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Current Trends in Biotechnology and Pharmacy
Year : 2008, Volume : 2, Issue : 1
First page : ( 178) Last page : ( 182)
Print ISSN : 0973-8916. Online ISSN : 2230-7303.

Efficacy of Antimicrobial Metabolites of Pseudomonas fluorescens Against Rice Fungal Pathogens

Reddy B. P.*, Reddy K. R. N.*, Rao M. Subba, Rao K. S.

Dept. of Chemistry and Biochemistry, Acharya Nagarjuna University, Nuzvid campus, Nuzvid-521 201, Andhra Pradesh, India

*Plant Pathology, Directorate of Rice Research, Rajendranagar, Hyderabad-500 030, Andhra Pradesh, India

*For correspondence -b_p_reddy2002@yahoo.com


Ten isolates of Pseudomonas fluorescens obtained from rice rhizosphere were tested for antifungal activity against Magnaporthe grisea, Dreschelaria oryzae, Rhizoctonia solani and Sarocladium oryzae that are known to attack rice plants. One isolate, P. fluorescens 8 effectively inhibited the mycelial growth in all these fungi in dual culture tests (50–85%). All the ten isolates of P. fluorescens were tested for the production of siderophore, hydrogen cyanide and salicylic acid. The isolate P. fluorescens 8 showed higher production of siderophore, HCN and salicylic acid.



P. fluorescens, antimicrobial metabolites, rice, fungal pathogens.


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