Abstract:
:This study examines the growth, metabolism of Phanerochaete chrysosporium (P. chrysosporium) and route of lignin degradation in response to cadmium (Cd) stress in solid-state fermentation of rice straw. Less living fungi biomass was found under Cd exposure, suggesting that Cd had strong toxicity to P. chrysosporium. The maximum values of lignin peroxidase and manganese peroxidase were 0.34 and 5.21 U g(-1) at the Cd concentration of 32 mg kg(-1), respectively, lower than that in control, which indicated Cd stress would inhibit ligninolytic enzymes. The production of reactive oxygen species (ROS) including hydroxyl radicals (OH), superoxide anion radical (O2(-)) and hydrogen peroxide (H2O2) increased after Cd exposure. Higher concentration of oxalate was detected at high Cd concentrations. Cd stress also had influence on the rates of lignocelluloses degradation and the route of lignin degradation. Partial Cd could be removed by P. chrysosporium.
journal_name
Chemospherejournal_title
Chemosphereauthors
Zhao M,Zhang C,Zeng G,Huang D,Xu P,Cheng Mdoi
10.1016/j.chemosphere.2015.07.019subject
Has Abstractpub_date
2015-11-01 00:00:00pages
560-7eissn
0045-6535issn
1879-1298pii
S0045-6535(15)00739-0journal_volume
138pub_type
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