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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- KING E. O., WARD M. K., RANEY D. E. Two simple media for the demonstration of pyocyanin and fluorescin. J Lab Clin Med. 1954 Aug;44(2):301–307. [PubMed] [Google Scholar]
- Schroth M. N., Hancock J. G. Disease-suppressive soil and root-colonizing bacteria. Science. 1982 Jun 25;216(4553):1376–1381. doi: 10.1126/science.216.4553.1376. [DOI] [PubMed] [Google Scholar]
- van Vuurde J. W., Elenbaas P. F. Use of fluorochromes for direct observation of microorganisms associated with wheat roots. Can J Microbiol. 1978 Oct;24(10):1272–1275. doi: 10.1139/m78-203. [DOI] [PubMed] [Google Scholar]