会议专题

The use of coconut fiber and antagonistic Pseudomonas CMR12a for biological control of Rhizoctonia damping-off on Chinese cabbage (Brassica rapa)

Isolated from cocoyam roots in Cameroon, Pseudomonas CMR12a has been explored as a promising antagonistic agent due to its capacity to produce phenazines and biosurfactants. CMR12a and mutants of this strain impaired in phenazine and/or biosurfactant production, were applied at a concentration of 107 CFU g﹣1 soil to control damping-off caused by Rhizoctonia solani AG 2-1 on Chinese cabbage. Data recorded 14 days after inoculation indicated that disease severity had decreased from 3.5 to 1.42 in CMR12a-treated seedlings. In soil inoculated with phenazine-or biosurfactant-deficient mutants, seedlings were partially protected and disease score was 2.29 and 1.96, respectively. However, the disease suppressive effect was completely lost in soil inoculated with a mutant impaired in the production of both compounds. These data suggest that both phenazines and biosurfactants were responsible for the profound effects of Pseudomonas CMR 12a.

Rhizoctonia solani sclerotia phenazines biosurfactants coconut fiber biocontrol

G. K. H. Hua M. H(o)fte

Dept. of Crop Protection, Ghent University, Belgium

国际会议

The 2nd Asian PGPR Conference(第二届亚洲植物促生根际细菌会议)

北京

英文

230-236

2011-08-21(万方平台首次上网日期,不代表论文的发表时间)