scholarly journals Palynological features of eleven Aethionema taxa from Turkey and their systematic implications

2017 ◽  
Vol 24 (2) ◽  
pp. 197-204 ◽  
Author(s):  
Mehmet Cengiz Karaismailoglu
Keyword(s):  
Pollen Morphology ◽  
Pollen Grains ◽  
Plant Taxon ◽  
Surface Ornamentation ◽  
Electron Microscopes ◽  
Scanning Electron Microscopes ◽  
Scanning Electron

Pollen morphology of 11 taxa, including 2 endemic of the genus Aethionema W.T. Aiton from Turkey was examined under light and scanning electron microscopes. The pollens of Aethionema are mostly isopolar and bilaterally symmetric; spheroidal, prolate, perprolate and subprolate with the polar axes 14.07-26.41 μm and the equatorial axes 7.85-22.02 μm; mostly tricolpate, rarely 2-colpate; surface ornamentation is micro or macro reticulate. The exine thickness varies between 0.66 and 1.91 μm, and in tine thickness ranges from 0.27 to 0.85 μm. It is found that dimension of pollen grains, surface ornamentation, apocolpidium and amb diameter are taxonomically significant.Bangladesh J. Plant Taxon. 24(2): 197-204.

scholarly journals Pollen morphology of some Turkish Campanula spp. and their taxonomic value

1970 ◽  
Vol 37 (1) ◽  
pp. 33-42 ◽  
Author(s):  
Ismuhan Potoglu Erkara ◽  
Atila Ocak ◽  
Sevil Pehlivan
Keyword(s):  
Key Words ◽  
Pollen Morphology ◽  
Pollen Grains ◽  
Exine Sculpture ◽  
Electron Microscopes ◽  
Scanning Electron Microscopes ◽  
First Time ◽  
Scanning Electron

Detailed pollen morphological structures of 12 Turkish species of Campanula L., e.g. C. argaea, C. cymbalaria, C. glomerata subsp. hispida, C. latiloba subsp. latiloba, C. lyrata subsp. lyrata, C. olympica, C. persicifolia, C. pterocaula, C. rapunculoides subsp. cordifolia, C. rapunculus var. rapunculus, C. stricta var. stricta, C. pamphylica subsp. tokurii have been studied under light (LM) and scanning electron microscopes (SEM) for the first time. LM and SEM investigations show that the pollen grains of 12 taxa are more or less oblato-sphaeroidal, triporate (and/or tetraporate), tectum-scabrate, or with circular amb. The exine sculpture is granulate-scabrate in C. argaea, C. lyrata subsp. lyrata, C. stricta var. stricta, C. glomerata subsp. hispida and C. pamphylica subsp. tokurii; but those of C. cymbalaria, C. latiloba subsp. latiloba, C. olympica, C. persicifolia, C. pterocaula, C. rapunculoides subsp. cordifolia and C. rapunculus var. rapunculus are rugulate-scabrate.   Key words: Campanula, Pollen grains, Pollen morphology doi:10.3329/bjb.v37i1.1561 Bangladesh J. Bot. 37(1): 33-42, 2008 (June)

scholarly journals Pollen morphology of some Turkish Ajuga L. (Lamiaceae) and its taxonomic value

1970 ◽  
Vol 40 (1) ◽  
pp. 29-33 ◽  
Author(s):  
Yavuz Bulent Kose ◽  
Ismahan Potoglu Erkara ◽  
Sevim Alan
Keyword(s):  
Key Words ◽  
Pollen Morphology ◽  
Pollen Grains ◽  
Exine Sculpture ◽  
Electron Microscopes ◽  
Scanning Electron Microscopes ◽  
First Time ◽  
Scanning Electron

Pollen morphological structures of eight Turkish species of Ajuga, namely A. bombycina Boiss., A. chamaepitys (L.) Schreber ssp. chia var. chia (Schreber) Arcangeli, A. chamaepitys (L.) Schreber ssp. chia var. ciliata Briq., A. chamaepitys (L.) Schreber ssp. cuneatifolia (Stapf) P. H. Davis, A. genevensis L., A. laxmannii (L.) Benthum, A.orientalis L. and A. reptans L. have been studied under light and scanning electron microscopes for the first time. It is revealed that the pollen grains of Ajuga taxa are more or less suboblata-subprolata and tricolpatae. The exine sculpture is granulate in A. chamaepitys subsp. chia var. chia, A. chamaepitys subsp. cuneatifolia, A. genevensis, A. laxmannii, A. orientalis and A. reptans, but it is reticulate in A. bombycina and A. chamaepitys subsp. chia var. ciliata. Key words: Turkish Ajuga; Pollen morphology; Taxonomic value DOI: http://dx.doi.org/10.3329/bjb.v40i1.7994 Bangladesh J. Bot. 40(1): 29-33, 2011 (June)

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)

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 Pollen Morphological Investigations of Salvia L. In Southeastern of Turkey and Its Taxonomic Implication

2021 ◽  
Vol 28 (2) ◽  
pp. 395-403
Author(s):  
Fatma Mungan Kiliç
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Light Microscopy ◽  
Pollen Morphology ◽  
Pollen Grains ◽  
Surface Sculpture ◽  
Plant Taxon ◽  
Pollen Shape ◽  
Micromorphological Characters ◽  
Scanning Electron

In this study, the pollen morphology and exine structure of nine species of the genus Salvia L. (Lamiaceae) were investigated using light microscopy and scanning electron microscopy (SEM). Six micromorphological characters (pollen shape, polar length, equatorial width, exine and intine thickness, colpus length and colpus width) of pollen grains of Salvia have been identified. The palynological observations revealed that pollen grains of most studied taxa of Salvia were suboblate shape and possess hekzacolpate aperture. Tectal surface sculpture was a good criterion to identify particular taxa from Salvia. The pollen of which is characterized by reticulate, the pollen ornamentation was similar in all studied taxa. Bangladesh J. Plant Taxon. 28(2): 395-403, 2021 (December)

Pollen morphology of some Verbascum (Scrophulariaceae) taxa in Turkey

Phytotaxa ◽  
2018 ◽  
Vol 333 (2) ◽  
pp. 209 ◽  
Author(s):  
AYŞE ÖZTÜRK ◽  
KUDRET BETÜL GÜNEY ◽  
BARIŞ BANİ ◽  
KERİM GÜNEY ◽  
FAİK AHMET KARAVELİOĞULLARI ◽  
...  
Keyword(s):  
Pollen Morphology ◽  
Pollen Grains ◽  
Polar Axis ◽  
Prolate Spheroidal ◽  
Oblate Spheroidal ◽  
General Terms ◽  
Surface Ornamentation ◽  
Pollen Shape ◽  
Axis Length ◽  
Scanning Electron

Pollen morphology of six Verbascum (Scrophulariaceae) taxa belonging to five different groups in the genus [V. georgicum (group E), V. nudatum var. nudatum (group F), V. cariense (group F), V. bithynicum (group H), V. pycnostachyum (group K), and V. lasianthum (group L)] was studied. Pollen slides were prepared according to the Woodhouse method and were examined with light-microscopy (LM) and Scanning Electron Microscopy (SEM). All studied pollen grains are generally monads, though tetrads (5 %) were observed in Verbascum nudatum var. nudatum. Pollen grains of all studied taxa were determined as isopolar and radially symmetric. In general terms, aperture types are trizonocolporate, but also trisyncolpate (V. lasianthum 10 %, V. pycnostachum 1 %, and V. georgicum 4 %) and trizonocolpate (V. cariense 10 %, V. bithynicum 10%, V. lasianthum 90%, V. pycnostachyum 9%, and V. georgicum 96 %) aperture types were observed. The shapes of the pollen grains were determined as prolate, subprolate, prolate-spheroidal and oblate-spheroidal. The sculpture was reticulate in all cases. The results of the study corroborate that morphological features, such as pollen shape, polar axis length (P), equatorial axis length (L), aperture type, surface ornamentation, muri thickness, and lumina shape, show differences which can be taken into consideration in the systematic discrimination within the groups, and also for discrimination of the groups in the genus.

scholarly journals Morphological and anatomical investigations in Desmodium tortuosum (Sw.) DC. (Fabaceae): A new addition to the Egyptian flora

1970 ◽  
Vol 15 (1) ◽  
pp. 21-29 ◽  
Author(s):  
Abdel Samai Moustafa Shaheen
Keyword(s):  
New Record ◽  
Nile Valley ◽  
Stem Anatomy ◽  
Leaf Petiole ◽  
Morphological Studies ◽  
Plant Taxon ◽  
Electron Microscopes ◽  
Scanning Electron Microscopes ◽  
Scanning Electron

The morphological, anatomical and micromorphological features of Desmodium tortuosum (Sw.) DC. were investigated to assist in the identification of the species as a new record for Egypt. Specimens collected from different places in the Egyptian Nubia (Nubian Nile Valley) confirmed the presence of D. tortuosum as a naturalized species in the country. In general, the results obtained from the morphological studies were consistent with the previous studies on this species. However, the present investigation into leaf, petiole and stem anatomy and the seed and the leaf patterns under light and scanning electron microscopes, respectively, is the first such study on the species.Keywords: Adaxial bundle, Abaxial bundle, Seed pattern, Micromorphology, Desmodium tortuosumDOI: 10.3329/bjpt.v15i1.908Bangladesh J. Plant Taxon. 15(1): 21-29, 2008 (June) 

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 Pollen morphology of four endemic species of Pedicularis L. from alpine zone of the Deosai Plateau, Himalayan range

2012 ◽  
Vol 19 (1) ◽  
pp. 1-5 ◽  
Author(s):  
Abida Bano ◽  
Mushtaq Ahmad ◽  
Mir Ajab Khan ◽  
Muhammad Zafar ◽  
Shazia Sultana ◽  
...  
Keyword(s):  
Electron Microscope ◽  
Pollen Morphology ◽  
Pollen Grains ◽  
Alpine Zone ◽  
Exine Sculpturing ◽  
Plant Taxon ◽  
Pollen Shape ◽  
First Time ◽  
Fertility Estimation ◽  
Scanning Electron

The pollen morphology with special reference to exine sculpturing of four species of the genus Pedicularis L. has been examined by light and scanning electron microscope. Comparative pollen analysis was made based on the type of pollen, shape in polar and equatorial views, P/E ratio, exine thickness and sculpturing of pollen. In this study, two types of pollen aperture configuration known in the genus were observed i.e., trisyncolpate and bi-syncolpate. Pollen grains with microscabrate ornamentation were found in bi-syncolpate pollen for the first time. Pollen fertility estimation ranged from 87-95%, which shows that pollen flora of selected species is well established in Alpine zone.DOI: http://dx.doi.org/10.3329/bjpt.v19i1.10935Bangladesh J. Plant Taxon. 19(1): 1-5, 2012 (June)

A standard organic sample for evaluating the imaging capabilities of Scanning Electron Microscopes

1994 ◽  
Vol 52 ◽  
pp. 1020-1021
Author(s):  
Patrick Echlin
Keyword(s):  
Noble Metals ◽  
Pollen Grains ◽  
Polystyrene Spheres ◽  
Medical Laboratories ◽  
Organic Sample ◽  
Digital Scanning ◽  
Electron Microscopes ◽  
Beam Currents ◽  
Scanning Electron Microscopes ◽  
Scanning Electron

We have been evaluating several digital scanning electron microscopes prior to the eventual purchase of an instrument. Most manufacturers demonstrate the capabilities of their instruments by using test specimens such as ultra-thin films of sputtered or evaporated noble metals, semi-conductors and photo resists and highly polished multi-compositional specimens made up of light and heavy elements. The microscope we need will be used for imaging and analysis by people from bio-medical laboratories and we are particularly interested in the quality of images we can obtain at low voltages and low beam currents from uncoated and coated samples and whether the specimens suffer any contamination and beam damage during examination and analysis. We do not envisage working at accelerating voltages much above 15keV. We needed a standard organic sample which was stable and easy to prepare and representative of the type of material we would be examining in the microscope we will eventually purchase. After investigating polystyrene spheres and a number of more natural bio-organic samples, including coffee creamer, starch, flour, pollen grains and spores we discovered that spray dried milk is an ideal sample to use for these instrumental evaluations.

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