Seed emergence capacity from different depths in sorghum genotypes and ethylene produced by the shoot apices

Production of ethylene in long and short mesocotyl varieties of sorghum was measured at different phases of seedling growth. Seedlings which had to emerge out from the deeper depths, showed presence of less amount of ethylene as compared to those which were sown nearer to the surface or in petridishes. Genotypes having short mesocotyl produced significantly higher amount of ethylene thin those with long mesocotyl.