Influence of Temperature on the Autolytic Phase of Growth of Aspergillus niger |
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Authors: | LAHOZ, R. BALLESTEROS, ANA MARIA JIMENO, LUIS |
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Affiliation: | Instituto Jaime Ferran de Microbiologia del Consejo Superior de Investigaciones dentlficas, Joaquin Costa, 32, Madrid-6, Spain Institute de Edafologia y Biologia Vegetal del Consejo Superior de Imestigaciones Cientlficas Serrano, 115, Madrid-6, Spain |
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Abstract: | The variation in the extent to which autolysis of Aspergillusniger van Tieghem occurs in response to alteration of temperatureand of the length of the period of autolysis has been studied.The degree of autolysis at 10, 15, 20, 25, 30 and 35 °Cwas 158, 239, 352, 408, 491and 562 per cent, respectively. Autolysis increased sharplywith the length of the period of autolysis reaching a plateautowards the second day at the lowest temperatures (020°C) and towards the fourth day at the higher temperatures.Theextent of the increase of autolysis plotted against temperatureindicates a linear relationship between these two parameters.The release of protein from autolysing mycelium of A. nigeris greatly affected by temperature, amounting to 19 percent at 10 °C, whereas at 30 °C it reached 51per cent. On the other hand, gradual increase of temperatureduring autolysis seems not to alter the content of mycelialcarbohydrates of A. niger. |
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