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Potential of Pleurotus ostreatus to remediate diesel-contaminated soil in subarctic mesocosms

机译：平菇平菇修复介壳膜下柴油污染土壤的潜力

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摘要

Pleurotus ostreatus, a gilled basidiomycete, has previously been shown to biodegrade petroleum using extracellular enzymes. However, few studies have tested petroleum biodegradation by fungi, known as mycoremediation, in cold temperatures. I conducted mesocosm studies to assess the potential for mycoremediation of diesel-contaminated soil collected from interior Alaska with a cultivated strain of P. ostreatus var. columbinus at 4 ºC, 10 ºC, and 25 ºC. In soil, both uninoculated and inoculated with P. columbinus, diesel range organics (DRO) decreased by 22-28% (p=0.455), 41-55% (p=0.236), and 91-92% (p=0.735) at the three temperatures, respectively. The differences in DRO loss between uninoculated and inoculated mesocosms at each temperature were not statistically significant, most likely due to high soil heterogeneity. However, DRO loss was greater as temperature increased, and was significantly different between the temperatures evaluated. These results indicate that temperature is a more important factor controlling DRO loss than substrate or inoculation with P. columbinus. Inoculation may enhance DRO loss at medium temperatures, but inoculation does not appear to enhance DRO loss at the highest and lowest temperatures in this study. The results also suggest that manipulating the temperature of remediation sites may be more important than inoculating with Pleurotus, and that inoculation might not be needed at sites where temperature can be increased.
机译：平菇，一种镀金的担子菌，以前已被证明可以利用细胞外酶生物降解石油。但是，很少有研究测试在低温下被真菌（称为mycoremediation）降解的石油生物降解作用。我进行了介观研究，以评估从阿拉斯加内部收集到的栽培菌株P. ostreatus var对柴油污染的土壤进行mycoremediation的潜力。哥伦比纳在4ºC，10ºC和25ºC的温度下。在未接种和接种哥伦布对虾的土壤中，柴油范围有机物（DRO）降低了22-28％（p = 0.455），41-55％（p = 0.236）和91-92％（p = 0.735）分别在三个温度下在每种温度下，未接种和已接种的中观膜之间的DRO损失差异均无统计学意义，这很可能是由于土壤异质性较高所致。但是，DRO损耗随温度升高而增大，并且在所评估的温度之间存在显着差异。这些结果表明，温度是控制DRO损失的重要因素，它比底物或接种哥伦比亚疫霉菌更为重要。在本研究中，接种可能会增加DRO在中等温度下的损失，但接种似乎并未在最高和最低温度下增加DRO的损失。结果还表明，操纵修复部位的温度可能比接种侧耳更重要，并且在温度可以升高的部位可能不需要接种。

著录项

  • 作者

    Anderson, Christin Elizabeth.;

  • 作者单位

    University of Alaska Fairbanks.;

  • 授予单位 University of Alaska Fairbanks.;
  • 学科 Natural resource management.;Environmental engineering.
  • 学位 M.S.
  • 年度 2016
  • 页码 64 p.
  • 总页数 64
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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