期刊
BIORESOURCE TECHNOLOGY
卷 331, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2021.125049
关键词
Rice straw degradation; Psychrotrophic fungus; Deoxyribonucleic acid barcoding; Aureobasidium; Composting
资金
- National Key Technology Research and Development Program of China [2017YFD0800203]
- Fundamental Research Funds for the Central Universities [KJQN202116, KJQN202117]
- National Natural Science Foundation of China [41922053, 42090062, 31972504, 42007038]
- Natural Science Foundation of Jiangsu Province [BK20190518, BK20180527, BK20200533]
- Bioinformatics Center of Nanjing Agricultural University
The study isolated a novel psychrotrophic fungus species, Aureobasidium paleasum, with high cellulolytic activities at low temperatures, which efficiently decomposed rice straws and cellulose compared to common cellulose-degrading fungi. This fungus shortened the thermophilic stage, enhanced compost maturity, and improved compost quality, highlighting its application potential for composting in colder regions.
This study aimed to isolate psychrotrophic cellulose-degrading fungi and to investigate their application potential for composting in cold climate regions in China. One out of five psychrotrophic cellulose-degrading fungal isolates was identified as a novel fungal species, Aureobasidium paleasum sp. nov., with a strong straw degradation potential. Enzyme activity assays and FITR spectroscopy revealed high cellulolytic activities of this psychrotrophic fungus at lower temperatures, with high thermal adaptability from 5 ?C to 50 ?C (optimum at 10 ?C). A. paleasum efficiently decomposed rice straws and cellulose at 10 ?C compared to the common cellulosedegrading fungus Penicillium oxalicum. In comparison to P. oxalicum, A. paleasum shortened the thermophilic stage, enhanced compost maturity and improved compost quality. Our work suggests that the psychrotrophic fungus A. paleasum is efficient for rice straw degradation and composting at low temperatures, highlighting its application potential for composting in colder regions.
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