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This study was conducted to determine if changes in the raffinose : sucrose ratio in embryos of shrunken-2 sweet corn (Zea mays L.) hybrids were related to differences in seed leachate conductivity between two hybrids harvested at four maturities and artificially dried to 0.10 g H 2 O/g fresh weight. The ratio of raffinose : sucrose differed for 'Crisp N' Sweet 710' (CNS) and 'How Sweet It Is' (HSII). The mass ratio of raffinose : sucrose in CNS was >0.3 in seed harvested between 0.44 to 0.64 g H 2 O/g fresh weight and increased as seed dried from the initial harvest moisture to 0.10 g H 2 O/g fresh weight. Raffinose : sucrose ratios of HSII were <0.3 at all harvests between 0.55 to 0.72 g H 2 O/g fresh weight, but changes during desiccation were not as pronounced. Leachate conductivity of whole seeds of CNS and HSII decreased as seeds were harvested at progressively lower moisture contents. We suggest that a higher raffinose : sucrose ratio may be indicative of increased seed vigor in shrunken-2 hybrids.

Seed Maturity and Desiccation Affect Carbohydrate Composition and Leachate Conductivity in shrunken-2 Sweet Corn