Fig. 7From: Genetic variation for tolerance to the downy mildew pathogen Peronospora variabilis in genetic resources of quinoa (Chenopodium quinoa)Microscopic and histopathological imaging of Peronospora variabilis. a Sporangiophore and spores. b Spore and hyphae penetrating a stoma during infection (cultivar Blanca, 7 days after inoculation). c Branched sporangiophore bearing sporangia emerging from leaf surface. Scale bar is 20 um for (a), (b), and 100 um for (c)Back to article page