ACTA AGRICULTURAE BOREALI-SINICA ›› 2016, Vol. 31 ›› Issue (4): 106-111. doi: 10.7668/hbnxb.2016.04.018

Special Issue: Cucumber

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GFP-Marking and Colonization on Cucumber of Bacillus subtilis BSD-2

HAO Huijuan1,2,3, LIU Hongwei2,3, YIN Shuli2,3, LIU Qianqian2,3, ZHANG Liping2,3, SONG Shuishan2,3   

  1. 1. College of Chemical Industry, Hebei University of Technology, Tianjin 300130, China;
    2. Biology Institute, Hebei Academy of Sciences, Shijiazhuang 050081, China;
    3. Hebei Engineering and Technology Center of Microbiological Control on Main Crop Disease, Shijiazhuang 050081, China
  • Received:2016-06-11 Published:2016-08-28

Abstract: For the purpose of exploring the colonization on the cucumber,the Bacillus subtilis BSD-2 had remarkable control effect on the Botrytis cinerea. In this study,the plasmid of pGFP4412 that contains green fluorescent protein gene(GFP) was transformed into the Bacillus subtilis BSD-2 by modified electroporation.The plasmid stability,growth curve and the inhibition activity of GFP-labeled strains were measured.The results showed that the GFP-tagged strain could emit green fluorescence successfully.The tagged strain nearly had the same trend with the wild type strain in growth.The stability of GFP-marked in engineering B.subtilis BSD-2 strain was 86% after transference of culture 56 hours continuously without selective pressure.Inhibition activity showed that the GFP-marked strain exhibited the comparable ability as the wild type strain to inhibit Fusarium oxysporum and Botrytis cinerea.Observation by fluorescence microscope indicated that the GFP-tagged BSD-2 could colonize on the root tissue after inoculated 24 hours.It could be seen on the leaf veins after five days.It still could be observed on the leaf veins after 50 days.All of these data indicated that the GFP-marked strain could colonize on the cucumber so properly that stopped pathogens to invade the plant.

Key words: Bacillus subtilis, GFP, Fusarium oxysporum, Botrytis cinerea, Inhibitory activity

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Cite this article

HAO Huijuan, LIU Hongwei, YIN Shuli, LIU Qianqian, ZHANG Liping, SONG Shuishan. GFP-Marking and Colonization on Cucumber of Bacillus subtilis BSD-2[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2016, 31(4): 106-111. doi: 10.7668/hbnxb.2016.04.018.

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