Influence of aromatic compounds on biodegradation of [14C]-labeled xylan and mannan by the white-rot fungus Phlebia radiata |
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Authors: | Rogalski J Cho N S Zadora J Prendecka M Choma A Urbanik-Sypniewska T Leonowicz A |
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Institution: | (1) Department of Biochemistry, Maria Curie-Sklodowska University, MC-Sklodowska Square 3, Lublin 20-031, Poland, PL;(2) School of Forest Resources, Chungbuk National University, Cheongju 361-763, Republic of Korea, PL;(3) Department of General Microbiology, Maria Curie-Sklodowska University, MC-Sklodowska Square 3, Lublin 20-031, Poland, PL |
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Abstract: | Radiolabeled 14C]arabinoxylan from wheat meal and 14C]galactoglucomannan from red clover meal were prepared by using 14CO2 as a precursor. Twice as much mannan was mineralized than xylan after 14 days of incubation with Phlebia radiata. Low-molecular-weight phenolic compounds structurally related to lignin increased during mineralization of both hemicellulose
fractions. Veratryl alcohol increased degradation of arabinoxylan by approximately 28.5%, whereas veratric acid increased
it by only 9.0%. Vanillic acid and ferulic acid also stimulated degradation by 16.6% and 34.7%, respectively. Veratryl alcohol
and ferulic acid increased degradation of galactoglucomannan by approximately 75%. Veratraldehyde in both cases repressed
the degradation process (23.6% arabinoxylan, 43.8% galactoglucomannan). These results indicate that the degradation of hemicelluloses,
e.g., xylan and mannan, by P. radiata is enhanced by addition of aromatic compounds. Journal of Industrial Microbiology & Biotechnology (2002) 28, 168–172 DOI: 10.1038/sj/jim/7000221
Received 25 July 2001/ Accepted in revised form 23 October 2001 |
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Keywords: | : arabinoxylan galactoglucomannan biodegradation aromatic compound Phlebia radiata |
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