title: Germination and outgrowth of Schizosaccharomyces pombe spores isolated by a simple batch centrifugation technique.
abstract: Spores of the fission yeast Schizosaccharomyces pombe have been separated from vegetative cells by a simple and rapid centrifugation (800 g for 20 min) through a 35% Hypaque solution to a purity greater than 95%. Approximately 35% of the spores were recovered. Regrowth in EMM2 plus glucose showed that over 97% of the spores germinated within the first 2 h and outgrowth continued between 5 and 10 h. Sucrose induced germination in greater than 95% of the spores with a 1 h delay and outgrowth in 50% of the spores with a 3 h delay. There was little protein synthesis during germination but the protein content increased linearly coincident with outgrowth. The RNA content increased slightly during germination, but increased linearly 1 h before the onset of outgrowth and protein synthesis. After 8 h of regrowth, coincident with the onset of DNA synthesis, the rate of RNA synthesis was accelerated. The DNA content had increased 1.7-fold after 10 h of regrowth from a haploid level of 1.36 x 10(-8) microgram spore-1.
mesh_terms: D001203:Ascomycota / Q000502:physiology*; D002498:Centrifugation; D004271:DNA, Fungal / Q000096:biosynthesis; D005656:Fungal Proteins / Q000096:biosynthesis; D012331:RNA, Fungal / Q000096:biosynthesis; D012568:Schizosaccharomyces / Q000502:physiology*; D013172:Spores, Fungal / Q000302:isolation & purification / Q000502:physiology
chemical_list: D004271:DNA, Fungal; D005656:Fungal Proteins; D012331:RNA, Fungal