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An Antimony-resistant Bacteria nxh1 and Its Application

A technology of bacteria and bacilli, applied in the field of environmental biology, can solve the problems of polluting farmland in mining areas, affecting the growth of crops, reducing the quality of crops, etc., and achieve the effects of promoting vegetation growth, mitigating the toxicity of plants to heavy metals, and broad application potential

Active Publication Date: 2019-09-17
北京优生基生态科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, the mining and smelting activities of antimony mines will also cause heavy metal elements associated with antimony, such as arsenic and mercury, to enter the supergene environment of the mining area, pollute the farmland in the mining area, not only affect the growth of crops, but also reduce the quality of crops

Method used

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  • An Antimony-resistant Bacteria nxh1 and Its Application
  • An Antimony-resistant Bacteria nxh1 and Its Application
  • An Antimony-resistant Bacteria nxh1 and Its Application

Examples

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Effect test

Embodiment 1

[0015] Example 1 Isolation and screening of antimony-resistant bacteria and anti-Sb ability

[0016] Collect plant rhizosphere soil samples near the smeltery in Xikuangshan Antimony Mining Area, Lengshuijiang City, Hunan Province, weigh 100g of the above-mentioned fresh soil samples, add an appropriate amount of antimony potassium tartrate ([C 8 h 4 K 2 o 12 Sb 2 3(H 2 O)]), so that the final concentration of antimony in the soil sample was 1000mg / kg, and placed in a constant temperature incubator at 28°C for enrichment and cultivation for one week. Take 10g of the above soil sample and place it in a sterile solution containing 10 glass beads and 90mL of 0.85% NaCl, shake it in a shaker at 30°C and 180rmin-1 for 30min to fully disperse the sample. Take 0.1mL and spread it on the CDM medium (CDM medium formula: MgSO 4 ·7H 2 O 2.0 g, NH 4 Cl 1.0 g, Na 2 SO 4 1.0 g, K 2 HPO 4 0.013 g, CaCl 2 2H 2 O 0.067 g, Na-lactate 5.0 g, agar 15.0 g, add distilled water to 100...

Embodiment 2

[0019] The identification of embodiment 2 NXH1 bacterial strain

[0020]The strain was subjected to morphological, culture characteristics and sequence analysis of 16S rDNA. The 16S rDNA molecular identification was carried out according to the following steps: pick a single colony of the screened strain and inoculate it in liquid LB medium, culture it on a shaking table at 30°C and 150r / min, take out the culture medium at 24h, and centrifuge at 5000r / min for 1min to get the supernatant According to the bacterial genomic DNA extraction kit (provided by Tiangen Biochemical Technology Co., Ltd.), the colony DNA was extracted; the general primers 27F and 1492R were used for PCR amplification of the extracted bacterial DNA; the sequence of 27F was 5′-AGA GTT TGA TCC TGG CTC AG -3'; 1492R sequence is 5'-AAG GAG GTG ATC CAG CCG CA-3' primers were synthesized by Beijing Ruibo Xingke Biotechnology Co., Ltd.; the PCR products were sequenced, and the sequencing results were analyzed by ...

Embodiment 3

[0022] Example 3: Tolerance of Acinetobacter NXH1 to various heavy metals

[0023] Separately prepared with different concentrations of As 3+ 、Cd 2+ 、Cr 6+ , Hg 2 CDM solid medium for heavy metals, Cd 2+ 、Cr 6+ , Hg 2 The concentration of heavy metals started from 100mg / L, followed by 100mg / L, 200mg / L, 400mg / L, 800mg / L, 1200mg / L, 1600mg / L, and the treatment without heavy metal was used as the control. Acinetobacter ( Acinetobacter sp.) NXH1 strain was inoculated into heavy metal-free CDM medium for 24 hours of activation, and 0.1 mL was inoculated into medium containing different types and concentrations of heavy metals, and cultured at 30°C for 24 hours. See Table 1 for the results of growth in media of various types and concentrations of heavy metals. It can be seen from the table that the NXH1 strain has strong tolerance to the above heavy metals, and the As 3+ 、Cd 2+ 、Cr 6+ , Hg 2 The tolerable concentrations are 1600mg / L, 1200mg / L, 1200ml / L and 800mg / L respec...

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Abstract

The invention discloses an antimony-resistant bacterium Acinetobacter ( Acinetobacter sp), the deposit number is CGMCC No.12895. The bacterium of the present invention is highly resistant to antimony and has anti-As 3+ 、Cd 2+ 、Cr 6+ , Hg 2 and other heavy metals, as well as the characteristics of promoting plant growth, are of great significance to promoting plant growth and mitigating the toxicity of plants to heavy metals, and have broad application potential in the bioremediation of heavy metal-contaminated mining soil.

Description

technical field [0001] The invention belongs to the technical field of environmental biology, and in particular relates to an antimony-resistant bacterium NXH1 and its application. Background technique [0002] In recent years, with the continuous expansion of the scale of antimony ore mining and the discharge of waste in the antimony industry, the soil around the mining area has been seriously polluted. As environmental pollutants, antimony and antimonides have been proven to be a class of genotoxic substances and carcinogenic to humans (Huang et al., 1998; Takahashi et al., 2002; Beyersmann et al., 2008). In addition, antimony can also cause lung injury, hematuria, fibroblast death, sister chromatid exchange, circulatory system diseases, etc. (Huang et al., 1998). Antimony has been listed as a priority pollutant by the US Environmental Protection Agency and the Council of the European Community, and it is also a pollutant closely monitored by the Japanese Environmental Ag...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12N1/20B09C1/10A01N63/00A01P21/00C12R1/01
CPCA01N63/00B09C1/10C12N1/205C12R2001/01
Inventor 彭霞薇郭东矗徐鸣陈徐林曾滢帆
Owner 北京优生基生态科技有限公司
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