ISHS Acta Horticulturae 108: International Cashew Symposium
STUDIES ON THE EFFECT OF PLANT GROWTH REGULATORS ON CASHEW |
| Author: | K.G. SHANMUGAVELU |
| Abstract:
The extracts of cashew seeds when chromatographically assayed, showed to contain natural auxin IAA with an Rf of 0.30 and is very much similar to synthetic IAA. One more spot on the same chromatogram was found with biological activity in the slit hypocotyl of black gram. This compound was unidentified. The effect of plant growth regulators viz. GA, IBA, NAA and CIPA at 100 to 500 ppm for seed treatment, 25 to 100 ppm spray treatment and 0.1 – 0.4 per cent in lanolin paste on the seeds and seedlings was studied. Invariably all the growth regulators except CIPA stimulated high percentage of seed germination. CIPA at all concentrations inhibited the germination and root development. GA induced stem elongation in seedlings was due to increase in the cell number and cell elongation as observed in the cortex and pith regions of the stem sections of the second internode. The fresh and dry weights of shoots and roots showed increase with GA treatment. | |
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