Publications by authors named "Sassen M"

43 Publications

Cell wall formation in zoospores of Allomyces arbuscula. III. Carbohydrate composition of cell walls during development from meiospores to hyphae.

Arch Microbiol 1977 May;113(1-2):73-8

Carbohydrate composition was determined in isolated cell walls of meiospores of Allomyces arbuscula after incubation for 15 min (encysted meiospores: cysts), 150 min (germlings: cysts + rhizoids) and 24 h (cysts + rhizoids + hyphae). The principal constituent in all cell wall samples is chitin, accounting for about 75% of the recovered carbohydrates. In addition, cell walls of all stages examined contain polysaccharides which release galactose, glucose, mannose, arabinose, xylose, fucose, and rhamnose on acid hydrolysis. While different developmental stages show minor quantitative changes in chitin, the ratio of galactose to glucose decreases sharply during differentiation of ungerminated cysts into germlings with rhizoids and hyphae. The increase in glucose is accompanied by a decrease in the amount of xylose and/or fucose and of galactose.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1007/BF00428583DOI Listing
May 1977

β-Glucan synthetase activity in Golgi vesicles ofPetunia hybrida.

Planta 1977 Jan;133(3):303-8

Department of Botany, University of Nijmegen, Toernooiveld, Nijmegen, The Netherlands.

β-Glucan synthetase activity has been demonstrated in a Golgi vesicle fraction isolated from pollen tubes ofPetunia hybrida. Thisβ-glucan synthetase activity differs from that of most other higher plants in its inability to incorporate [(14)C]glucose from GDP-[(14)C]glucose. UDP-[(14)C]glucose, however, is an appropriate glucose donor for this enzyme. The optimum conditions for thisβ-glucan synthetase activity are: 1 mg Golgi vesicle protein/ml reaction mixture; pH=±8 and a temperature of 25°C. The newly synthesized alkali-insoluble glucan containsβ-1,3- as well as β-1,4-glucosidic linkages.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1007/BF00380693DOI Listing
January 1977

Cell wall formation in zoospores of Allomyces arbuscula. II. Development of surface structure of encysted haploid zoospores, rhizoids, and hyphae.

Arch Microbiol 1976 Aug;109(1-2):37-43

Development of haploid meiospores of Allomyces arbuscula into germling cells with rhizoids and hyphae was followed during incubation in complete growth medium. The surface structure of encysted meiospores, rhizoids and hyphae before and after extraction of amorphous materials with ethanolic KOH was studied by means of carbon-platinum replicas. After 2--3 min incubation in complete medium 10% of the meiospores were surrounded by a cell wall containing microfibrils embedded in a matrix. Structure of cell walls of encysted meiospores, rhizoids, and hyphae differ from one another by the location of amorphous materials and by the arrangement of chitin microfibrils.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1007/BF00425110DOI Listing
August 1976

Temperature dependence of the cutaneous mechanoreceptor response.

Pflugers Arch 1972 ;332:Suppl 332:R103

View Article and Find Full Text PDF

Download full-text PDF

Source
October 1972

Surface characteristics of Penicillum conidia.

Mycologia 1968 Mar-Apr;60(2):290-303

View Article and Find Full Text PDF

Download full-text PDF

Source
July 1968

Surface structures of frozen-etched Penicillium conidiospores.

Naturwissenschaften 1966 Dec;53(24):708

View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1007/BF00602737DOI Listing
December 1966