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.

A taxonomic reappraisal of the genus Ceriosporopsis based on ultrastructure

1994 ◽  
Vol 72 (10) ◽  
pp. 1550-1559 ◽  
Author(s):  
M. Yusoff ◽  
E. B. G. Jones ◽  
S. T. Moss
Keyword(s):  
Key Words ◽  
New Genus ◽  
Marine Fungi ◽  
Spore Wall ◽  
Ultrastructural Studies ◽  
The Difference

This paper reports results of ultrastructural studies of ascospores and their appendages in Ceriosporopsis caduca, Ceriosporopsis circumvestita, and Ceriosporopsis capillacea. Ceriosporopsis caduca and C. capillacea have polar appendages that arise as outgrowths of the spore wall. The exosporium, which initially extends over the polar appendages, later forms a collar at their base. In C. circumvestita, the sheath is mesosporial in origin and is chambered; an exosporium is absent, and there is no collar at the base of the appendage. Because of the difference in ascospore appendage structure, C. circumvestita is transferred to a new genus Lautisporopsis. The taxonomy of the remaining species of Ceriosporopsis is reviewed, and comparisons are made with Bovicornua intricata. Key words: Ascomycotina, marine fungi, taxonomy, ultrastructure, Lautisporopsis.

Applanodictyosporous Pleosporales: Clathrospora, Comoclathris, GraphyIlium, Macrospora, and Platysporoides

1992 ◽  
Vol 70 (8) ◽  
pp. 1617-1658 ◽  
Author(s):  
R. A. Shoemaker ◽  
C. E. Babcock
Keyword(s):  
Key Words ◽  
New Genus ◽  
New Family ◽  
The Family

Six genera of the order Pleosporales are revised taxonomically. Although five genera have unusual applanate ascospores, they are members of three different families. Clathrospora (10 species, 2 new), Comoclathris (21 species, 7 new), and Macrospora (3 species) are placed in a new family Diademaceae in which the ascoma opening is a characteristic flat circular lid. Diademosa, a new genus with one species with terete ascospores is placed in Diademaceae. Graphyllium (3 species) is placed in the family Hysteriaceae characterized by hysterothecia with a slit-like opening. Platysporoides n.gen. (11 species, 1 new) is maintained in the Pleosporaceae because of the terete pored beak of the ascomata. Key words: Pleosporales, applanate ascospores, Clathrospora, Comoclathris, Macrospora, Diademosa, Graphyllium, Platysporoides.

scholarly journals Chlorophytum nepalense (Lindley) Baker (Liliaceae) - A new angiospermic record for Bangladesh

1970 ◽  
Vol 37 (2) ◽  
pp. 193-194 ◽  
Author(s):  
Sumona Afroz ◽  
Ershad Tutul ◽  
Mohammad Zashim Uddin ◽  
Md Abul Hassan
Keyword(s):  
Key Words ◽  
New Record ◽  
New Genus ◽  
Perennial Herb ◽  
New Genus And Species ◽  
The Family

Chlorophytum nepalense (Lindley) Baker, a perennial herb, belonging to the family Liliaceae has been described and illustrated as a new genus and species record for Bangladesh. Key words: Chlorophytum nepalense, New record, Bangladesh doi:10.3329/bjb.v37i2.1730 Bangladesh J. Bot. 37(2): 193-194, 2008 (December)

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.

scholarly journals Tirisporella gen.nov., an ascomycete from the mangrove palm Nypa fruticans

1996 ◽  
Vol 74 (9) ◽  
pp. 1487-1495 ◽  
Author(s):  
E. B. G. Jones ◽  
S. J. Read ◽  
S. T. Moss ◽  
Siti Alsysh Alias ◽  
K. D. Hyde
Keyword(s):  
Basal Cell ◽  
New Genus ◽  
Spore Wall ◽  
The Philippines ◽  
Type Specimens ◽  
Leaf Petiole ◽  
New Name ◽  
Nypa Fruticans ◽  
Apical Appendage ◽  
Appendage Formation

Trisporella beccariana comb.nov. is redescribed from decomposing leaf petiole (or rachis) bases of Nypa fruticans recently collected in Malaysia and the Philippines. The superficial ascomata bear bitunicate asci with (3–)5(–7)-septate ascospores that are brown and verrucose, except for the prominent hyaline basal cell, and furnished with a distinctive apical appendage that arises from the spore wall. The ultrastructure of the fungus is contrasted with that of species of Corollospora and Corallicola, with particular reference to the mode of ascospore appendage formation. The species was originally described from a Sarawak collection as Sphaeria beccariana and later transferred to Melanomma and given the new name Melanomma cesatianum. Gibberidea nipae is a synonym. The recent collections were compared with type specimens. The fungus is not properly placed in Melanomma or Gibberidea or other known genera and a new genus Tirisporella is described. Keywords: Ascomycotina, ascospore appendage, mangrove fungus, taxonomy, ultrastracture.

Binding of staphylococcal cell surface polysaccharide to human fibrinogen

1990 ◽  
Vol 36 (3) ◽  
pp. 206-210
Author(s):  
Toshichika Ohtomo ◽  
Tsugiaki Kobayashi ◽  
Yukio Ohshima ◽  
Yukio Usui ◽  
Masaru Suganuma ◽  
...  
Keyword(s):  
Staphylococcus Aureus ◽  
Cell Surface ◽  
Binding Site ◽  
Key Words ◽  
Active Substance ◽  
Soft Agar ◽  
Alkaline Ph ◽  
Human Fibrinogen ◽  
Surface Polysaccharide ◽  
Alkaline Range

The interaction between the binding site of a polysaccharide (called compact colony forming active substance (CCFAS)), obtained from the cell surface of a strain of Staphylococcus, and human fibrinogen (HF) was investigated. The CCFAS was found to bind specifically to both the Bβ and γ chains of HF at pH 7.0 and 8.0, and the Aα chain at pH 5.0. The binding of CCFAS with fibrinogen fragments obtained by digestion with plasmin were also investigated. Fragments with Mr of 55 000, 24 000, and 19 000 were the major bands precipitated by CCFAS at pH 7.0 and 8.0. Fragments with Mr of 85 000 and 75 000 bound to CCFAS at pH 5.0. Binding of CCFAS (7 μg) with fibrinogen could be inhibited by 1.2 μg of Bβ chain and 1.5 μg γ chain at alkaline pH or 6.2 μg of the Aα chain at pH 5.0. CCFAS was, therefore, assumed to be specifically bonded with HF molecules, in the alkaline range at least, resulting in compact colony forming activity in serum soft agar and paracoagulation. Key words: cell surface, polysaccharide, Staphylococcus aureus, fibrinogen.

A new genus, Rotiferophthora, to accommodate the Diheterospora-like endoparasites of rotifers

1991 ◽  
Vol 69 (3) ◽  
pp. 494-502 ◽  
Author(s):  
G. L. Barron
Keyword(s):  
New Species ◽  
Key Words ◽  
New Genus ◽  
Hydrophobic Membrane ◽  
Bdelloid Rotifers ◽  
Oil Droplet

The species of Diheterospora attacking bdelloid rotifers have been compared with Diheterospora chlamydosporia and found to be different in a number of important characteristics. These include the consistent presence of aphanophialides, proliferation of phialides and aphanophialides to form polyphialides, containment of the conidial mass in a hydrophobic membrane, reduction or elimination of the verticillate arrangement of the conidiogenous cells, and presence of a large oil droplet in each conidium. It is considered that these differences are sufficient to separate the rotifer parasites from both Diheterospora and Verticillium. Accordingly, a new genus, Rotiferophthora, is erected to accommodate the 17 species recognized in this group of fungi. Thirteen rotifer parasites previously described under Diheterospora, Verticillium, or Acrostalagmus are transferred to Rotiferophthora, and four new species of Rotiferophthora are described. Key words: Diheterospora, Rotiferophthora, endoparasite, rotifer.

Furanocoumarins on the surface of callus cultures from species of the Rutaceae and Umbelliferae

1993 ◽  
Vol 71 (7) ◽  
pp. 966-969 ◽  
Author(s):  
Alicja M. Zobel ◽  
Stewart A. Brown
Keyword(s):  
Cell Surface ◽  
Key Words ◽  
Daucus Carota ◽  
Callus Cultures ◽  
Ruta Graveolens ◽  
Pastinaca Sativa ◽  
Fresh Weight ◽  
Callus Cell ◽  
The Individual ◽  
Total Concentrations

Four linear furanocoumarins (psoralen, xanthotoxin, isopimpinellin, and bergapten) were identified on the surfaces of callus cells of Ruta graveolens, Ruta pinnata, Daucus carota, and Pastinaca sativa in the concentration range of 0.055 – 1.1 μg total/g fresh weight. In some cases these surface deposits amounted to a substantial percentage of the total, with the highest (67%) in Daucus, but they were not always proportional to the total concentrations in the cells. Variation in the ratios of concentrations of the individual coumarins indicated selective extrusion. An unresolved mixture of isopimpinellin and bergapten, with the former predominating in the proportion of ca. 7:1, was extruded in the highest concentrations on brown callus. Shake cultures produced up to two orders of magnitude more furanocoumarins than callus cells and extrusion was accelerated, but the concentrations of particular exported furanocoumarins varied, again pointing to selective extrusion. Key words: callus, cell surface, furanocoumarins, Ruta, Daucus, Pastinaca.

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
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