Effect of Gamma-ray Radiation on Morphological Development of Orthosiphon stamineus (Cat Whisker)

摘要

In this study, the vegetative parts of Orthosiphon stamineus were exposed to gamma radiation with 3, 6, 9 and 12 minutes exposure time period by using gamma cell 220 Co-60 machines at 0.08344 Gy dosages to investigate the effect of gamma ray. After 7 weeks of gamma ray radiation, plant survival percentages, height of plants, number of leaves, chlorophyll and carotenoid content were recorded and calculated every week. Survival rates of gamma ray irradiated explants of Orthosiphon stamineus were changed dramatically. It was found that the height of plant and number of leaves per plant was decreased following irradiation. Gamma ray irradiation also inhibited chlorophyll and carotenoid content compared to non-irradiated plants which showed higher content of chlorophyll and carotenoid.