温莪术内生真菌<em>Gibberella moniliformis</em> EZG0807诱变及其诱变株遗传稳定性研究

doi:10.13523/j.cb.20140504

中国生物工程杂志

2014, Vol. 34

Issue (5): 23-29 DOI: 10.13523/j.cb.20140504

研究报告

温莪术内生真菌Gibberella moniliformis EZG0807诱变及其诱变株遗传稳定性研究

严菊芬, 齐宁波, 王素萍, 赵健烽, 杨树林

南京理工大学环境与生物工程学院南京 210094

Mutagenesis and Mutant Genetic Stability of the Endophytic Fungus Gibberella moniliformis EZG0807 from Curcuma wenyujin

YAN Jv-fen, QI Ning-bo, WANG Su-ping, ZHAO Jian-feng, YANG Shu-lin

The School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, China

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摘要：

利用大梯度超导磁体（JMT-16T50F）模拟失重和超重环境对温莪术内生真菌Gibberella moniliformis EZG0807进行诱变，以期得到代谢产物活性高、遗传稳定性好的菌株。诱变24 h、48 h和72 h后，通过稀释涂布平板法得到139株诱变菌株；经滤纸片抑菌法初筛和MTT法抗肿瘤细胞活性实验复筛，筛选出高活性诱变菌株M7226。采用群体传代的方法考察菌株M7226十代以内菌株的生长状况和次级代谢产物抗菌抗肿瘤活性的能力。结果显示活性内生真菌EZG0807经大梯度超导磁体诱变，筛选得到一株代谢产物活性高、遗传稳定性好的诱变菌株M7226，为后续次级代谢产物的分离纯化奠定基础，同时此法为真菌诱变育种提供了一种新的可供选择的方法。

关键词： 诱变; 超导磁体; 内生真菌

Abstract:

In order to obtain a strain with good genetic stability and high activity of secondary metabolites, the wild-type strain Gibberella moniliformis EZG0807 was mutated by a large gradient superconducting magnet (JMT-16T50F) which can simulate micro and hyper-gravity environment. After G. moniliformis EZG0807 was mutated for 24 h, 48 h and 72 h under these conditions, 139 mutants were isolated with the spread plate method. Among them, a highly active mutant M7226 was selected according to the ability of antibacterial and antitumor activity with the filter paper and MTT method, respectively. Furthermore, the biomass of mycelia growth and the bioactivity of secondary metabolites of the strain M7226 within ten generations were investigated to detect its genetic stability. Accordingly, a highly active and stable heritable strain M7226 was got after mutagenesis with the superconducting magnet, which demonstrated that this superconducting magnet can be used as a new method for mutagenesis breeding and laid the foundation for the subsequent separation and purification of secondary metabolites.

Key words: Mutagenesis Superconducting magnet Endophytic fungus

收稿日期: 2014-03-18 出版日期: 2014-05-25

ZTFLH:

Q815

通讯作者: 杨树林 E-mail: yshulin@mail.njust.edu.cn

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引用本文:

严菊芬, 齐宁波, 王素萍, 赵健烽, 杨树林. 温莪术内生真菌Gibberella moniliformis EZG0807诱变及其诱变株遗传稳定性研究[J]. 中国生物工程杂志, 2014, 34(5): 23-29.

YAN Jv-fen, QI Ning-bo, WANG Su-ping, ZHAO Jian-feng, YANG Shu-lin. Mutagenesis and Mutant Genetic Stability of the Endophytic Fungus Gibberella moniliformis EZG0807 from Curcuma wenyujin. China Biotechnology, 2014, 34(5): 23-29.

链接本文:

https://manu60.magtech.com.cn/biotech/CN/10.13523/j.cb.20140504 或 https://manu60.magtech.com.cn/biotech/CN/Y2014/V34/I5/23

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