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Germination of sporangia of P. ultimum in response to 2-h seed exudates (A, C, and E) and 6-h seed exudates (B, D, and F) from different plant species. Seeds with high (A and B), moderate (C and D), and low (E and F) levels of exudation were used (grouped according to the level of solid exudation at 2 h). Means ± standard deviations (error bars) are shown.
