Free amino acid pools ofTrichoderma aureovirideduring conditions of glucose-limited growth and glucose starvation

✍ Scribed by David E. Pitt; Alan T. Bull

• Book ID: 104762858
• Publisher: Springer
• Year: 1981
• Tongue: English
• Weight: 497 KB
• Volume: 130
• Category: Article
• ISSN: 0302-8933
• DOI: 10.1007/bf00411074

✦ Synopsis

Glucose-limited and glucose-starved cultures of Trichoderma aureoviride were analyzed for the size and composition of the mycelial free amino acid pool. In glucoselimited mycelia the pool size increased as a function of the specific growth rate above a value of ca. 0.08 h-1 and this was due principally to increasing concentrations of alanine and glutamic acid. During glucose starvation, the net pool size decreased only by ca 20 %, although a transient elevation of free amino acids was observed, the latter being attributed to the turnover of mycelial proteins. The amino acid pool compositions were categorized according to their ionic nature and, although no particular group varied significantly in its percentage contribution to the total pool size of growing mycelia, the observed variations during starvation were mostly attributable to the basic and acidic amino acids. Comparisons are made of the results with those obtained for other species of filamentous fungi and some possible explanations for the observed variations are discussed.