Mycobiology.  2006 Jun;34(2):67-72.

Resistance Induction and Enhanced Tuber Production by Pre-inoculation with Bacterial Strains in Potato Plants against Phytophthora infestans

• Kim HJ
• Jeun YC

Abstract

Efficacy of resistance induction by the bacterial isolates Pseudomonas putida (TRL2-3), Micrococcus luteus (TRK2-2) and Flexibacteraceae bacterium (MRL412), which were isolated from the rhizosphere of plants growing in Jeju Mountain, were tested in a greenhouse. The disease severity caused by Phytophthora infestans was effectively reduced in the potato plants pre-inoculated with bacterial isolates compared with those of the untreated control plants growing in a greenhouse. In order to estimate the level of protection by the bacterial isolates, Mancozeb WP (Diesen M(R), Kyong nong) and DL-3-amino butyric acid (BABA) were pre-treated, whereas Dimethomorph WP (Forum(R), Kyong nong) and phosphonic acid (H3PO3) were post-treated the challenge inoculation with the pathogen. Disease severities of chemical pre-treated as well as post-treated plants were reduced compare to those of the untreated. The disease reduction in the plants pre-treated with Mancozeb WP was the highest, whereas that of post-treated with Dimethomorph WP was the lowest. The yields of plants pre-inoculated with three bacterial isolates were greatly increased than those of control plants. These results suggest that biological control by bacterial isolates might be an alternative strategy against late blight disease in potato plants growing in greenhouse.

Keyword

DL-3-amino butyric acid (BABA); Dimethomorph WP (Forum(R)); Induced systemic resistance; Mancozeb WP (Diesen M(R)); Phosphonic acid (H3PO3); Phytophthora infestans; Plant growth promoting rhizobacteria (PGPR); Potato

MeSH Terms

Butyric Acid
Cytophagaceae
Micrococcus luteus
Phytophthora infestans*
Phytophthora*
Pseudomonas putida
Rhizosphere
Solanum tuberosum*
Butyric Acid