Antibiotic production of the biocontrol agents Epicoccum nigrum and Candida sake

Abstract

In the framework of the study of the mode of action of biocontrol agents (BCAs) it is important to know if BCAs are antibiotic-producers. Epicoccum nigrum 282 and Candida sake CPA-1 are BCAs effective against post-harvest pathogens of stone and pome fruits. The antibiotics produced by these BCAs and the relationship to biocontrol were studied. Production of antibiotics by E. nigrum in in vitro cultures began at 5 days of incubation being maximal at different times depending on media used. However, no antibiotic was detected when E. nigrum was grown in a solid state-fermentation system or in peaches. In the case of C. sake, no antibiotic was detected either in vitro, in liquid fermentation cultures of the yeast, or in apples.

The Potential of Novel Bacterial Isolates from Natural Soil for the Control of Brown Rot Disease (Monilinia fructigena) on Apple Fruits

“…Also, Falconi and Mendgen [42] showed that isolates of Aureobasidium pullulans, Epicoccum nigrum, Sordaria fimicola and Trichoderma polysporum, applied individually or in combination, provided the best protection against M. fructigena. Larena et al [43] have shown that the antibiotic produced by Epicoccum nigrum and Candida sake are effective against postharvest pathogens infecting apple fruits, including Monilinia spp. In addition, the treatment of apple fruits with Pantoea agglomerans strain EPS125 has significantly reduced the brown rot disease (M. laxa) incidence and the lesion diameter it causes.…”

Fungal Communities Associated with Peacock and Cercospora Leaf Spots in Olive

“…The high incidence of these two genera in fungal communities inhabiting olive and other plants has been previously reported [30,42], however data comparing their presence with V. oleaginea and/or P. cladosporioides are inexistent. Alternaria and Epicoccum genera are both members of the Dothideomycetes, which are known to possess effective antagonistic mechanisms [42,43,44,45,46].…”