Department of Soil Science and Microbiology, Faculty of Agriculture and Forestry, University of Warmia and Mazury in Olsztyn, 10-727 Olsztyn, Poland.
Int J Mol Sci. 2022 Dec 22;24(1):178. doi: 10.3390/ijms24010178.
Chromium is used in many settings, and hence, it can easily enter the natural environment. It exists in several oxidation states. In soil, depending on its oxidation-reduction potential, it can occur in bivalent, trivalent or hexavalent forms. Hexavalent chromium compounds are cancerogenic to humans. The aim of this study was to determine the effect of Cr(VI) on the structure of bacteria and fungi in soil, to find out how this effect is modified by humic acids and to determine the response of to this form of chromium. A pot experiment was conducted to answer the above questions. was sown in natural soil and soil polluted with Cr(VI) in an amount of 60 mg kg d.m. Both soils were treated with humic acids in the form of HumiAgra preparation. The ecophysiological and genetic diversity of bacteria and fungi was assayed in soil under maize (not sown with ). In addition, the following were determined: yield of maize, greenness index, index of tolerance to chromium, translocation index and accumulation of chromium in the plant. It has been determined that Cr(VI) significantly distorts the growth and development of , while humic acids completely neutralize its toxic effect on the plant. This element had an adverse effect on the development of bacteria of the genera , , , and and fungi of the genera . Soil contamination with Cr(VI) significantly diminished the genetic diversity and richness of bacteria and the ecophysiological diversity of fungi. The negative impact of Cr(VI) on the diversity of bacteria and fungi was mollified by and the application of humic acids.
铬被广泛应用于各种领域，因此很容易进入自然环境。它有几种氧化态。在土壤中，根据其氧化还原电位，铬可以以二价、三价或六价形式存在。六价铬化合物对人类具有致癌性。本研究的目的是确定六价铬对土壤中细菌和真菌结构的影响，了解腐殖酸如何改变这种影响，并确定对这种形式铬的响应。通过盆栽实验来回答上述问题。在自然土壤和受六价铬污染的土壤（含量为 60mgkg d.m.）中播种。两种土壤均以腐殖酸 HumiAgra 制剂的形式处理腐殖酸。在未播种玉米的土壤中检测细菌和真菌的生理生态和遗传多样性。此外，还测定了玉米的产量、绿色指数、对铬的耐受指数、转运指数和植物对铬的积累。结果表明，六价铬严重扭曲了玉米的生长发育，而腐殖酸完全中和了其对植物的毒性作用。这种元素对属 、 、 、 和属 的细菌以及属 的真菌的发育有不良影响。土壤中六价铬的污染显著降低了细菌的遗传多样性和丰富度以及真菌的生理生态多样性。腐殖酸和的应用减轻了六价铬对细菌和真菌多样性的负面影响。
