Physiology and Biotechnology of Aspergillus

Expresión diferencial de los genes de algunas enzimas lignocelulolíticas en biopelículas de Aspergillus niger

“…It has been stated that in fungi differential gene expression is related to pH, nutrient type and availability, thermal shock, and culture conditions (Denison 2000;Aro et al 2005;Ward et al 2006). From this point of view, higher cellulase and xylanase production attained by A. niger biofilms could be associated to differential gene expression mechanisms.…”

Macrophomina phaseolina, Cause of Stem Canker Disease in Pigeonpea: Physiological Response under Different Nitrogen Source

“…The complex growth media usually results in higher protease production (Joo et al, 2002). At the same time, the decrease in EP production in the presence of AA, AC and AN in both the isolates might be due to the catabolite repression in the presence of ammonium ions responsible for protein degradation (Ward et al, 2005). The expression of protease genes in Aspergillus niger, pepA and pepB, were repressed by the addition of ammonia or urea in the presence of glucose and BSA (Jarai and Buxton, 1994).…”

Characterization of Aspergillus Niger 65i6 lipase from solid-state fermentation using Jatropha seed cake medium

“…The differing characteristics of the Aspergillus niger 65I6 lipase is probably related to the physiology of the microorganism. According to Ward et al (2006), the activity of enzymes at certain pH values corresponds with the environmental pH. It is to be expected that gene regulation is responsible for mediating this characteristic.…”