scholarly journals Spore morphology of Vaginularia Fée species (Pteridaceae) from South-Eastern Asia A.

2017 ◽  
Vol 7 (4) ◽  
pp. 231-233
Author(s):  
A. V. Vaganov ◽  
I. I. Gureyeva ◽  
A. A. Kuznetsov ◽  
R. S. Romanets
Keyword(s):  
Comparative Study ◽  
Smooth Surface ◽  
Polar Axis ◽  
Spore Morphology ◽  
Scanning Electronic Microscopy ◽  
Eastern Asia ◽  
Electronic Microscopy ◽  
South Eastern ◽  
Equatorial Diameter ◽  
Axis Length

A comparative study of spores of two species of Vaginularia (Vittarioideae, Pteridaceae) from South-Eastern – Vaginularia paradoxa (Fée) Mett. ex Miq. and V. trichoidea Fée – was performed by the method of scanning electronic microscopy (SEM). Spores are tetrahedral, trilete; they are very similar to each other in smooth surface and relatively narrow laesura arms. Differences between species are in shape of spores in proximal position (triangular with narrowly-rounded corners and concave sides in V. paradoxa and triangular with broadly-rounded corners and slightly concave sides in V. trichoidea), in length of laesura arms relative to the radius of the spore (laesura arms are about 0.75 of spore radius in V. paradoxa, and riches corners of spore in V. trichoidea) and in size of spore (spore of V. paradoxa are about 1.5 times more in equatorial diameter and 1.7 times more in polar axis length).

scholarly journals Spore morphology of Haplopteris C. Presl species (Vittarioideae, Pteridaceae) from China

2017 ◽  
Vol 7 (4) ◽  
pp. 290-294
Author(s):  
A. V. Vaganov ◽  
I. I. Gureyeva ◽  
A. A. Kuznetsov ◽  
R. S. Romanets
Keyword(s):  
Comparative Study ◽  
Spore Morphology ◽  
Scanning Electronic Microscopy ◽  
Electronic Microscopy

A comparative study of spores of four species of Haplopteris C. Presl, H. amboinensis (Fée) X.C. Zhang, H. forrestiana (Ching) E.H. Crane, H. linearifolia (Ching) X.C. Zhang, and H. mediosora (Hayata) X.C. Zhang, from China was performed using the method of scanning electronic microscopy (SEM). Spores of Haplopteris species are bilateral monolete ellipsoidal or ellipsoidal, but slightly narrowed in the middle. Perispore thin, easily breakable, smooth; exospore smooth, its surface is finely granulate or finely undulate (as seen at higher magnification). Haplopteris amboinensis have the largest spores (79.5×34.3×40.9 μм), H. mediosora – the smallest one 49.2×24.5×24.9 μм).

scholarly journals Spore morphology of Taenitis, Syngramma, and Austrogramme species (Pteridoideae, Pteridaceae) from South-Eastern Asia and Oceania. II

Turczaninowia ◽  
2021 ◽  
Vol 24 (3) ◽  
pp. 36-51
Author(s):  
Alexey V. Vaganov ◽  
Irina I. Gureyeva ◽  
Alexander I. Shmakov ◽  
Alexander A. Kuznetsov ◽  
Roman S. Romanets
Keyword(s):  
Microscopy Study ◽  
Electron Microscopy Study ◽  
Spore Morphology ◽  
Eastern Asia ◽  
Plane Convex ◽  
Second Stage ◽  
South Eastern ◽  
Equatorial Diameter ◽  
Distal Side ◽  
Scanning Electron

This paper continues consideration of the spores of three paleotropical fern genera – Taenitis, Syngramma, and Austrogramme (Pteridoideae, Pteridaceae) from South-Eastern Asia and Oceania. At the second stage, we carried out a comparative scanning electron microscopy study of spores of three species of Austrogramme, four species of Syngramma, and six species of Taenitis and added information about previously studied spores of seven species of these genera. Spores of all examined species are trilete, tetrahedral or tetrahedral-globose with convex to hemispherical distal side and plane, convex or conical proximal side. The spores of Austrogramme species are the smallest, simplest in ornamentation and similar to each other. Sculpture of the proximal and distal sides are microverrucate, the surface of the spores is covered by granular deposits. Spores of most Syngrammaspecies are very similar to spores of Austrogramme species in shape and surface sculpture: their distal and proximal surfaces are microverrucate, whereas the spores of S. borneensis and S. cartilagidens have the low-tuberculate sculpture. Spores of Taenitis species are very different from the spores of Austrogramme and Syngramma. Seven of nine studied species have spores with well-expressed cingulum (T. blechnoides, T. cordata, T. diversifolia, T. interrupta, T. luzonica, T. obtusa, and T. requiniana), three species (T. cordata, T. hookeri, and T. pinnata) have spores with prominent laesural ridges. The spores have well-expressed ornamentation – tuberculate, baculate, rugate, tuberculate-rugate. The most conspicuous character of the ornamentation of spore surfaces is the presence of rodlets associated with sculpture elements. The densest rodlets are characteristic of Taenitis diversifolia, T. luzonica, T. obtusa, and T. requiniana. Spore size (equatorial diameter) ranges on average between 22 μm and 37 μm in Austrogramme, between 27 μm and 41 μm in Syngramma, and between 26 and 51 μm in Taenitis species.

scholarly journals Comparative study of the oospore morphology of two populations of a rare species Chara baueri A. Braun in Cedynia (Poland) and Batzlow (Germany)

2012 ◽  
Vol 81 (2) ◽  
pp. 131-136 ◽  
Author(s):  
Andrzej Pukacz ◽  
Patrycja Boszke ◽  
Mariusz J. Pełechaty ◽  
Uwe Raabe
Keyword(s):  
Comparative Analysis ◽  
Comparative Study ◽  
Rare Species ◽  
Polar Axis ◽  
German Population ◽  
Apical Pole ◽  
Equatorial Diameter ◽  
Habitat Differentiation ◽  
Two Populations ◽  
Species Ecology

Morphological features of oospores of <em>Chara baueri </em>A. Braun, one of the rarest charophyte species worldwide, were studied based on 100 oospores collected from a small and temporarily dried mid-field pond near Cedynia, Western Poland. This is the first Polish and fifth presently known locality of this species. For comparison 67 oospores from a German population (similar pond localized near Batzlow, Germany) were also measured. So far, data on morphology of <em>C. baueri </em>oospores as well as the species ecology are limited. The only more detailed study of oospores for this species was earlier performed on 15 oospores from Kazakhstan. Largest polar axis (<em>LPA</em>, length), largest equatorial diameter (<em>LED</em>, width), isopolarity index (<em>ISI </em>= <em>LPA</em>/<em>LED </em>× 100), number of ridges, width of fossa, distance from apical pole to <em>LED </em>(<em>AND</em>) and anisipolarity index (<em>ANI </em>= <em>AND</em>/<em>LPA </em>× 100) were measured. The comparative analysis revealed that the oospores from Poland are generally bigger and more prolate than the Ger­man ones. The differences for most of studied parameters were statistically significant. The finding is discussed in the context of habitat differentiation of both studied sites. Moreover, the results obtained of oospore measurements for both populations differs from most of the data known so far from the literature.

A Comparative Study of the Smear Layer Removal Using Scanning Electronic Microscopy and Atomic Force Microscopy

2012 ◽  
Vol 7 (1) ◽  
pp. 21-25
Author(s):  
Maíra Prado ◽  
Heloisa Gusman ◽  
BrendaP. F. A. Gomes ◽  
RenataA. Simão
Keyword(s):  
Atomic Force Microscopy ◽  
Comparative Study ◽  
Smear Layer ◽  
Scanning Electronic Microscopy ◽  
Electronic Microscopy ◽  
Force Microscopy ◽  
Layer Removal ◽  
Atomic Force

scholarly journals SPORE MORPHOLOGY OF SOME BRYOPHYTA IN EGYPT

2021 ◽  
Vol 21 (no 1) ◽  
Author(s):  
Gamal M. A. Lashin ◽  
Usama Y. Abo-Salama ◽  
Ekram M. Abd El Haliem ◽  
Gehad A. A. Hamouda ◽  
Gehad A. A. Hamouda ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Light Microscopy ◽  
Polar Axis ◽  
Spore Morphology ◽  
Funaria Hygrometrica ◽  
Spore Ornamentation ◽  
Equatorial Diameter ◽  
Spore Ultrastructure ◽  
Scanning Electron

In this work, spore morphology of eight species, Tortula muralis, Tortula brevissima, Aloina brevirostris, Syntrichia leavipila, Microbryum clavallianum (Pottiaceae); Funaria hygrometrica, Entosthodon muhlenbergii, Entosthodon attenuates (Funariaceae); were examined by Light microscopy (LM) and Scanning electron microscopy (SEM). All spores are small; the length of polar axis is between 7.5 ?m and 18.5 ?m, equatorial diameter is between 10.5 ?m and 27 ?m. The smallest spores of them are Tortula brevissima and the biggest spores of them are Entosthodon attenuates. The shapes of the spores are determined as suboblate for Tortula muralis, Aloina brevirostris, Syntrichia leavipila, and oblate for Tortula brevissima, Funaria muhlenbergii, Funaria hygrometrica, Entosthodon attenuates. The ornamentation observed can be regulate, verrucate- regulate, baculate, verrucate, clavate- foveolate, clavate, foveolate- psilate on the distal pole, spore ornamentation of the proximal face is different or less complex than the distal face. We can concluded that the spore ultrastructure give important role for identification and taxonomic significant.

scholarly journals СРАВНИТЕЛЬНОЕ ИССЛЕДОВАНИЕ МОРФОЛОГИИ СПОР РОДОВ ПОДСЕМЕЙСТВА CRYPTOGRAMMOIDEAE

2016 ◽  
Vol 6 (3) ◽  
pp. 333-346
Author(s):  
A. V. Vaganov
Keyword(s):  
Comparative Study ◽  
Morphological Characters ◽  
Equatorial Position ◽  
Scanning Electronic Microscopy ◽  
Electronic Microscopy ◽  
Spore Form ◽  
Distal Side

<p>Using the method of scanning electronic microscopy (SEM), a comparative study of twelve representatives of subfamily <em>Cryptogrammoideae </em>S.Linds. family <em>Pteridaceae </em>E.D.M.Kirchn. was carried out. A comparative study of morphological characters of investigated spores has revealed characters that allow considering the relatedness of the studied species to one subfamily – Cryptogrammoideae. These characters include: spore form is roundish-triangular, lociniate in proximal-polar and distal-polar positions; spore contour is low-crenate to smooth; distal side of the spore in an equatorial position is convex; rays of laesura are straight, raised over a sporoderm surface; exosporium is clearly defined from fine-granulate to verrucate.</p>

Interspecific and intraspecific variation in pollen morphology in four species of Salix

1990 ◽  
Vol 68 (7) ◽  
pp. 1497-1501 ◽  
Author(s):  
K. H. Kim ◽  
L. Zsuffa ◽  
A. Kenney ◽  
A. Mosseler
Keyword(s):  
Intraspecific Variation ◽  
Pollen Morphology ◽  
Polar Axis ◽  
Interspecific Variation ◽  
Pollen Grain ◽  
Equatorial Diameter ◽  
Specific Variation ◽  
Axis Length ◽  
Interspecific And Intraspecific Variation ◽  
Morphology Parameters

A study of inter- and intra-specific variation in pollen grain polar axis length, pollen equatorial diameter, colpus length, and colpus width in Salix discolor, S. eriocephala, S. lucida, and S. petiolaris demonstrated significant interspecific variation, unequal distances between the species, and various degrees of intraspecific variation. The taxonomic value of the pollen morphology parameters measured was found to vary according to species. A relationship between the pollen parameters measured to the ploidy level of the species is hypothesized. Key words: Salix, pollen, taxonomy.

scholarly journals First record of Pachycrocuta brevirostris (Gervais, 1850) from Ukraine on the background of the European occurrence of the species

2021 ◽  
Author(s):  
Adrian Marciszak ◽  
Yuriy Semenov ◽  
Piotr Portnicki ◽  
Tamara Derkach
Keyword(s):  
Body Size ◽  
First Record ◽  
The Body ◽  
Crocuta Crocuta ◽  
Early Pleistocene ◽  
Eastern Asia ◽  
South Eastern

AbstractCranial material ofPachycrocuta brevirostrisfrom the late Early Pleistocene site of Nogaisk is the first record of this species in Ukraine. This large hyena was a representative of the Tamanian faunal complex and a single specialised scavenger in these faunas. The revisited European records list ofP.brevirostrisdocumented the presence of this species in 101 sites, dated in the range of 3.5–0.4 Ma. This species first disappeared in Africa, survived in Europe until ca. 0.8–0.7 Ma, and its last, relict occurrence was known from south-eastern Asia. The main reason of extinction ofP.brevirostrisprobably was the competition withCrocuta crocuta. The cave hyena was smaller, but its teeth were proportionally larger to the body size, better adapted to crushing bones and slicing meat, and could also hunt united in larger groups.

Sign in / Sign up

Export Citation Format

Share Document