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Abstract :

Seed scarification studies in six medicinal plants namely, Anaphalis elliptica DC., Ceropegia pusilla W.&A., Hedyotis articles Br., Heracleum rigens Wall., Leucas vestita Benth. and Luzula campestris DC. inhabiting the Nilgiri Biosphere Rese Western Ghats were carried out to know their germinability. The results showed that the seed germination re increased in all the six species by seed treatment with the growth promoter, Indole Acetic Acid (IAA) at 100-150ppm. The growth promoter, Napthalene Acetic Acid (NAA) at 100-150ppm also influenced seed germination percentage of the four species viz., Ceropegia pusilla, Heracleum rigens, Leucas vestita and Luzula campestris. The growth hormone, Gibberel Acid (GA) at 100-150ppm was found to be effective for seed germination in three species viz., Hedyotis articula Heracleum rigens and Leucas vestita. It is concluded that the treatment of seeds with the growth promoters IAA, NAA GA, at the concentration between 100-150ppm are more effective for the germination of seeds of all the six specie studied. It is suggested that the sowing of seeds in suitable micro-sites of grasslands of Nilgiri Biosphere Reserve after this standardized treatment can be practised to enhance the populations of these plants considerably.