General features and structure of yeast.ppt

SHORT NOTE ON YEAST

1. General Characters and Structure of Yeast Dr. V. RAMESH Assistant Professor & Head In-Charge, Department of Botany, Vivekananda College, Tiruvedakam West – 625 234 Madurai

2. Yeasts are unicellular , eukaryotic fungi with completely different properties from those of bacteria, Yeast contains almost the same organelles of a mature eukaryotic cell. Nucleus , Golgi apparatus, mitochondria, endoplasmic reticulum, vacuole, and cytoskeleton are the most important one. Yeast cell particle size is typically of 5×10μm . The primary method of reproduction is by budding , and occasionally by fission . Yeast can be identified and characterized based on cell morphology , physiology, immunology , and using molecular biology techniques. The natural habitat of yeast may be soil, water, plants, animals, and insects with special habitat of plant tissues. Many commercial products contain a mixture of varying proportions of live and dead Saccharomyces cerevisiae cells are available for using as feed additives in animals nutrition. General Characters

3. Shape- Sperical , Ovals, Cylindricals Size – 5-10mm Cell wall – Chitin Cell Cytoplasm Nucleoplasm Outer Ectoplasm Inner Endoplasm Structure of Yeast

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