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Wild type (WT) pollen tubes are more sensitive to ethionine and Met. A, In vitro pollen tube lengths after 6 h, with various concentrations of ethionine added to pollen germination medium. Data are means ± se of triplicate experiments. B, In vitro pollen tube lengths after 6 h, with various concentrations of Met added to pollen germination medium. Data are means ± se of triplicate experiments. Dashed lines mark I50 of pollen tube length, black for the wild type and gray for mat3.
