scholarly journals Taxonomic significance of spermoderm pattern in Cucurbitaceae

2013 ◽  
Vol 20 (1) ◽  
pp. 61-65
Author(s):  
M. Ajmal Ali ◽  
Fahad M.A. Al-Hemaid ◽  
Arun K. Pandey ◽  
Joongku Lee
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Cucumis Melo ◽  
Taxonomic Significance ◽  
Citrullus Colocynthis ◽  
Benincasa Hispida ◽  
The Family ◽  
Plant Taxon ◽  
Relationship Of ◽  
Scanning Electron

Studies on spermoderm using scanning electron microscope (SEM) were undertaken in 12 taxa under 11 genera of the family Cucurbitaceae sampled from India, China and Korea. The spermoderm pattern in the studied taxa varies from rugulate, reticulate to colliculate type. The spermoderm shows rugulate type in Benincasa hispida and Sicyos angulatus; reticulate type in Citrullus colocynthis, Cucumis melo var. agrestis, Diplocyclos palmatus, Hemsleya longivillosa, Luffa echinata, Momordica charantia, M. cymbalaria, Schizopepon bryoniifolius, and Trichosanthes cucumerina; and colliculate type  in Gynostemma laxiflorum. The present study clearly reveals that the testa features greatly varies across the genera which can be used as micromorphological markers for identification as well as character states for deducing relationship of the taxa within the family.DOI: http://dx.doi.org/10.3329/bjpt.v20i1.15465Bangladesh J. Plant Taxon. 20(1): 61-65, 2013 (June)

Inner surface sculpture patterns of cuticles in Cupressaceae

1983 ◽  
Vol 61 (4) ◽  
pp. 1222-1231 ◽  
Author(s):  
F. A. Oladele
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Taxonomic Significance ◽  
Generic Level ◽  
Surface Sculpture ◽  
The Family ◽  
Inner Surface ◽  
Micromorphological Characters ◽  
Scanning Electron

Chemically and enzymatically isolated cuticles in the family Cupressaceae were examined with a scanning electron microscope (SEM). The inner surface of the cuticles has many micromorphological characters which show interspecific and intergeneric variations. Those above the generic level are less apparent. Taxonomic significance of the sculpture patterns is discussed.

Cypsela morphology of Cirsium sect. Cirsium (Asteraceae) taxa in Turkey

Biologia ◽  
2011 ◽  
Vol 66 (6) ◽  
Author(s):  
Serkan Köstekci ◽  
Turan Arabaci
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Surface Characteristics ◽  
Taxonomic Significance ◽  
Sem Investigation ◽  
Scanning Electron

AbstractIn this study, the cypsela morphology of 21 (14 species) of the 28 (17 species) Turkish Cirsium Mill. sect. Cirsium (Asteraceae) taxa was examined by stereomicroscope and scanning electron microscope (SEM). The shapes of cypselas are oblong, obovate, narrowly obovate and oblanceolate. The taxa were divided into 7 main types according to the results of SEM investigation on cypsela surface characteristics as: scalariform, ribbed, scrobiculate-ribbed, scrobiculate, scrobiculate-reticulate, reticulate and bireticulate. Taxonomic significance of cypsela morphology is discussed. It is shown that cypsela features can be used as distinguishing characteristics in some Cirsium sect. Cirsium species.

scholarly journals Polyphyly and homoplasic structures in rhizosolenioid diatom genera: a review

2019 ◽  
Vol 152 (2) ◽  
pp. 142-149
Author(s):  
Richard W. Jordan ◽  
Matt P. Ashworth ◽  
Yuki Uezato ◽  
Schonna R. Manning
Keyword(s):  
Electron Microscope ◽  
Literature Review ◽  
Scanning Electron Microscope ◽  
Strong Support ◽  
Molecular Data ◽  
Literature Survey ◽  
Single Family ◽  
The Family ◽  
Family Level ◽  
Scanning Electron

Background and aims – Traditionally, extant rhizosolenioid diatom genera have been placed in a single family, the Rhizosoleniaceae. However, preliminary molecular data suggested that the family might be polyphyletic. Therefore, a literature review of the morphological, ultrastructural and molecular data of the rhizosolenioid genera was undertaken. Methods – In addition to the literature survey, the location of the rimoportula in a number of rhizosolenioid genera was investigated by breaking the valves and observing the fragments in the scanning electron microscope. Key results – The data provides strong support for the previous separation of Proboscia and Rhizosolenia at the family level (Probosciaceae vs. Rhizosoleniaceae), with the rimoportula being located at the tip of the proboscis in Proboscia, or with an internal labia at the base of the hollow tubular rimoportula (= spine or process) in Rhizosolenia and Pseudosolenia. Conclusions – The data suggests that a number of rhizosolenioid genera should be transferred to other families, and that gene sequences of two genera (Dactyliosolen and Neocalyptrella) are needed as their morphological features differ markedly from those of the Rhizosoleniceae s. str. (Rhizosolenia, Guinardia, Pseudosolenia).

scholarly journals Biometrics of the sporangia and spores of the Parablechnum cordatum complex (Blechnaceae, Polypodiopsida)

2021 ◽  
Vol 45 ◽  
pp. e73655
Author(s):  
Aleksandra Patrjcia Wal ◽  
Sonia Molino ◽  
Antonio Murciano ◽  
Carmen Prada ◽  
José María Gabriel y Galán
Keyword(s):  
Electron Microscope ◽  
Discriminant Analysis ◽  
Scanning Electron Microscope ◽  
Analysis Of Variance ◽  
Pacific Region ◽  
Taxonomic Significance ◽  
Biometric Analysis ◽  
Equatorial Diameter ◽  
Number Of Cells ◽  
Scanning Electron

Parablechnum is the most diverse genus of Blechnaceae (ca. 65 species), with a pantropical distribution and two centers of diversity, in America and in the Austro-Pacific region. The species are dimorphic, with often erect rhizomes and rhizomatic scales, 1-pinnate fronds, with truncate blade at base, conform apex and stalked pinnae. This group presents many taxonomic problems, needing more detailed studies to resolve these conflicts of separation between species. This work deals with the American complex of P. cordatum in which the species P. cordatum, P. schiedeanum, P. chilense, P. falciforme and Blechnum varians are included. A biometric analysis of sporangia and spores, important taxonomic structures in the distinction of ferns, has been carried out. The data were subjected to a one-way analysis of variance and a discriminant analysis. In addition, the spores were observed under a scanning electron microscope to study their ornamentation. Of the characters we have studied thickness of the arcus, number of cells in the arcus, number of cells in the hypostome and major equatorial diameter of the spore have statisticalParablechnum is the most diverse genus of Blechnaceae (ca. 65 species), with a pantropical distribution and two centers of diversity, in America and in the Austro-Pacific region. The species are dimorphic, with often erect rhizomes and rhizomatic scales, 1-pinnate fronds, with truncate blade at base, conform apex and stalked pinnae. This group presents many taxonomic problems, needing more detailed studies to resolve these conflicts of separation between species. This work deals with the American complex of P. cordatum in which the species P. cordatum, P. schiedeanum, P. chilense, P. falciforme and Blechnum varians are included. A biometric analysis of sporangia and spores, important taxonomic structures in the distinction of ferns, has been carried out. The data were subjected to a one-way analysis of variance and a discriminant analysis. In addition, the spores were observed under a scanning electron microscope to study their ornamentation. Of the characters we have studied thickness of the arcus, number of cells in the arcus, number of cells in the hypostome and major equatorial diameter of the spore have statistically supported taxonomic significance and are therefore useful for species separation.  

scholarly journals Achene micromorphology of seven taxa of Achillea L. (Asteraceae) from Turkey

2014 ◽  
Vol 21 (1) ◽  
pp. 19-25 ◽  
Author(s):  
Tulay Aytas Akcin ◽  
Adnan Akcin
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Cell Distribution ◽  
Plant Taxon ◽  
Micromorphological Characters ◽  
Scanning Electron

Micromorphological characters of achenes in seven taxa of Turkish Achillea L. (Asteraceae) were investigated using stereomicroscope and scanning electron microscope (SEM). Some morphological descriptions of achenes were given for each species. A.biserrata Bieb. has the biggest (0.69±0.092 x 2.01±0.252 mm) and A. grandiflora Friv. has the smallest (0.30±0.018 x 1.12±0.058 mm) achenes. The achenes are oblong-lanceolate in A.biserrata and A. teretifolia Willd. and they are oblong in the remaining taxa. In surface sculpturing, the ornamentation and slime cell distribution varied among the taxa. However, A. biebersteinii Afan. has distinct slime cells forming groups scattered over the achene surface. Mature achenes are ribbed and glabrous in all studied taxa. A. biserrata has distinct carpopodium structure.DOI: http://dx.doi.org/10.3329/bjpt.v21i1.19253Bangladesh J. Plant Taxon. 21(1): 19-25, 2014 (June)

Meschia zoui sp. nov., first representative of the family Meschiidae from China (Hemiptera: Heteroptera: Lygaeoidea)

Zootaxa ◽  
2019 ◽  
Vol 4603 (1) ◽  
pp. 172
Author(s):  
CUIQING GAO ◽  
M. B. MALIPATIL
Keyword(s):  
Electron Microscope ◽  
New Species ◽  
Scanning Electron Microscope ◽  
Southern China ◽  
The Family ◽  
Cuticular Structures ◽  
A New Species ◽  
Scanning Electron

All the species of the family Meschiidae, known until now only from India and Australia, are reviewed. A new species, Meschia zoui sp. nov. from southern China, is described as the first representative of this family from China, also its cuticular structures are studied using the scanning electron microscope. A key to all species of Meschiidae is provided, along with a re-description of Meschia quadrimaculata Distant.

Glugea hertwigi. [Descriptions of Fungi and Bacteria].

2019 ◽  
Author(s):  
D. W. Minter
Keyword(s):  
Electron Microscope ◽  
North America ◽  
Scanning Electron Microscope ◽  
Freshwater Fish ◽  
Rough Surface ◽  
Geographical Distribution ◽  
Fish Parasite ◽  
Brackish Waters ◽  
The Family ◽  
Scanning Electron

Abstract This article describes the morphology, morphometrics, and geographical distribution of the freshwater fish parasite Glugea hertwigi infecting fish of the family Osmeridae (smelts) in freshwater of north temperate to boreal Europe and North America and nearby seas and brackish waters. Using a scanning electron microscope, spores of this species have a rough surface with loose folds and longitudinal wrinkles. This distinguishes them from spores of G. anomala. This parasite can be found in Canada, USA, Finland, Germany, and Russia.

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