Abstract

The seeds ofAsteracantha longifolia prefer germinating in light. Germination was also favoured in blue and red lights, whereas total darkness delayed this process. The optimum temperature for germination of seeds was 29° C in continuous white light. The seeds did germinate in total darkness as well, but the percentage of germination remained poor, and with high temperatures beyond 30° C, the pace of germination became slow. Higher temperatures suppressed the seedling growth both in continuous white light and total darkness. Blue and red lights promoted hypocotyl growth, whereas radicle was inhibited.

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