Abstract
Influences of carbon adaptation on antagonistic activities of three Pseudomonasaeruginosa strains V4, V7 and V10 against Fusarium oxysporum f. sp. melonis weredetermined in this study. Results from this study showed that the P. aeruginosastrains and their adapted strains significantly inhibited the growth of mycelium of F. oxysporum f. sp. Melonis, while in vitro inhibition of P. aeruginosa on the mycelial growth was unaffected by carbon adaptation. In general, the growth of strain V4 and its antagonistic ability was unaffected by carbon adaptation. However, the growth of the adapted strains V7-C and V10-C was superior to the corresponding parental strains when root exudates were used as a sole carbon source. In addition, the adapted strains V7-C and V10-C caused a more decrease in Fusarium infection of melon compared with the corresponding parental strains. Overall, this study revealed that adaptation culture of P. aeruginosa strains on carbon-limited media may play an important role in the inhibition of Fusarium wilt of melon seedlings although the effect of carbon adaptation may depend on the test strain. Key words: Melon, biocontrol, Fusarium wilt, in vitro, in vivo.
Highlights
Full Length Research PaperCarbon adaptation influence the antagonistic ability of Pseudomonas aeruginosa against Fusarium oxysporum f. sp. melonis
The use of antagonistic bacteria to control soil-borne diseases has been widely explored (Haggag, 2007; Li et al, 2007, 2010; Nwaga et al, 2007; Algam et al, 2010; Charoenporn et al, 2010)
This study revealed that adaptation culture of P. aeruginosa strains on carbon-limited media may play an important role in the inhibition of Fusarium wilt of melon seedlings the effect of carbon adaptation may depend on the test strain
Summary
Carbon adaptation influence the antagonistic ability of Pseudomonas aeruginosa against Fusarium oxysporum f. sp. melonis. Carbon adaptation influence the antagonistic ability of Pseudomonas aeruginosa against Fusarium oxysporum f. Influences of carbon adaptation on antagonistic activities of three Pseudomonas aeruginosa strains V4, V7 and V10 against Fusarium oxysporum f. Results from this study showed that the P. aeruginosa strains and their adapted strains significantly inhibited the growth of mycelium of F. oxysporum f. While in vitro inhibition of P. aeruginosa on the mycelial growth was unaffected by carbon adaptation. The growth of strain V4 and its antagonistic ability was unaffected by carbon adaptation. This study revealed that adaptation culture of P. aeruginosa strains on carbon-limited media may play an important role in the inhibition of Fusarium wilt of melon seedlings the effect of carbon adaptation may depend on the test strain
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