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论文类型：期刊论文

发表时间：2015-08-01

发表刊物：JOURNAL OF APPLIED MICROBIOLOGY

收录刊物：SCIE、PubMed、Scopus

卷号：119

期号：2

页面范围：425-434

ISSN号：1364-5072

关键字：compost; degradation; DGGE; keratin; protein; sequencing

摘要：AimsCompost activities efficiently break down a wide range of organic substances over time. In this study, bovine hoof was used as recalcitrant protein model to gain so far cryptic information on biodegradation during livestock mortalities composting.
   Methods and ResultsBovine hooves (black and white), containing different amounts of melanin, placed into nylon bags were monitored during composting of cattle mortalities for up to 230days. Besides physiochemical analysis, bacterial 16S and fungal 18S DNA fragments were amplified by PCR and profiles were separated by DGGE. Sequence analysis of separated fragments revealed various bacterial and fungal identities during composting. The microbial diversity was affected by a time-temperature interaction and by the hoof colour. Our molecular data, supported by electron microscopy, suggest hoof colonization by shifting bacteria and fungi communities.
   ConclusionDuring composting, microbial communities work collaboratively in the degradation of recalcitrant organic matter such as keratin over time.
   Significance and Impact of the studyA number of biomolecules including recalcitrant proteins may persist in environmental reservoirs, but breakdown can occur during composting. A combination of bioactivity and physiochemical conditions appear to be decisive for the fate of persistent biomolecules.