Actinobacteria: Antiviral and Phytostimulating Activity

The phytotoxicity and antiviral activity of three strains of actinobacteria, Streptomyces carpaticus RCAM04697 (SCPM-O-B-9993), Nocardiopsis umidischolae RCAM04882, and Nocardiopsis umidischolae RCAM04883, were studied. For seven days, the bacterial cells were cultivated on starch–casein, potato–glucose, or Gause’s medium. Using immune-chromatography assay, we showed all three Actinobacteria strains exhibiting antiviral activity against Cucumber mosaic virus (CMV) on tomato plants. The maximum efficiency (100%) against CMV was found for a three-day suspension of the S. carpaticus strain RCAM04697 (SCPM-O-B-9993) on all nutrient media. Suspensions of all three strains obtained by cultivating for 1, 2, 6, and 7 days did not inhibit replication of the phytovirus.