ISHS Acta Horticulturae 306: International Symposium on Medicinal and Aromatic Plants, XXIII IHC
IMPROVEMENT OF TUBERISATION MEDICINALLY IMPORTANT DIOSCOREA AND COSTUS |
| Authors: | R.P. Nandi, S.K. Chatterjee |
| Abstract:
Experimental results revealed that tuberisation process in Dioscorea and Costus was more vigorous in plants growing at lower elevations as compared to plants at higher elevations whereas formation of diosgenin in tuber was more pronounced in plants at higher altitudes. It could also be shown that by eliminating flower and fruits from panicles of Dioscorea plants, diosgenin content could be increased along with the enhancement of tuberisation process. Studies with NPK showed that application of P, singly or in combination with N, augmented diosgenin formation in contrast to combination treatment of N, P and K which favored formation of tuber. Foliar application of micronutrients like Mn, Mg and B also augmented the tuberisation process accompanied by increase of diosgenin content. GA3 and IAA increased diosgenin content accompanied by shorter duration of reproductive phase and higher flower/fruit ratio. Tuber formation was favored in plants treated with lower concentration of GA3 and IAA. | |
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