◽  
Sumaira Sahreen ◽  
Syed Ali Imran Bokhari
Keyword(s):  
Pollen Morphology ◽  
Pollen Grains ◽  
Polar View ◽  
The Family ◽  
Artemisia Species ◽  
Taxonomic Marker ◽  
Micromorphological Characters ◽  
Gilgit Baltistan ◽  
Systematic Implication ◽  
Scanning Electron

This study was accomplished to scrutinize the pollen morphology of 15 species of the genus Artemisia of the family Asteraceae from Gilgit-Baltistan region of Pakistan by means of scanning electron microscopy (SEM). Results revealed pollen grains of Artemisia species with tricolporate shape, and characterized by globular symmetry (ellipsoid ball shaped from equatorial side and three lobed rounds from polar view) with few exceptions. Additionally, the pollens are marked with reduced spinules on their surfaces which are diagnostic character for the genus Artemisia. In this study, seven micromorphological characters of pollen grains of 15 Artemisia species viz. shape of pollen, arrangement of spinules, exine sculpture, spinules base, equatorial width and polar length, were employed to construct a dendrogram following the consequential cluster analyses. In the dentrogram, four groups within the studied Artemisia species have been recognized. The pollen morphology of Artemisia could be a good taxonomic marker to cope with its taxonomic delimitations in combination with other floral and molecular attributes.

scholarly journals Pollen morphology of Plantago species native to Poland and their taxonomic implications

2011 ◽  
Vol 73 (4) ◽  
pp. 315-325 ◽  
Author(s):  
Małgorzata Klimko ◽  
Krystyna Idzikowska ◽  
Mariola Truchan ◽  
Anna Kreft
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Light Microscope ◽  
Pollen Morphology ◽  
Pore Diameter ◽  
Pollen Grains ◽  
Pollen Grain ◽  
Prolate Spheroidal ◽  
Taxonomic Implications ◽  
Scanning Electron

Pollen grains of 9 species of the genus <em>Plantago</em> (Plantaginaceae), including 8 taxa native to Poland, were observed under a light microscope and a scanning electron microscope. Descriptions of grain sculpture are illustrated only SEM micrographs. The studied pollen grains were medium-sized or small, spherical or prolate spheroidal. Their sculpture was always verrucate with granulation. In the studied taxa, internal apertures had the form of pores. Their number ranged from (4)5-9(14). The pores were scattered on the surface of pollen grains. Identification features of individual taxa include: presence or absence of an annulus around each pore, annulus structure, ornamentation of the pollen grain and operculum, type of aperture membrane, number of internal pores, and pore diameter. We suggest that two new pollen grain types, characteristic of <em>P. intermedia</em> and <em>P. arenaria</em>, should be distinguished, and that <em>P. alpina</em> should be assigned to the <em>P. coronopus</em> type.

scholarly journals Pollen morphology of Amygdalus L. (Rosaceae) in Iran

2011 ◽  
Vol 79 (1) ◽  
pp. 63-71 ◽  
Author(s):  
Mahnaz Vafadar ◽  
Farideh Attar ◽  
Hosein Maroofi ◽  
Mansur Mirtadzadini
Keyword(s):  
Electron Microscopy ◽  
Pollen Morphology ◽  
Pollen Grains ◽  
Polar View ◽  
Pollen Grain ◽  
Type I ◽  
Type Ii ◽  
Type V ◽  
Scanning Electron ◽  
Section Level

Pollen grain of 16 species and three hybrids of the genus <em>Amygdalus</em> L., representing two subgenera and two sections distributed in Iran were examined by light and scanning electron microscopy. All pollen grains are tricolporate. The shape of grains varies from subprolate through prolate. Regarding outline, in polar view, pollen grains are triangular-circular and in equatorial view, elliptic. Regarding sculpturing of exine, the frequent type like many members of family <em>Rosaceae</em> is striate with or without perforations that can be subdivided into three subtypes: type I (A-B), type II (A-B) and type V. In three species, <em>A. trichamygdalus</em>, <em>A. spinosissima</em> and <em>A. orientalis</em>, exine sculpture type is completely different. In the first species is rugulate, in the second species is reticulate and in <em>A. orientalis</em>, it is gemmate-perforate. Ornamentation of ridges (muri) in the striate sculpture is parallel to ectocolpus. Number of perforations in tectum, diameter of them, striae intervals and the thickness of ridges varies among studied taxa. The striae have different depth and slope. Results showed that among pollen grain characters, shape is useful character solely for separating of taxonomic ranks in Iranian Amygdalus specially in subgeneric or section level.

Pollen morphology of North American species of Antennaria (Asteraceae: Inuleae)

1990 ◽  
Vol 68 (6) ◽  
pp. 1233-1238 ◽  
Author(s):  
J. G. Chmielewski ◽  
C. C. Chinnappa ◽  
B. G. Warner
Keyword(s):  
Electron Microscopy ◽  
Pollen Morphology ◽  
Pollen Grains ◽  
Population Level ◽  
The Other ◽  
Future Studies ◽  
Small Pollen ◽  
Preliminary Study ◽  
Exine Morphology ◽  
Scanning Electron

The pollen of 90 individuals representing 28 species and subspecies in the genus Antennaria is described through the use of light and scanning electron microscopy. Two morphological groupings separated on the basis of exine morphology are evident from cluster analysis. One group consists of those species and subspecies in which the exine is perforate and the other group consists of those individuals in which the exine is not perforate (perforate-reticulate or striate-perforate-reticulate). These two pollen morphological groups do not correspond with previously defined groupings based on morphology or cytogenetics. Both large (> 19 μm in diameter) and small pollen grains occur in each of the cluster groups. Similarly, both long- (> 2 μm) and short-spined individuals occur in each of the cluster groups. Used in combination, these characters do however exhibit some sectional affinities. Section Alpinae is characterized by pollen grains with long spines. Section Dioicae is characterized by small pollen grains. Section Plantaginifoliae is characterized by large pollen grains with long spines. Species included in sections other than these are not consistent in their pollen morphology. The pollen groups recognized in this preliminary study form a basis for future studies at the geographic or population level.

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