Main Article Content

Abstract

Attempts were made to isolate beneficial bio agents from rice rhizosphere which resulted in isolation of  46 Bacillus spp and 15 fluorescent Pseudomonas spp which were further investigated for their potential aginst BB of rice diseaseAmong twenty six isolates of Bacillus, two isolates were most antagonistic and showed highest inhibition percentage (57.09) The potential isolates of Pseudomonas (P-4, P-5, P-6, P-7 and P-8), Bacillus (ARI 1-2, ARI 2-4, ARI 1-3, D1-1-2 and D2-1-1) were tested in vivo under glass house conditions for antagonism against Xoo which revealed that P-7 was effective in reduction of lesion length (18.5cm) when compared to control (20.37cm). The potential isolates of Pseudomonas (P-4, P-5, P-6, P-7 and P-8), Bacillus (ARI 1-2, ARI 2-4, ARI 1-3, D1-1-2 and D2-1-1) were tested in vivo under glass house conditions for antagonism against Xoo which revealed that P-7 was effective in reduction of lesion length (18.5cm) when compared to control (20.37cm). The present study indicated that PGPR isolates P-4, P-6, P-7 and P-8 can be used as biofertilizers, which will add up for enhanced growth of rice. 


 

Keywords

Antagonism Inhibition Rhizosphere

Article Details

How to Cite
N., Y. sousheel, Narayan Bhat, B. ., Laha, G. S., & Triveni, S. (2021). Antagonistic activity of rice rhizosphere isolates against Xanthomonas oryzae pv. oryzae bacterial blight pathogen. Environment Conservation Journal, 22(3), 211–215. https://doi.org/10.36953/ECJ.2021.22325

References

  1. Dev, N., & Dawande, A. Y. (2010). Biocontrol of soil borne plant pathogen Rhiozoctonia solani using Trichoderma spp. and Pseudomonas fluorescens. Asiatic Journal of Biotechnology Resources, 1, 39-44.
  2. F.A.O. (2016-17). FAOSTAT Agriculture data (online). In: http://www.fao.org/and http://faostat.fao.org./. Rome, Italy : Food and Agriculture Organization (FAO).
  3. Ganeshan, G., & Manoj Kumar, A. (2005). Pseudomonas fluorescens, a potential bacterial antagonist to control plant diseases. Journal of Plant Interactions, 1(3), 123-134. DOI: https://doi.org/10.1080/17429140600907043
  4. Laha, G.S., Virakthamath, B.C & Priyanka (2009). Bacterial blight of rice and its management. Technical Bulletin No.4.Directorate of Rice Research (ICAR), Rajendranagar, Hyderabad-500 030, Andhra Pradesh, India.37 pp.
  5. Saikia, P., & Chowdhury, H. D. (1993). Phylloplane microflora for the control of bacterial leaf blight of rice caused by Xanthomonas oryzae pv. oryzae. Indian Phytopathology, 46, 218-218..
  6. Wu, L., Goh, M. L., Sreekala, C., & Yin, Z. (2008). XA27 depends on an amino-terminal signal-anchor-like sequence to localize to the apoplast for resistance to Xanthomonas oryzae pv oryzae. Plant Physiology, 148(3), 1497-1509. DOI: https://doi.org/10.1104/pp.108.123356

Most read articles by the same author(s)