| 摘要: |
| 对从野外土壤中分离得到的1株可降解黄原胶的兼性厌氧菌进行了鉴定。结果表明,该菌株在幼龄时期为杆菌,大小约为(0.4～0.6) μm×(1.0～2.0) μm,呈直杆形或稍弯曲杆形,但在1周以上的培养物中,只存在大小约为0.5 μm×0.5 μm的类球状细胞;该菌为革兰氏阴性,兼性厌氧,无运动性,不形成芽孢,能利用多种糖类基质。初步鉴定该菌为鞘氨醇单胞菌(Sphingomonas)。 |
| 关键词: 黄原胶降解菌 黄原胶酶 兼性厌氧 革兰氏阴性 鞘氨醇单胞菌 |
| DOI： |
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| 基金项目:国家高技术研究发展计划（863）项目（2001AA625010，2002AA245131） |
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| Identification of a strain of xanthan-degrading bacteria |
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| Abstract: |
| According to its morphology,cultural properties,physiological characteristics and 16S ribosomal RNA gene sequence,a strain of facultative anaerobe XT-11 for degrading xanthan which was screened from microorganism in the soil was analyzed.XT-11 was gram-negative,with the size of single rod cell of 0.4-0.6 μm×1.0-2.0 μm when it was young,with the size of round cell of 0.5 μm×0.5 μm after cultivating one week.It was of non-motil,non-sporeforming and could utilize many sugars.So,this strain was identified as Sphingomonas sp.. |
| Key words: xanthan-degrading bacteria xanthase facultative anaerobe gram-negative Sphingomonas |
