Mechanisms of coal solubilization by the deuteromycetes Trichoderma atroviride and Fusarium oxysporum |
| |
Authors: | U Hölker S Ludwig T Scheel M Höfer |
| |
Institution: | Botanisches Institut der Universit?t Bonn, Kirschallee 1, D-53115 Bonn, Germany Tel.: +49 228-735545 Fax: +49 228-735504, DE
|
| |
Abstract: | Three different mechanisms can be envisaged that are used by fungi to solubilize coal: the production of alkaline substances,
the extrusion of chelators and, of special interest in the scope of biotechnology, the action of enzymes. Whether these mechanisms
are operating separately or in various combinations has not yet been finally assessed. The two deuteromycetes Fusarium oxysporum and Trichoderma atroviride solubilize coal by synergistic effects of various different mechanisms depending on the cell metabolism. F. oxysporum seems to solubilize coal by increasing the pH of the mycelial surroundings and by the action of chelators induced during
growth in glutamate-containing media (without involvement of enzymes). T. atroviride, on the other hand, appears to use, in addition to an alkaline pH and a high chelator activity, at least two classes of enzyme
activity to attack coal: hydrolytic activity for coal solubilization and ligninolytic activity for degradation of humic acids.
Received: 3 February 1998 / Received revision: 31 August 1998 / Accepted: 3 September 1998 |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|