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直流电场对根际土壤微生物群落的影响及其机理

Keywords: 直流电场,根际土壤微生物,PCR-DGGE分析,微生物群落多样性,微生物群落相似性

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Abstract:

电场作用下根际土壤微生物群落的变化与利用电场强化植物修复效率密切相关。利用改进的PCR-DGGE方法研究了不同电场条件下根际土壤微生物群落多样性和相似性的变化,分析了直流电场对土壤微生物群落的影响机理。结果表明,电场对根际土壤微生物群落的影响与电场条件有关,合适的电场条件有助于增加土壤微生物群落的多样性,但是电场形式、强度和施加方式不当则会使土壤微生物群落的多样性和结构受到明显影响。电场作用下土壤性质的变化、电场对土壤微生物的迁移作用和致死效应,以及微生物对环境压力的生理响应等是电场影响土壤微生物群落的主要机制。为了避免电场对根际土壤微生物的不利影响,利用电场强化植物修复时需要采用合适的电场条件。

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