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Method for extracting microbial genome DNA from poplar wood

A technology of microbes and genomes, applied in the field of molecular biology, can solve the problems of low average concentration of DNA, unsatisfactory, pollution, etc., and achieve the effect of increasing lysis ability and degree of lysis, reducing degradation and damage, and high concentration

Active Publication Date: 2017-05-31
HUAZHONG AGRI UNIV +1
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

Using these methods to extract the genomic DNA of microorganisms in wood, the average concentration of the obtained DNA is very low, and most of them are seriously polluted, which cannot meet the requirements of 16S rDNA / ITS sequencing and metagenomics sequencing in the later stage

Method used

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  • Method for extracting microbial genome DNA from poplar wood
  • Method for extracting microbial genome DNA from poplar wood
  • Method for extracting microbial genome DNA from poplar wood

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Embodiment 1

[0031] The method provided by the present invention is used below to extract microbial genomic DNA from poplar wet heartwood and healthy sapwood samples, and each treatment is repeated 3 times.

[0032] Experimental operation:

[0033] 1. Preparation of extraction buffer and TE buffer:

[0034] Extraction buffer: 1%CTAB+2%PVPP+1.5M NaCl+100mM EDTA+100mM TE pH8.0+0.1M sodium phosphate buffer pH8.0, autoclaved.

[0035] TE buffer: 10 mM Tris-HCl and 1 mM EDTA.

[0036] 2. Extraction steps

[0037] (1) Grinding the sample with liquid nitrogen.

[0038] (2) Take 1 g of ground wet heartwood or healthy sapwood sample, add 0.6 g of activated carbon, and add 5 mL of extraction buffer (1% CTAB+2% PVPP+1.5M NaCl+100mM EDTA+100mM TE pH8.0+0.1M Sodium phosphate buffer (pH8.0), add 75 μL proteinase K (20 mg / ml), vortex mix, add 1000 μL SDS (10%), vortex mix.

[0039] (3) Place in a 60°C water bath for 2 hours, during which time mix by inverting 3 to 4 times.

[0040] (4) Centrifuge (...

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Abstract

The invention discloses a method for extracting microbial genome DNA from poplar wood. According to the method, a CTAB (cetyltrimethyl ammonium bromide) method and an SDS (sodium dodecyl sulfonate) method are combined, and technical parameters of various steps are optimized, so that the genome DNA extracted by virtue of the method has the advantages of being high in concentration and free from pollution; determined by a spectrophotometer, OD260 / OD230 and OD260 / OD280 values are close to standard values, completely satisfying requirements of 16S rDNA / ITS sequencing and metagenomics sequencing adopted in the later period; therefore, the method can be directly applied to a molecular operation.

Description

technical field [0001] The invention belongs to the technical field of molecular biology, in particular to a method for extracting microbial genome DNA from poplar wood (divided into wet heartwood and healthy sapwood) applied in molecular sequencing technology. Background technique [0002] Poplar is one of the important fast-growing timber species in my country. The seventh national forest resources inventory data show that the total area of ​​poplar forests in my country has reached 10.1026 million hm 2 , of which the artificial forest is 7.5723 million hm 2 , accounting for 18.9% of the total area of ​​artificial arbor forests in the country, and the cultivated area ranks first in the world. However, the phenomenon of wet heartwood is very serious, which has a negative impact on the processing and utilization of poplar. According to a survey in Jiayu County, Hubei Province, the rate of diseased plants in nine poplar varieties reached 100%, the discoloration diameter at...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12N15/10
CPCC12N15/1003C12Q1/6869C12Q2523/32C12Q2527/125C12Q2535/122
Inventor 杜克兵余晓莉胡兴宜荣新军仝瑞冠李立志
Owner HUAZHONG AGRI UNIV
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