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Seed physiology of four African Romulea species

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Romulea diversiformis, R. flava, R. monadelpha and R. rosea are potential new ornamental crops. No literature has been published so far on the germination physiology of these species. To investigate the physical properties of the seeds of these species, imbibition rate, moisture content and viability of seeds were determined. To determine the optimum seed germination conditions, the effect of acid and mechanical (sand paper) scarification, plant growth promoting substances, deficiency of nitrogen, phosphorous and potassium, cold and warm stratification, temperature and light were examined. Experiments revealed that R. diversiformis and R. rosea seed germinate best at 10°C. R. flava showed the best germination when cold stratified (5°C) for 21 days. Dark conditions were favourable for R. monadelpha germination at 15°C. Seeds of R. diversiformis, R. flava and R. monadelpha may have non-deep endogenous morphophysiological dormancy.
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Document Type: Research Article

Publication date: July 1, 2011

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  • Seed Science and Technology (SST) is one of the leading international journals featuring original papers and review articles on seed quality and physiology as related to seed production, harvest, processing, sampling, storage, distribution and testing. This widely recognised journal is designed to meet the needs of researchers, advisers and all those involved in the improvement and technical control of seed quality.
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