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Fusarium graminearum Infection during Wheat Seed Development and Its Effect on Seed Quality

Dep. of Agronomy, Univ. of Kentucky, Lexington, KY 40546-0091

View larger version (24K): [in a new window]   Fig. 1. Fusarium graminearum seed infection (closed symbols) and deoxynivalenol (DON) concentration (open symbols) during seed development of four wheat cultivars in 2000. DAA = days after anthesis; bars indicate ± SEM.

View larger version (19K): [in a new window]   Fig. 2. Visual ratings of (A) fusarium head blight (FHB) severity (Harvests 1 to 5) and (B) severely Fusarium-damaged seeds (Harvests 3 to 10) for four wheat cultivars during seed development in 2001. DAA = days after anthesis; bars indicate ± SEM.

View larger version (25K): [in a new window]   Fig. 3. Fusarium graminearum seed infection (closed symbols) and deoxynivalenol (DON) concentration (open symbols) during seed development for four wheat cultivars in 2001. DAA = days after anthesis; bars indicate ± SEM.

View larger version (21K): [in a new window]   Fig. 4. Standard germination of (A) untreated and (B) treated seeds of four wheat cultivars during seed development in 2001. DAA = days after anthesis; bars indicate ± SEM.

View larger version (15K): [in a new window]   Fig. 5. Relationship of standard germination to Fusarium graminearum seed infection in four wheat cultivars in 2001.

View larger version (25K): [in a new window]   Fig. 6. Wheat seed vigor as measured by accelerated aging germination (closed symbols) and electrical conductivity (open symbols) in four wheat cultivars at various stages of seed development in 2001. Arrows indicate date of physiological maturity (PM) for each cultivar. DAA = days after anthesis; bars indicate ± SEM.