Suitable conditions for xylanases activities from Bacillus sp. GA2(1) and Bacillus sp. GA1(6) and their properties for agricultural residues hydrolysis

Sudathip Chantorn; Chanitchote Piyapittayanun; Phataraporn Khumphai; Srisuda Pannanusorn; Kulwadee Phannachet; Jirawan Apiraksakorn

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Suitable conditions for xylanases activities from Bacillus sp. GA2(1) and Bacillus sp. GA1(6) and their properties for agricultural residues hydrolysis

机译：芽孢杆菌属的木聚糖酶活性的合适条件。 GA2（1）和芽孢杆菌GA1（6）及其农残水解的性质

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Bacillus sp. GA2(1) and Bacillus sp. GA1(6) were isolated from soybean field in Khon Kaen province, Thailand. Crude enzymes from both isolates showed the activities of cellulase, xylanase, and mannanase at 37°C for 24 h. The highest xylanase activities of Bacillus sp. GA2(1) and Bacillus sp. GA1(6) were 1.58±0.25 and 0.82±0.16 U/ml, respectively. The relative xylanase activities from both strains were more than 60% at pH 5.0 to 8.0. The optimum temperature of xylanases was 50°C in both strains. The residual xylanase activities from both strains were more than 70% at 60°C for 60 min. Five agricultural wastes (AWs), namely coffee residue, soybean meal, potato peel, sugarcane bagasse, and corn cobs, were used as substrates for hydrolysis properties. The highest reducing sugar content of 101±1.32 μg/ml was obtained from soybean meal hydrolysate produced by Bacillus sp. GA2(1) xylanase.

机译：芽孢杆菌GA2（1）和芽孢杆菌GA1（6）是从泰国孔敬府的大豆田中分离出来的。两种分离物的粗制酶在37°C加热24小时均显示纤维素酶，木聚糖酶和甘露聚糖酶的活性。芽孢杆菌的最高木聚糖酶活性。 GA2（1）和芽孢杆菌GA1（6）分别为1.58±0.25和0.82±0.16 U / ml。来自两个菌株的相对木聚糖酶活性在pH 5.0至8.0下均大于60％。在两种菌株中，木聚糖酶的最佳温度均为50℃。在60℃下60分钟，两种菌株的残余木聚糖酶活性均超过70％。五种农业废弃物（AW），即咖啡渣，豆粕，土豆皮，甘蔗渣和玉米芯，被用作水解特性的基质。从芽孢杆菌属（Bacillus sp。）生产的豆粕水解产物获得最高还原糖含量为101±1.32μg/ ml。 GA2（1）木聚糖酶。

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《Sonklanakarin Journal of Science and Technology》 |2016年第2期|共6页
作者
Sudathip Chantorn; Chanitchote Piyapittayanun; Phataraporn Khumphai; Srisuda Pannanusorn; Kulwadee Phannachet; Jirawan Apiraksakorn;
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Suitable conditions for xylanases activities from Bacillus sp. GA2(1) and Bacillus sp. GA1(6) and their properties for agricultural residues hydrolysis

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