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Hypersensitive Response to Striga Infection in Sorghum

Dep. of Agronomy, 1150 Lilly Hall of Life Sci., Purdue Univ., West-Lafayette, IN 47907-1150

View larger version (84K): [in a new window]   Fig. 1. Extended agar gel assay allows identification of postinfection host (H) response to Striga (S) in early stages of parasitic development. Susceptible genotypes support normal growth (a) whereas resistant genotypes exhibit a hypersensitive response (b) following haustorial attachment.

View larger version (16K): [in a new window]   Fig. 2. Observation time for onset of necrosis (a) and Striga seedling discouragement (b) as detected with the extended agar gel assay.

View larger version (18K): [in a new window]   Fig. 3. Correlation between number of Striga seedlings attached to host seedling roots with clear necrosis at the haustorial attachment site and the number of attached striga seedlings that were discouraged from penetrating and establishing on sorghum roots.