Effect of temperature
Temperature has a profound influence on the rate of all processes occurring in living organisms including fungi and it may determine the type of reproduction, the morphology of the organism and the nutrients required. For any particular organism, the minimum and maximum temperatures are the lowest and highest at which growth occurs, and the optimum is that at which the growth rate is the greatest.Majority of fungi are mesophylls and grow at moderate temperature.These values are called cardinal values.
Temperature range of different enzymes are specific and it varies with different organisms.Enzymes are very sensitive to temperature variations and denatures at the higher temperature.Organisms show higher temperature range …show more content…
niger produces xylanase enzyme when cultured at different temperatures and maximum enzyme production was observed at 30 C. Aspergillus niger grew well at 28oC (8.98U/ml) when cultivated in Czapex dox media, but xylanase production was significantly decreased at higher temperature (Haltrich et al.,1996). The net temperature is influenced not only by the environmental temperature, but also by the increase in temperature generated from the metabolic activities of the fungi growing on the solid substrates. It might be due to that at high or low temperature than optimum, the growth of the fungus was inhibited and hence the xylanase production was decreased (Yaun and Rugyu.,1999) Incubation temperature for enzyme substrate reaction plays a critical role in enzyme productivity (Seyis and …show more content…
Fungi can grow on a wide range of pH of medium. pH of the media exerts profound influence upon the availability of certain metallic ions,like Mg,Fe,Ca and Zn which are available to the fungus at low pH,but become insoluble at higher pH. pH of the substrate also affects the permeability of the cell membrane and the enzyme activities.At acidic pH,the cell membrane becomes saturated with H+ ions,which limit the passage of essential anions,thus affecting growth of
Temperature has a profound influence on the rate of all processes occurring in living organisms including fungi and it may determine the type of reproduction, the morphology of the organism and the nutrients required. For any particular organism, the minimum and maximum temperatures are the lowest and highest at which growth occurs, and the optimum is that at which the growth rate is the greatest.Majority of fungi are mesophylls and grow at moderate temperature.These values are called cardinal values.
Temperature range of different enzymes are specific and it varies with different organisms.Enzymes are very sensitive to temperature variations and denatures at the higher temperature.Organisms show higher temperature range …show more content…
niger produces xylanase enzyme when cultured at different temperatures and maximum enzyme production was observed at 30 C. Aspergillus niger grew well at 28oC (8.98U/ml) when cultivated in Czapex dox media, but xylanase production was significantly decreased at higher temperature (Haltrich et al.,1996). The net temperature is influenced not only by the environmental temperature, but also by the increase in temperature generated from the metabolic activities of the fungi growing on the solid substrates. It might be due to that at high or low temperature than optimum, the growth of the fungus was inhibited and hence the xylanase production was decreased (Yaun and Rugyu.,1999) Incubation temperature for enzyme substrate reaction plays a critical role in enzyme productivity (Seyis and …show more content…
Fungi can grow on a wide range of pH of medium. pH of the media exerts profound influence upon the availability of certain metallic ions,like Mg,Fe,Ca and Zn which are available to the fungus at low pH,but become insoluble at higher pH. pH of the substrate also affects the permeability of the cell membrane and the enzyme activities.At acidic pH,the cell membrane becomes saturated with H+ ions,which limit the passage of essential anions,thus affecting growth of