Abstract
Microorganism DNA of rhizosphere soil from Pinus koraiensis and Pinus sylvestriformis were extracted by proteinase K based on SDS method, CTAB method, PVP (polyvinylpolypyrrolidone) method, and freezing and thawing method and the crude DNA from rhizosphere soil were purified by dialysis method, silver beads absorption method, and squeezing DNA gel method. The results of different extracting and purifying methods were compared and evaluated. Results indicated that the best method of extraction for microorganism DNA in rhizosphere soil was proteinse K based on SDS method with high salt concentration of 1.0% (w/v) NaCl, which could effectively eliminate humic acids and other impurities. The dialysis method was suitable to purify DNA from rhizosphere soil because of effectively removing brown matters and humic acids and the purified products were suited to PCR amplification. Squeezing DNA gel method was also a good purification method with the advantage of inexpensive in cost and efficient in use.
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Foundation item: This project was supported by the Knowledge Innovation Project from Chinese Academy (KZCX1-SW-01) and the National Natural Science Foundation of China (30070158).
Biography: JIA Xia (1975–), female, Ph. D. work in Environmental Science and Engineering College, Chang’an University, Xi’an 710054, P. R. China.
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Jia, X., Han, Sj., Zhao, Yh. et al. Comparisons of extraction and purification methods of soil microorganism DNA from rhizosphere soil. J. of For. Res. 17, 31–34 (2006). https://doi.org/10.1007/s11676-006-0007-3
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DOI: https://doi.org/10.1007/s11676-006-0007-3