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Xing-Yu Li, Jing-Jing Yang, Zi-Chao Mao, Hon-Hing Ho, Yi-Xing Wu, Yue-Qiu He. Enhancement of Biocontrol Activities and Cyclic Lipopeptides Production by Chemical Mutagenesis of Bacillus subtilis XF-1, a Biocontrol Agent of Plasmodiophora brassicae and Fusarium solani, Indian Journal of Microbiology, 2014, DOI 10.1007/s12088-014-0471-y
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lixingyu: ½ð±Ò+5, ¡ï¡ï¡ïºÜÓаïÖú 2014-11-08 10:42:31
jssxh: LS-EPI+1, Çë¼ÌÐø¹Ø×¢±¾°æ¿é 2014-11-12 08:27:35
lixingyu(sunshan4379´ú·¢): ½ð±Ò+5 2014-11-12 10:26:37
Enhancement of Biocontrol Activities and Cyclic Lipopeptides Production by Chemical Mutagenesis of Bacillus subtilis XF-1, a Biocontrol Agent of Plasmodiophora brassicae and Fusarium solani.

×÷Õß:Li, Xing-Yu; Yang, Jing-Jing; Mao, Zi-Chao; Ho, Hon-Hing; Wu, Yi-Xing; He, Yue-Qiu

Indian journal of microbiology

¾í:54

ÆÚ:4

Ò³:476-9

DOI:10.1007/s12088-014-0471-y

³ö°æÄê:2014-Dec (Epub 2014 May 23)
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Bacillus subtilis XF-1 has been used as a biocontrol agent of clubroot disease of crucifers infected by Plasmodiophora brassicae, an obligate pathogen. In order to maximize the growth inhibition of the pathogen, random mutagenesis using N-methyl-N'-nitro-N-nitrosoguanidine was applied to strain XF-1. The efficacy of 226 selected mutants was assessed against the growth of an indicator fungal pathogen: Fusarium solani using agar plate assay and the disruptive effects on the resting spores of P. brassicae. Four mutants exhibited inhibition activity significantly higher than the wild type. The cell extracts of these mutants and the XF-1 were subjected to matrix-assisted laser desorption ionization-time of flight mass spectra analysis, and three families of cyclic lipopeptides (CLPs) fengycin, surfactin and iturin were identified from the parental strain and the screened mutants. However, the relative contents and compound diversity changed after mutagenesis, and there was slight variation in the surfactin and fengycin. Notably, only 5 iturin components were discovered from the wild strain XF-1, but 13 were obtained from the mutant strains, and the relative CLPs contents of all mutant strains increased substantially. The results suggested that CLPs might be one of main biocontrol mechanisms of the clubroot disease by XF-1. The 4 mutants are far more effective than the parental strain, and they would be promising biocontrol candidates not only against P. brassicae but probably other plant diseases caused by fungi.

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¹Ø¼ü´ÊÁбí:Cyclic lipopeptides; Fengycin; Iturin; MALDI-TOF-MS; Surfactin
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µØÖ·:National Engineering Center of Application Technologies for Agricultural Diversity, Yunnan Agricultural University (YAU), Kunming, 650201 People's Republic of China.
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ÎÄÏ×ÀàÐÍ:Journal Article

ÓïÖÖ:English

PubMed ID:25320450

NLM Ψһ ID:0374703

´´½¨ÈÕÆÚ: 16 Oct 2014     Íê³ÉÈÕÆÚ: 16 Oct 2014     ÐÞ¶©ÈÕÆÚ: 18 Oct 2014

µç×Ó³ö°æ:23 May 2014

¹ú¼Ò/µØÇø: India

ISSN:0046-8991
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