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Appl Environ Microbiol. 1993 December; 59(12): 4115-4120
Copyright © 1993, American Society for Microbiology. All Rights Reserved.

Effect of Manganese on Lignin Degradation by Pleurotus ostreatus during Solid-State Fermentation

Zohar Kerem and Yitzhak Hadar*

Department of Plant Pathology and Microbiology, Faculty of Agriculture, The Hebrew University, Rehovot 76100, Israel

ABSTRACT

Lignin degradation by Pleurotus ostreatus was studied under solid-state fermentation (SSF) in chemically defined medium containing various levels of Mn. Degradation of [14C]lignin prepared from cotton branches to soluble products, as well as its mineralization to 14CO2, was enhanced by the addition of Mn. The effect of malonate on lignin mineralization was most marked during the first 10 days of SSF, in a treatment amended with 73 µM Mn. A high concentration of Mn (4.5 mM) caused inhibition of both fungal growth and mineralization rates during the first 2 weeks of incubation. Addition of malonate reversed this effect because of chelation of Mn. Mn was found to precipitate in all treatments, with or without the addition of malonate. {alpha}-Keto-{gamma}-methiolbutyric acid cleavage to ethylene, an indication of . OH production, was observed as early as 3 days of incubation in all treatments.

FOOTNOTES

* Corresponding author.

Appl Environ Microbiol. 1993 December; 59(12): 4115-4120
Copyright © 1993, American Society for Microbiology. All Rights Reserved.



This article has been cited by other articles:

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  • Cohen, R., Yarden, O., Hadar, Y. (2002). Lignocellulose Affects Mn2+ Regulation of Peroxidase Transcript Levels in Solid-State Cultures of Pleurotus ostreatus. Appl. Environ. Microbiol. 68: 3156-3158 [Abstract] [Full Text]  
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