Fig. 2: Different severity of black spots on the adaxial surface of cotyledons of I. hawkeri plants inoculated with P. obducens spores. | Horticulture Research

Fig. 2: Different severity of black spots on the adaxial surface of cotyledons of I. hawkeri plants inoculated with P. obducens spores.

From: Integration of early disease-resistance phenotyping, histological characterization, and transcriptome sequencing reveals insights into downy mildew resistance in impatiens

Fig. 2

Based on the coverage of black spots on the inoculated cotyledon, black spot severity was scored in a scale of 0 to 4. A scale 0, no black spots; B scale 1, black spots covering less than ¼ of the cotyledon; C scale 2, black spots covering ¼ to ½ of the cotyledon; D scale 3, black spots covering ½ to ¾ of the cotyledon; and E scale 4, black spots covering more than ¾ of the cotyledon

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