Metabolic products of microorganisms |
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Authors: | G Winkelmann |
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Institution: | 1. Departmento de Microbiología, Consejo Superior de Investigaciones Científicas y Facultad de Ciencias, Universidad de Salamanca, Salamanca
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Abstract: | - The total nitrogen content of spores of Penicillium notatum increased during swelling and reached a maximum before germ-tubes were formed. It subsequently decreased during germ-tube formation until a constant value in hyphae was reached.
- An increase in the protein content of the spores was found during swelling, followed by a decrease when germ-tubes were formed. After germination, the protein content increased again to a constant level in hyphae.
- The content of total lipids steadily decreased during swelling of spores. It reached a minimum value in germinating spores, followed by a net accumulation during hyphal growth. Similar changes occurred in free lipids, phospholipids and the acetone-soluble lipids but not in bound lipids.
- After an initial decrease during swelling, no further change took place in the neutral carbohydrates content of the spores at the time of germ-tube formation. An accumulation of neutral carbohydrates occurred during late hyphal extension.
- The nucleic acid content increased sharply during swelling, and reached the highest value in swollen spores just prior to the initiation of germ-tube formation. Afterwards, its content steadily decreased during germ-tube formation and hyphae elongation.
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