Fig. 2From: Induction of potato systemic resistance against the potato virus Y (PVYNTN), using crude filtrates of Streptomyces spp. under greenhouse conditionsThe effect of different SCF on PVYNTN concentrations in leaves of four potato cultivars using DAS- ELISA treated with SCF (SCF7, SCF11, and SCF20) at 7 and 21 days after virus inoculation (DAVI). SCF7 = Streptomyces netropsis DSM 40093, SCF11 = Streptomyces ambofaciens, and SCF20 = Streptomyces actuosus. Columns represent mean of OD values at 405 nm of PVYNTN level using ELISABack to article page