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Isolating Tomato Rhizobacteria Using Root Exuding Pectin
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- Author:
- No author available
- Journal Title:
- Chinese Journal of Applied & Environmental Biology
- Issue:
- 1
- DOI:
- 10.3724/SP.J.1145.2012.00147
- Key Word:
- 果胶;培养基;番茄根际细菌;微生物分离;相似性系数;平板分离;DGGE
Abstract： 采用平板稀释和PCR-DGGE相结合的方法,比较了4种培养基(果胶富营养培养基PM,只含果胶一种营养的培养基PA,添加果胶的寡营养培养基YPP以及与YPP营养成分一致但不添加果胶的寡营养培养基YPG)分离番茄根际细菌的能力.结果显示:PA培养基能够分离到42种形态的细菌；YPP培养基可以分离到最高的细菌菌落数,分离获得的种类比PA少;YPP培养基分离获得细菌的种类和菌落数量比YPG培养基要多.聚类分析也显示只有果胶一种营养的PA培养基能分离到最多种类,分离获得的菌群与自然环境中微生物群落最相似.研究结果表明添加番茄根际主要分泌物——果胶到培养基中可以提高培养基分离细菌的能力.
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