scholarly journals Systematic importance of morphological features of pollen grains of species from Erica (Ericaceae) genus

PLoS ONE ◽  
2018 ◽  
Vol 13 (10) ◽  
pp. e0204557 ◽  
Author(s):  
Dorota Wrońska-Pilarek ◽  
Piotr Szkudlarz ◽  
Jan Bocianowski
Keyword(s):  
Pollen Grains ◽  
Morphological Features ◽  
Systematic Importance

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>

Pollen morphology of Stellaria (Caryophyllaceae) from China and its systematic implications

Phytotaxa ◽  
2020 ◽  
Vol 429 (2) ◽  
pp. 91-119 ◽  
Author(s):  
HAN-FENG XU ◽  
YU-HUI JIANG ◽  
ZHI-WEI SU ◽  
ZHONG-HUI MA
Keyword(s):  
Pollen Morphology ◽  
Pollen Grains ◽  
Morphological Features ◽  
Pollen Types ◽  
The Family ◽  
Pore Number

Pollen morphology of 46 species and 11 varieties representing the 5 currently recognized sections and 10 series of Stellaria from China was investigated. Pollen grains of Stellaria are radially symmetrical, apolar, small or medium in diameter, pantoporate, spheroidal or spheroidal-polyhedral and have 8–22 pores with prominent or sunken pore membrane. The ornamentation is microechinate-punctate, microechinate-perforate or microechinate-punctate-perforate. 8 pollen types are recognized, and significant differences in shape, size, pore number and ornamentation are found. Arenaria and Cerastium were proved to be related to Stellaria, whereas Myosoton was suggested to be merged into Stellaria. The pollen morphological features indicated Stellaria was in a middle evolutionary position of the family Caryophyllaceae.

scholarly journals Pollen morphology of Polish native species of the Rosa genus (Rosaceae) and its relation to systematics

2011 ◽  
Vol 80 (3) ◽  
pp. 221-232 ◽  
Author(s):  
Dorota Wrońska-Pilarek
Keyword(s):  
Native Species ◽  
Pollen Morphology ◽  
Pollen Grains ◽  
Pollen Grain ◽  
Morphological Features ◽  
Diagnostic Features ◽  
Qualitative Traits ◽  
Outline Shape ◽  
Analytical Results ◽  
Exine Sculpturing

The morphology of pollen grains of 16 species from the <em>Rosa </em>L. genus were studied (i.e. <em>R. agrestis</em>, <em>R. canina</em>, <em>R. dumalis</em>, <em>R. gallica</em>, <em>R. inodora</em>, <em>R. jundzillii</em>, <em>R. kostrakiewiczii</em>, <em>R. majalis</em>, <em>R. micrantha</em>, <em>R. mollis</em>, <em>R. pendulina</em>, <em>R. rubiginosa</em>, <em>R. sherardii</em>, <em>R. tomentosa</em>, <em>R. villosa</em>, and <em>R. zalana</em>). The material came from 16 native localities of those species in Poland. The measurements are based on at least 30-50 randomly selected, fully developed pollen grains per specimen. In total, 500 pollen grains were examined. They were analysed for 13 quantitative features of pollen grains and exine sculpturing and the following qualitative traits: outline, shape, "operculum" structure. The diagnostic features of pollen grains of studied species were: length of polar and equatorial axes and length of ectocolpi. The above-mentioned pollen grain morphological features make isolation of one species possible: <em>R. gallica</em>. <em>R. gallica </em>is distinguished for its highest values of the length of polar and equatorial axes, and the length of ectocolpi. The obtained analytical results of operculum and exine sculpture features, considered as diagnostic, corroborated only slightly their priority significance for the isolation of the examined species and sections. The collected data failed to confirm fully the current taxonomical division of the <em>Rosa </em>genus into sections (only section <em>Gallicanae</em> from <em>R. gallica </em>is isolated) as well as consanguinity relationships between the examined species from the <em>Caninae </em>section. On the dendrogram, both species closely related with each other as well as those from other developmental lines were found in the same group. These equivocal results are by no means surprising because the <em>Caninae </em>section is the most polymorphic group in the <em>Rosa </em>genus, and contemporary <em>Caninae </em>are of the nature of a swarm of <em>R. canina </em>hybrids as a link combining all taxons of the section.

scholarly journals Selection of morphological features of pollen grains for chosen tree taxa

Biology Open ◽  
2018 ◽  
Vol 7 (5) ◽  
pp. bio031237 ◽  
Author(s):  
Agnieszka Kubik-Komar ◽  
Elżbieta Kubera ◽  
Krystyna Piotrowska-Weryszko
Keyword(s):  
Pollen Grains ◽  
Morphological Features ◽  
Selection Of

scholarly journals 24A study on pollen morphology of the family Oleaceae Hoffmanns. & Link in Vietnam

2021 ◽  
Vol 63 (9) ◽  
pp. 19-24
Author(s):  
Hong Quang Bui ◽  
◽  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Light Microscopy ◽  
Pollen Morphology ◽  
Pollen Grains ◽  
Morphological Features ◽  
Prolate Spheroidal ◽  
The Family ◽  
Scanning Electron ◽  
Sem Analyses

This paper uses scanning electron microscopy (SEM) analyses and light microscopy (LM) to study pollen grains of species of the family Oleaceae Hoffmanns. & Link distributed in Vietnam, including 23 species belonging to 6 genera of the family (Oleaceae). Pollen grains of all species (Oleaceae) in Vietnam are isopolar, radial, 3- prolate pollen grains small size, with two types: subprolate type (Jasminum and Olea) and prolate spheroidal type (Jasminum, Fraxinus, Ligustrum, Osmanthus, and Chengiodendron). The surface of the pollen grains in most species is reticulate. These are important morphological features to classify the Nhai family through pollen morphology

scholarly journals Pollen morphology of the tribe Phyllodoceae (Ericoideae, Ericaceae) and its taxonomic significance

2014 ◽  
Vol 21 (2) ◽  
pp. 129-137 ◽  
Author(s):  
A.K.M. Golam Sarwar ◽  
Hideki Takahashi
Keyword(s):  
Pollen Morphology ◽  
Pollen Grains ◽  
Morphological Data ◽  
Taxonomic Significance ◽  
Viscin Threads ◽  
Sem Study ◽  
Plant Taxon ◽  
Generic Relationships ◽  
Systematic Importance ◽  
Scanning Electron

Pollen morphology of 13 taxa belonging to 5 genera of the tribe Phyllodoceae (Ericaceae) was examined by means of light and scanning electron microscopy (LM and SEM, respectively), or SEM alone. In Phyllodoceae, 3-colpor(oid)ate, minute to medium, oblate pollen grains are united usually in tetrahedral tetrads. Pollen tetrads are generally characterized by the presence of viscin threads except Elliottia pyroliflora, Epigaea asiatica and Phyllodoce caerulea. The absence of viscin threads might indicate to a secondary loss, since these are present at least in some species within all the genera of Phyllodoceae. The pollen morphological data confirm the infra- and inter-generic relationships as identified by molecular phylogeny of Phyllodoceae and/or vice-versa. Although various palynological characters were found to be taxonomically important at different taxonomic levels, the apocolpial exine sculpture is emerged as one of the most important palynological features of systematic importance. The rugulate apocolpial exine with striate secondary sculpture and a reduced colpus might be apomorphic palynological character states for this tribe and Ericaceae as well. Hitherto, it is the first SEM study of Rhodothamnus pollen.DOI: http://dx.doi.org/10.3329/bjpt.v21i2.21351Bangladesh J. Plant Taxon. 21(2): 129-137, 2014 (December)

scholarly journals Taxonomic position and identity of Stemodia scoparioides (Gratiolae, Plantaginaceae)

Phytotaxa ◽  
2013 ◽  
Vol 135 (1) ◽  
pp. 35 ◽  
Author(s):  
MARIA DE LAS MERCEDES SOSA ◽  
MASSIMILIANO DEMATTEIS
Keyword(s):  
Detailed Analysis ◽  
Geographic Distribution ◽  
Related Species ◽  
Pollen Grains ◽  
Morphological Features ◽  
Taxonomic Position ◽  
Type Material ◽  
Taxonomic Studies ◽  
Independent Species

In recent floristic and taxonomic studies, Stemodia scoparioides (Gratiolae, Plantaginaceae) has been considered a synonym of S. lanceolata or a synonym of S. stricta. However, a detailed analysis of the type material and additional specimens clearly indicates that this is a different species, which can be distinguished by the aspect of the plants, the size of the leaves, the shape of the blades, and the length of the corollas. Consequently, in this contribution Stemodia scoparioides is resurrected from the synonymy as an independent species based on the analysis of morphological features. Additionally, complete description (including the pollen grains), geographic distribution, ecological observations, and a key to distinguish the related species are also reported, together with an illustration of S. scoparioides.

scholarly journals Pollen morphology of Polish species from the genus Rubus L. (Rosaceae) and its systematic importance

2019 ◽  
Author(s):  
Kacper Lechowicz ◽  
Dorota Wrońska-Pilarek ◽  
Jan Bocianowski ◽  
Tomasz Maliński
Keyword(s):  
Pollen Morphology ◽  
Pollen Grains ◽  
Polar Axis ◽  
The Other ◽  
Individual Species ◽  
Bridge Structure ◽  
Interspecific Variability ◽  
Exine Ornamentation ◽  
First Time ◽  
Systematic Importance

AbstractThe genus Rubus L. (Rosaceae) has as yet not been investigated satisfactorily in terms of palynology. This genus is taxonomically very difficult due to the large number of species and problems with their delimitation, as well as very different distribution areas of particular species. The aim of this study was to investigate pollen morphology and for the first time the ranges of intrageneric and interspecific variability of Rubus species, as well as verify the taxonomic usefulness of these traits in distinguishing studied taxa from this genus. They were analysed for 11 quantitative pollen characteristics and the following qualitative ones: exine ornamentation, pollen outline and shape, as well as bridge structure. Analyses were conducted on a total of 1740 pollen grains, which represent 58 blackberry species belonging to a majority of subgenera and all the sections and series found in Poland. The diagnostic characters included exine ornamentation (exine ornamentation type, width and direction of grooves and striae, number and diameter of perforations) and length of the polar axis (P). The arrangement of the examined species on the dendrogram does not corroborate division of the genus Rubus into subgenera, sections and series currently adopted in taxonomy. The lack of dependence may result from apomixis observed in Rubus, which could reduce natural variability. Pollen features should be treated in taxonomy as auxiliary, because they fail to differentiate several (10) individual species, while the other ones create groups with similar pollen traits.

Pollen morphology of some Arenaria taxa (Caryophyllaceae)

Phytotaxa ◽  
2018 ◽  
Vol 351 (1) ◽  
pp. 29 ◽  
Author(s):  
CAHİT DOĞAN ◽  
SEDAT ÖMER ERDEM
Keyword(s):  
Light Microscope ◽  
Pollen Morphology ◽  
Pollen Grains ◽  
Morphological Characters ◽  
Morphological Features ◽  
Prolate Spheroidal ◽  
Pollen Type ◽  
Accurate Identification ◽  
Taxonomic Key ◽  
Pollen Shape

Palynological characteristics of 11 taxa belonging to the genus Arenaria (Caryophyllaceae) have been examined. Pollen grains in the pollen slides, which were prepared according to the method of acetolysis, morphological features were determined with light microscope and also with SEM, then microphotographs of pollens were taken. Morphological examinations were performed on the part of the work carried out with light microscope, pollen sizes, pore sizes and numbers were observed to vary between taxa. The pollen type of the studied taxa is pantoporate (periporate), pollen shape is prolate spheroidal, exine structure is subtectate, the ornamentation is microechinate-perforate. The pores are covered with operculum and the surface of the operculum is microechinate. According to the results of the study, pollen definitions of the taxa were made. Based on different palyno-morphological characters, a taxonomic key was develop for quick and accurate identification. The results of the study corroborate that morphological features, such as axes, aperture number, Plg, and Plt diameter and distance between pores, show differences which can be taken into consideration in the systematic discrimination within the groups, and also for discrimination of the taxa in the genus Arenaria.

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