A comparison of new microscopical techniques for the study of fossil spore wall ultrastructure

1991 ◽  
Vol 67 (1-2) ◽  
pp. 133-139 ◽  
Author(s):  
Andrew C. Scott ◽  
Alan R. Hemsley
Keyword(s):  
Spore Wall ◽  
Wall Ultrastructure

The fine structure and selected histochemistry of ungerminated basidiospores of Agrocybe acericola

1996 ◽  
Vol 74 (5) ◽  
pp. 780-787 ◽  
Author(s):  
Donald G. Ruch ◽  
Kiki Nurtjahja
Keyword(s):  
Fine Structure ◽  
Acid Phosphatase ◽  
Glyoxylate Cycle ◽  
Outer Wall ◽  
Spore Wall ◽  
Malate Synthase ◽  
Marker Enzyme ◽  
Wall Ultrastructure ◽  
Membrane Bound ◽  
The Glyoxylate Cycle

The basidiospore wall of Agrocybe acericola is composed of two distinct layers that are continuous around the spores. At the germ pore, the outer wall is very thin and the inner wall becomes thicker. The plasma membrane is appressed to the inner wall and lacks distinct invaginations. The protoplasm is densely packed with ribosomes. Spores contain very little lipid distributed at each end. Mitochondria are well defined and distributed throughout the cytoplasm. Spores are binucleate, with the two nuclei lying on a line nearly perpendicular to the long axis of the cell. Various sizes of single membrane-bound vacuoles are widely distributed in the cytoplasm. These vacuoles were shown to contain acid phosphatase, indicating lysosomal activity. Microbody-like organelles are observed, which are probably glyoxysomes, since assays of malate synthase, a marker enzyme of the glyoxylate cycle, are positive. Keywords: Agrocybe, spore wall ultrastructure, basidiospore ultrastructure, glyoxylate cycle, malate synthase, acid phosphatase.

Trichocintractia, a new genus for Cintractia utriculicola (Ustilaginales)

1995 ◽  
Vol 73 (7) ◽  
pp. 1089-1096 ◽  
Author(s):  
Meike Piepenbring
Keyword(s):  
Cell Surface ◽  
Key Words ◽  
New Genus ◽  
Spore Wall ◽  
Irregular Surface ◽  
Wall Ultrastructure ◽  
Spherical Cells

Cintractia utriculicola, which produces sori in the spikelets of Rhynchospora spp., differs from typical Cintractia species by long sterile cells at the base of the sorus instead of a mycelial stroma with sporogenous pockets and by a persistent peridium of spherical cells. While in other Cintractia species the ornamentation of the teliospores originates at an undulated plasmalemma as an irregular surface of the exosporium, in Cintractia utriculicola warts develop on a smooth cell surface and are loosely connected to the exosporium. A new genus, Trichocintractia, is proposed for Cintractia utriculicola. Key words: Ustilaginales, Cintractia, Cintractia utriculicola, Trichocintractia utriculicola, soral morphology, spore wall ultrastructure.

SPORE WALL ULTRASTRUCTURE IN FOUR SPECIES OF THE LIVERWORT RICCIA

1979 ◽  
Vol 66 (5) ◽  
pp. 546-556 ◽  
Author(s):  
M. P. Steinkamp ◽  
W. T. Doyle
Keyword(s):  
Spore Wall ◽  
Wall Ultrastructure

SPORE WALL ULTRASTRUCTURE OF PROTOSALVINIA

1987 ◽  
Vol 74 (3) ◽  
pp. 437-443 ◽  
Author(s):  
Wilson A. Taylor ◽  
Thomas N. Taylor
Keyword(s):  
Spore Wall ◽  
Wall Ultrastructure

Spore Wall Ultrastructure of the Lower Devonian Zosterophylls Renalia hueberi and Zosterophyllum divaricatum

2013 ◽  
Vol 174 (9) ◽  
pp. 1302-1313 ◽  
Author(s):  
Patricia G. Gensel ◽  
Charles H. Wellman ◽  
Wilson A. Taylor
Keyword(s):  
Lower Devonian ◽  
Spore Wall ◽  
Wall Ultrastructure

scholarly journals Spore wall ultrastructure inAnogrammaspecies (Pteridaceae) from Argentina

Grana ◽  
2004 ◽  
Vol 43 (4) ◽  
pp. 231-237 ◽  
Author(s):  
Juan Ramos Giacosa ◽  
Marta Morbelli ◽  
Gabriela Giudice
Keyword(s):  
Spore Wall ◽  
Wall Ultrastructure

Spore wall ultrastructure of Polypodiaceae from north-western Argentina

Grana ◽  
2010 ◽  
Vol 49 (3) ◽  
pp. 204-214 ◽  
Author(s):  
Marta A. Morbelli ◽  
Gabriela E. Giudice
Keyword(s):  
Spore Wall ◽  
Wall Ultrastructure ◽  
North Western

Spore wall ultrastructure in the liverwort Fossombronia longiseta

1984 ◽  
Vol 62 (9) ◽  
pp. 1871-1879 ◽  
Author(s):  
M. P. Steinkamp ◽  
W. T. Doyle
Keyword(s):  
Spore Wall ◽  
Dense Material ◽  
White Line ◽  
Electron Dense Material ◽  
Transmission Electron ◽  
Wall Ultrastructure ◽  
Electron Microscopes ◽  
Electron Lucent

Mature spores of Fossombronia longiseta (Metzgeriales, Codoniaceae) were examined with both scanning and transmission electron microscopes. Sporoderms are highly sculptured. The distal face markings consist of parallel ridges (cristae) or spines. The flattened proximal face has a series of short spinelike cristae, and a triradiate ridge mark sometimes is apparent. In section, the sporoderm consists of an intine and a two-layered exine. The inner exine layer consists of two lamellae, each of which contains a series of long, thin (3–4 nm), closely spaced, electron-lucent subunits; the subunits are separated by electron-dense material. The more or less solid outer exine consists of highly irregularly shaped lamellae, which also have a "white line" component. Amorphous, electron-dense material permeates these lamellae and fills the channels between the lamellae. The intine and much of the electron-dense material of the exine is removed by acetolysis. Spore wall ultrastructure in this species is complex compared with other species of the Metzgeriales and Jungermanniales that have been studied so far.

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