Achromobacter CZ207 strain capable of resisting heavy metal and promoting plant growth and application thereof

Abstract

The invention provides an achromobacter sp CZ207 strain capable of resisting heavy metal such as cadmium, copper, lead, nickel and manganese and promoting the plant growth. The achromobacter sp CZ207 strain is preserved in CCTCC (China Center for Type Culture Collection) on March 7, 2016, the address is Wuhan University, Wuchang District, Wuhan City, Hubei Province, and the preservation number is CCTCC NO: M2016091; a 16S rDNA (Ribosomal Deoxyribose Nucleic Acid) sequence of the achromobacter sp CZ207 strain is as shown in an SEQ ID NO.1. Through observation on an LB solid culture medium, bacterial colonies are light yellow, tidy and moist, and the center parts of the bacterial colonies bulge; through microscopy observation, the bacterial colonies are in gram-negative, are rod-shaped and have no spores. The achromobacter sp CZ207 strain provided by the invention can tolerate multiple heavy metals, can secrete nutrient elements such as plant growth hormone, dissolved inorganic phosphorus and solid nitrogen and has the function of promoting the plant growth.

Description

Technical field [0001] The invention relates to a new strain of Achromobacter, which can tolerate multiple heavy metals such as chromium and cadmium, and particularly relates to the plant growth-promoting effect of the strain and the bioremediation of heavy metal polluted environments. Background technique [0002] With the development of the economy, the demand for heavy metals in all walks of life is increasing. Wastes from industrial metallurgy and electroplating, municipal sewage containing heavy metals, agricultural fertilizers, and pesticides have all become the main channels for heavy metals to enter the environment. Heavy metal pollution not only reduces soil fertility, inhibits the growth and reproduction of soil microorganisms, and affects the yield and quality of crops, but also affects animal and human health through the food chain. Traditional heavy metal remediation mainly uses physical and chemical methods, such as precipitation, ion exchange, adsorption, chemical...

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Problems solved by technology

Compared with traditional heavy metal remediation such as physical chemistry, phytoremediation has the advantages of simple operation, good treatment effect, no secondary pollution, low remediation cost, and large-scale promotion and application. It has good social and ecological comprehensive benefits, but phytoremediation The method also has bottleneck problems such as slow growth rate, small amount of restoration, easy to be limited by natural and artificial factors, and relatively simple absorption of heavy metals.

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