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Isolation and Identification of Anaerobic Cellulolytic Bacteria in Intestine of Rhizomyidae

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  • 1. College of Animal Science and Technology of Guangxi University, Nanning 530005, China;
    2. Nanning University, Nanning 530200, China

Received date: 2015-01-05

  Online published: 2015-06-17

Abstract

In order to isolate and identify anaerobic cellulolytic bacteria in intestine of rhizomyidae, cecum content of Rnizomyssinehsis was collected and diluted. Culture mediums with different kinds of cellulose [microcrystalline cellulose (MCC) and sodium carboxymethyl cellulose (CMC-Na), respectively] were used for preliminary screening of cellulolytic bacteria under anaerobic condition, and then multiple screening using culture medium with cellobiose as the only carbon source was carried out. The screened strains were identified by the methods of morphology and molecular biology. The results showed as follows: after preliminary screening and screening, two strains of anaerobic cellulolytic bacteria were isolated. After preliminary screening on culture medium with MCC and CMC-Na, the cellulolytic enzyme activity of final screened strains was 6.599 and 5.268 U/mL, respectively. After PCR identification and sequencing, the sequence was used to construct phylogenetic tree, and high homology was found between the two strains and Clostridium butyricum, which reached 99%. The two strains belonged to Clostridium. In conclusion, two strains of anaerobic cellulolytic bacteria are successfully screened from cecum in of rhizomyidae, and are belonged to Clostridium.

Cite this article

CAO Xiaoyan, WANG Shangru, XU Wen, XU Gaoqiao, ZHANG Shengnan, WANG Shichang, LIANG Shizhong . Isolation and Identification of Anaerobic Cellulolytic Bacteria in Intestine of Rhizomyidae[J]. Chinese Journal of Animal Nutrition, 2015 , 27(6) : 1976 -1982 . DOI: 10.3969/j.issn.1006-267x.2015.06.038

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