Studies on the Germination of the Seeds ofStriga hermonthica

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Abstract
Data are presented which show the effect of the natural stimulating solution on the respiration of the seeds of Striga hermonthica . The stimulating solution has been shown to enhance the aerobic respiration of seeds exposed to it, compared with that of seeds to distilled water at the same temperature. This effect on the respiration of the seeds is quite independent of any previous moisture-treatment of the seeds, and thus of germination. The maximum anaerobic rate of carbon-dioxide output of air-dry seeds after treatment with the stimulating solution may be up to fifteen times greater than that of seeds moistened with distilled water. The anaerobic respiration of air-dry seeds after exposure to the stimulating solution is greatly reduced by 0·025 M. sodium fluoride and 0·001 M. sodium monoiodoacetate. The stimulating solution has been found to have little effect on the anaerobic output of carbon dioxide from seeds which had been moisture-treated for 6 days at 22° C. before treatment with the stimulating solution. No correlation could be established between the effects of the stimulating solution on germination and respiration.

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