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Acetobacter diazotrophicus was isolated from coffee plant tissues and from rhizosphere soils. Isolation frequencies ranged from 15 to 40% and were dependent on soil pH. Attempts to isolate this bacterial species from coffee fruit, from inside vesicular-arbuscular mycorrhizal fungi spores, or from mealybugs (Planococcus citri) associated with coffee plants(More)
Diazotrophic bacteria were isolated, in two different years, from the rhizosphere and rhizoplane of coffee (Coffea arabica L.) plants cultivated in Mexico; they were designated as type DOR and type SAd isolates. They showed characteristics of the family Acetobacteraceae, having some features in common with Gluconacetobacter (formerly Acetobacter)(More)
Sixty Azospirillum strains were tested for their bacteriocin production ability; twenty-seven (45%) were able to produce bacteriocins and inhibited the growth of one or more indicator strains in solid medium. Mitomycin C treatment enhanced the proportion to 80%. Sometimes large growth inhibition zones were formed, but not when FeCl3 was added in the medium.(More)
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