Seeds from two cotton varieties attained similar maximum germination percentages at 30°C. Failure of germination occurred at 15 and 45°C. At lower and higher temperatures than 30°C maximum germination percentages were lower and the periods before germination was intiated longer. Fumigation of seeds with methyl bromide decreased their maximum emergence percentages in the field, but dressing seeds with mercuric compounds had no effect on emergence. During the first 20 days of seed development the accumulation of total dry-matter and oil was rapid and then it continued at a steady and slower rate till day 52. A linear relationship existed between the oil and residual dry-matter content of developing seeds. The disappearance of oil from the cotyledons of germinating seeds was gradual over the period of 5 days of germination while that of starch was very rapid during the first day, thereafter very little starch was mobilized from the cotyledons to the embryo.
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ABDELMAGID et al. (1977) studied this question.