Sugar beet plants grown in-vitro and treated with toxin extracts. Plants exhibited varying degrees of damage one day after treatment with cercosporin extracts from various fungal isolates and mutants. Plants treated with cercosporin from wild type Ahlburg and Ferrara became necrotic and black (left), but plants treated with cercosporin extract of the Ahlburg disruption strain 2-1 remained green and healthy, comparable with the plant treatment with water which served as the negative control (right). Experiments were repeated three times with five plants for each extract.
Staerkel et al. BMC Plant Biology 2013 13:50 doi:10.1186/1471-2229-13-50