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首页> 外文会议>International Biohydrometallurgy Symposium >The Effect of Streptomyces Sp. Isolated From Acidic Cultures of Minerals on Plant Development in Environments Polluted with Mercury
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The Effect of Streptomyces Sp. Isolated From Acidic Cultures of Minerals on Plant Development in Environments Polluted with Mercury

机译：streptomyces sp的作用。用汞污染的环境中植物开发矿物质的酸性培养分离

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Three isolates of Streptomyces variabilis (AB5, F and K1A) and one isolate of Streptomyces sp. (C2) were isolated of acidic cultures from mineral ores and concentrates from mines of the Peruvian highlands. The isolates were identified molecular and phenotypically and characterized by growth at different conditions as pH tolerance, temperature, and sodium chloride and heavy metals resistance. Streptomyces sp. (C2) was able to grow until 200 ppm of mercury and S. variabilis (AB5) grows in the presence of 100 ppm of mercury. The isolates AB5 and K1A of S. variabilis were able to grow only until 50 ppm of mercury. All strains were tested by their ability to induce germination of Lactuca sativa, Medicago sativa and Phaseolus vulgaris seeds exposed to different mercury concentrations. It was shown a significative improvement in L.sativa and P. vulgaris. In L. sativa exposed to 50 ppm of mercury, all strains were able to improve germination, root length and number of leaves. Without Streptomyces addition, they only growth until 10 ppm of mercury. Streptomyces sp. isolate had better results in germination, root length and number of leaves of L. sativa. The results found in this work indicate the potential of these isolates for restoration of soils polluted with mercury.
机译：三分之二的链霉菌（Ab5，F和K1a）的分离物和链霉菌SP的一个分离物。 （C2）与矿物矿石的酸性培养物分离出酸性培养物，并从秘鲁高地的矿山浓缩。将分离物鉴定分子和表型，其特征在于不同条件下的生长，如pH耐受，温度和氯化钠和重金属抗性。 streptomyces sp。 （C2）能够生长，直至200ppm的汞和S.Variabilis（AB5）在100ppm的汞的存在下生长。 S.Variabilis的分离物AB5和K1A能够仅生长至50ppm的汞。所有菌株都通过它们诱导患有汞浓度暴露于不同汞浓度的Mediva和寻常种子的Medicago Sativa发芽的能力。它显示出L.Sativa和P.Ventgaris的重要改善。在暴露于50 ppm的汞暴露于50 ppm的L.苜蓿中，所有菌株都能够改善芽，根长度和叶子的数量。没有链霉菌，它们只会增长直到10 ppm的汞。 streptomyces sp。分离物在L.Sativa的萌芽，根部长度和叶片的萌芽中具有更好的结果。在这项工作中发现的结果表明这些分离物的潜力恢复汞污染的土壤。

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