Yeast in Mangrove Forest Soil from the Central Thailand and Its Ability in the Degradation of Starch, Carboxymethylcellulose and Xylan

Authors

  • Rungluk Kaewwichian
  • Srisukhon Khamthaiklang

Abstract

This research aims to isolate yeasts from mangrove forest soil in central region of Thailand, Bangkok, Samut Prakan, Samut Songkhram and Samut Sakorn, by using enrichment technique. A total number of 124 yeast isolates were obtained from fifty soil samples. Degradation of starch, carboxymethyl cellulose and xylan of all isolates were determined. An isolate, Trichosporon asahii (isolate TA 2.4), was able to hydrolyze all of             the three organic compounds, whereas, Candida thaimueangensis (isolate TA 2.2) and 13 isolates of Candida tropicalis were able to hydrolyze carboxymethyl cellulose and xylan. In addition, we also found that 15 isolates of Candida tropicalis and Pichia kudriavzevii (isolate PJ 4.1) could hydrolyze only carboxymethyl cellulose. Four strains of Candida tropicalis (isolate BT 1.4, KM 6.1, SS 1.2 and TA 1.2) and Galactomyces candidum (isolate PJ 1.5) hydrolyzed only xylan. Candida tropicalis (isolate SS 13.3 and SS 14.2) particularly hydrolyzed starch. Keywords : yeast, mangrove forest, starch, carboxymethylcellulose, xylan 

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2017-08-08

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บทความวิจัยจากการประชุมวิชาการระดับชาติ"วิทยาศาสตร์วิจัย"ครั้งที่ 9