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Endophyte for promoting growth of plants and remediation of heavy metal-contaminated soil and application

A technology that promotes plant growth and pollutes soil. It is applied in the field of phytoremediation of heavy metal soil pollution efficiency to achieve the effects of improving pollution efficiency, avoiding competition, and simple operation.

Inactive Publication Date: 2011-08-24
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, to the best of our knowledge, there are no patents or literature reports on heavy metal-resistant growth-promoting endophytes isolated from hyperaccumulative plants, and applied to promote the growth and phytoremediation of energy crops on heavy metal-contaminated marginal lands.

Method used

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  • Endophyte for promoting growth of plants and remediation of heavy metal-contaminated soil and application
  • Endophyte for promoting growth of plants and remediation of heavy metal-contaminated soil and application
  • Endophyte for promoting growth of plants and remediation of heavy metal-contaminated soil and application

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Embodiment Construction

[0020] The following examples are intended to further illustrate the present invention, rather than limit the present invention.

[0021] The endophyte SLS18 was soaked in sweet sorghum, pokeweed (P.acinosa R.) and black nightshade (S. nigrum L.) seeds at the same time, and then sowed and grown separately with the seeds of the three plants that were not infected with endophytes. Comparison of test effects, in which Pokeweed and Solanum nigrum are two newly discovered heavy metal superaccumulative plants; the test operation process is according to figure 1 conduct.

[0022] All experiments were carried out in parallel for 3 times, and the endophyte SLS18 significantly increased the biomass of sweet sorghum. figure 2 , image 3 , Figure 4 .

[0023] The growth-promoting rate of endophyte SLS18 on sweet sorghum, pokeweed and black nightshade is shown in Table 1, and the concentration of heavy metals in the soil is 0 mg kg -1 , Mn 2000mg kg -1 , Cd 50mg kg -1

[0024] Ta...

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Abstract

The invention provides an endophyte for promoting the growth of plants and the remediation of heavy metal-contaminated soil and application thereof. Bacterial liquid of endophyte SLS18 is utilized to dip-dye Sorghum bicolor L. in a mode of seed bacteria dipping to colonize the endophyte SLS18 into the Sorghum bicolor L. to accompany each stage of the growth of the Sorghum bicolor L., so that the growth of the Sorghum bicolor L. on heavy metal-contaminated marginal land and the remediation of soil are promoted. The endophyte SLS18 is separated from the stem of a hyperaccumulator, namely pokeberry root, is obtained through screening, and is an endophyte which can be successfully colonized in the Sorghum bicolor L., has a remarkable effect of promoting the growth of the Sorghum bicolor L. and has the heavy metal resistance. A method is easy to operate, and is safe and economic, no new pollution is introduced into soil environment, heavy metal-contaminated marginal land resources can be effectively utilized so as to avoid the rival of energy crops and food crops against finite cultivated land, and heavy metal-contaminated land can also be effectively remediated.

Description

technical field [0001] The invention belongs to the field of remediation of heavy metal soil pollution, and in particular relates to an endophytic bacterium capable of promoting the growth of energy crops, and an application method for infecting plants and improving the efficiency of phytoremediation of heavy metal soil pollution. Background technique [0002] With the development of modern industry, heavy metal pollution poses a serious threat to human health and ecosystems, and has gradually become one of the global environmental problems. Among them, manganese can accumulate in the human body and cause manganese poisoning, such as Parkinson's disease, reproductive system and immune system lesions. Another heavy metal, cadmium, has carcinogenic, teratogenic, and mutagenic effects, and its accumulation in the human body can cause bone, digestive tract, and vascular lesions. As we all know, the application of phytoremediation technology to remove heavy metals in soil has ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12N1/20A01N63/02A01P21/00B09C1/10C12R1/07
Inventor 罗胜联徐涛英陈亮饶婵陈觉梁肖潇刘承斌
Owner HUNAN UNIV
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