Comparative morphology of Cladopus (including Torrenticola, Podostemaceae) from East Asia to north-eastern Australia

2002 ◽  
Vol 50 (6) ◽  
pp. 725 ◽  
Author(s):  
Rolf Rutishauser ◽  
Evelin Pfeifer
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
East Asia ◽  
Lateral Roots ◽  
Comparative Morphology ◽  
Developmental Morphology ◽  
Eastern Australia ◽  
North Eastern ◽  
Scanning Electron

Cladopus (with 12 or less species) is an Asian and Australian genus of Podostemaceae–Podostemoideae. They are haptophytes that grow in rivers. The developmental morphology and anatomy of Cladopus austro-osumiensis Y.Kadono & N.Usui, C. austrosatsumensis Koidzumi, C. chinensis Chao, C. japonicus Imamura and C. queenslandicus [Domin] C.D.K. Cook & Rutish. (syn. Torrenticola queenslandica [Domin] Domin ex Steenis) are studied by scanning electron microscope and microtome. The architecture of the examined species fits with the bauplan known from other Asian Podostemoideae. Rosulate shoots arise in zigzag patterns or as opposite pairs from narrow or broad green ribbons which may be interpreted as adhesive creeping roots. Cladopus is the only podostemaceous genus known with both endogenous and exogenous lateral roots along the mother root. Exogenous lobes (which may develop into daughter roots) are next to the sites of root-borne shoots which, finally, give rise to terminal flowers. Cladopus species have the following features (synapomorphies) in common: (1) leaves on older and reproductive shoots with one or two median, long filaments (caducous) and 1–4 lateral short lobes (persistent) on either side of the leaf, which are called stipules; (2) spathella (i.e. mantle-like flower cover) with an apical two-tipped papilla; (3) spathella splitting more or less circumscissilely; (4) capsules globose or nearly so, smooth or with three faint ribs per valve.

Comparative morphology of the hammer-shaped penisesof two species of opisthobranch mollusсs of the genus Philine Ascanius, 1772 (Opisthobranchia: Cephalaspidea: Philinidae)

2009 ◽  
Vol 18 (1) ◽  
pp. 5-10
Author(s):  
E.M. Chaban ◽  
E.V. Soldatenko
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Comparative Morphology ◽  
Copulatory Apparatus ◽  
Male Copulatory Apparatus ◽  
Morphological Differences ◽  
Scanning Electron

Penises of two species of opisthobranch mollusks of Philine were first examined with use of a scanning electron microscope: Ph. aperta (Linnaeus, 1767) and P. finmarchica M. Sars, 1858. This study revealed significant morphological differences. The morphology of male copulatory apparatus of these species is discussed

Microvascular Architecture of the Lingual Papillae in Rabbits.

1998 ◽  
Vol 4 (S2) ◽  
pp. 1058-1059
Author(s):  
T. S. Masuko ◽  
B. König ◽  
B.R. Schmidt
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Blood Vessels ◽  
Comparative Morphology ◽  
Lingual Papillae ◽  
Microcorrosion Casts ◽  
Microvascular Architecture ◽  
Scanning Electron

The comparative morphology of the tongue microvasculature has been studied in different animals, such as in man (Okada et al, 1993, Matsukawa and Okada, 1994), rats (Nagato et al., 1989, Ohshima, et al, 1990, Selliseth and Slvig, 1993), dogs (Kishi et al, 1986, Kishi et al 1988), goats(Scala et al, 1992), monkeys (Patterson, et al, 1992, Okada et al, 1993, Matsukawa and Okada, 1994), marmosets (Okada et al, 1993, Matsukawa and Okada, 1994) and shrews (Okada et al, 1993, Matsukawa and Okada, 1994), but apparently none in rabbits. The disposition of the blood vessels of the rabbit's lingual papillae were studied by injecting them with Mercox resin and posterior corrosion, thus obtained microcorrosion casts were observed in the scanning electron microscope.Male and adult rabbits were used to obtain our models. After perfusion with heparin 0,1M, pH 7.4 and glutaraldehyde, both in the same buffer, the vessels were filled as reported above.

Morphology of the outer integument in three primitive angiosperm families

1995 ◽  
Vol 73 (8) ◽  
pp. 1242-1249 ◽  
Author(s):  
Ryoko Imaichi ◽  
Masahiro Kato ◽  
Hiroshi Okada
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Outer Integument ◽  
Developmental Morphology ◽  
Primitive Angiosperms ◽  
Primitive State ◽  
Scanning Electron ◽  
Cananga Odorata

Scanning electron microscope examinations were performed to characterize the developmental morphology of the outer integument in several species of the three families Annonaceae (Cananga odorata var. fruticosa, Goniothalamus macrophyllus, and Stelechocarpus burahol), Eupomatiaceae (Eupomatia laurina), and Winteraceae (four Tasmannia species). In all species examined, the inner integument arises as an annular ring, but the outer integument initiates as a semiannular outgrowth interrupted on the concave side of the funiculus; the outer integument then becomes hood-shaped. The inner integument overtops the outer one at maturity, and the micropyle consists only of an endostome. Data from the present and previous studies support the hypothesis that the outer integument is hood-shaped in magnolialean angiosperms and that the bilaterally symmetrical, bladelike outer integument is homologous with the ovuliferous sporophyll of the glossopterids. The micropyle consisting of an endostome might be in a primitive state, compared with a bistomic one. Key words: developmental morphology, integument, micropyle, phylogenesis, primitive angiosperms, scanning electron microscopy.

The Alteration of the Pore Spaces in Sandstones

1973 ◽  
Vol 31 ◽  
pp. 210-211
Author(s):  
R. E. Ferrell ◽  
G. G. Paulson
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
The Other ◽  
Coarse Grained ◽  
Depositional Fabric ◽  
Soluble Components ◽  
Scanning Electron ◽  
Shape And Size

The pore spaces in sandstones are the result of the original depositional fabric and the degree of post-depositional alteration that the rock has experienced. The largest pore volumes are present in coarse-grained, well-sorted materials with high sphericity. The chief mechanisms which alter the shape and size of the pores are precipitation of cementing agents and the dissolution of soluble components. Each process may operate alone or in combination with the other, or there may be several generations of cementation and solution.The scanning electron microscope has ‘been used in this study to reveal the morphology of the pore spaces in a variety of moderate porosity, orthoquartzites.

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