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Appl Environ Microbiol. Sep 1987; 53(9): 2056–2059.
PMCID: PMC204057

Evaluation of Pseudomonas fluorescens for Suppression of Sheath Rot Disease and for Enhancement of Grain Yields in Rice (Oryza sativa L.)

Abstract

Pseudomonas fluorescens strains antagonistic to Sarocladium oryzae, the sheath rot (Sh-R) pathogen of rice (Oryza sativa L.), were evaluated in greenhouse and field tests for suppression of Sh-R severity and enhancement of grain yields of rice. Imprints of rice seedlings and a direct-observation technique of staining roots with fluorochromes confirmed the association of P. fluorescens with roots and the ability of the strain to move along shoot tips. In greenhouse tests, P. fluorescens-treated rice plants (cv. IR 20) showed a 54% reduction in the length of Sh-R lesions. In three field tests, treatment with P. fluorescens reduced the severity of Sh-R by 20 to 42% in five rice cultivars. Bacterization of rice cultivars with P. fluorescens enhanced plant height, number of tillers, and grain yields from 3 to 160%.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.
  • KING EO, WARD MK, RANEY DE. Two simple media for the demonstration of pyocyanin and fluorescin. J Lab Clin Med. 1954 Aug;44(2):301–307. [PubMed]
  • Schroth MN, Hancock JG. Disease-suppressive soil and root-colonizing bacteria. Science. 1982 Jun 25;216(4553):1376–1381. [PubMed]
  • van Vuurde JW, Elenbaas PF. Use of fluorochromes for direct observation of microorganisms associated with wheat roots. Can J Microbiol. 1978 Oct;24(10):1272–1275. [PubMed]

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