지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록· 키워드
오류제보하기
Termite guts are extreme environment harboring diverse microorganisms with ability to degrade a wide range of plant polysaccharides. Beneficial effects of the gut microorganisms are relevant to the various potential properties of individual strains, and relate to the original sources of the strains. Nonstarch polysaccharides (NSPs) are main biopolymers in seeds and grains. These antinutritional factors are found abundantly in plant-based feed and able to reduce nutrient digestibility in animals. The present study aimed to investigate termite gut bacteria capable of NSP hydrolysis and potential probiotic properties. Among 172 isolates obtained from the soil-wood interface-feeding termite Termes propinquus, seven isolates were selected based on the presence of three hydrolytic enzymes (cellulase, xylanase, and pectinase). Molecular identification showed that the different isolated strains were closely related to the species in Bacillus subtilis group including Bacillus velezensis, Bacillus amyloliquefaciens, Bacillus siamensis, and Bacillus subtilis. All strains were considered safe based on hemolytic activity and antibiotic susceptibility; six strains survived in both 0.3% bile salts and pH 2.5 conditions for 3 h; four strains inhibited 12 strains of foodborne and gastrointestinal pathogenic bacteria. The strains were evaluated for NaCl and phenol tolerances, antioxidant activity, cell-surface properties including hydrophobicity, auto- and co-aggregations, and adhesion ability to intestinal epithelial cells, Caco-2 and HT-29. All Bacillus strains, except TpNSP_11, showed high survival in simulated gastrointestinal tract conditions and the NSP degradation ability was detected. According to this study, the guts of T. propinquus are indicated as a source of potential probiotic bacteria useful in feed biotechnology.
목차
Materials and Methods
Results
Discussion
References
참고문헌 (37)
참고문헌 신청
Bedford MR and Partridge GG. 2010. Enzymes in Farm Animal Nutrition. 2nd edn. Wallingford, Oxforshire, UK.
Bernardeau M and Vernoux JP. 2013. Overview of differences between microbial feed additives and probiotics for food regarding regulation, growth promotion effects and health properties and consequences for extrapolation of farm animal results to humans. Clin. Microbiol. Infect. 19, 321–330.
Chandran C and Keerthi T. 2018. Probiotic potency of Lactobacillus plantarum KX519413 and KX519414 isolated from honey bee gut. FEMS Microbiol. Lett. 365, fnx285.
CLSI, Clinical and Laboratory Standards Institute. 2020. Performance standards for antimicrobial susceptibility testing. 30th edn. CLSI Supplement M100. Clinical and Laboratory Standards Institute, Wayne, Pennsylvania, USA.
Cutting SM. 2011. Bacillus probiotics. Food Microbiol. 28, 214–220.
Bernardeau M and Vernoux JP. 2013. Overview of differences between microbial feed additives and probiotics for food regarding regulation, growth promotion effects and health properties and consequences for extrapolation of farm animal results to humans. Clin. Microbiol. Infect. 19, 321–330.
Chandran C and Keerthi T. 2018. Probiotic potency of Lactobacillus plantarum KX519413 and KX519414 isolated from honey bee gut. FEMS Microbiol. Lett. 365, fnx285.
CLSI, Clinical and Laboratory Standards Institute. 2020. Performance standards for antimicrobial susceptibility testing. 30th edn. CLSI Supplement M100. Clinical and Laboratory Standards Institute, Wayne, Pennsylvania, USA.
Cutting SM. 2011. Bacillus probiotics. Food Microbiol. 28, 214–220.
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