Gincy P Thottathil, Elizabeth Samuel and M Haridas
Keywords: Llipase, light, red light, germination.
Abstract: Influence of blue, green, yellow, orange, red and white lights on lipase activity of Oryza sativa L. (Jyothi), Vigna unguiculata (L.) Walp. (Kanakamani) and Arachis hypogaea L. (CO-3) seedlings was analysed and it showed plant-wise variations. Considering the initial 7 days of development of the seedlings, green light for O. sativa, yellow light for V. unguiculata and red light for A. hypogaea were more influential in inducing lipase activity. In A. hypogaea, lipase activity was significantly higher under red light than other wavelengths from 2nd to 5th day which is the active period of seedling establishment. In Oryza sativa red light induced significant variation only on certain days. In Vigna unguiculata red light seemed to be least effective in stimulating lipase activity except on the first day. Thus effect of red light on lipase activity is species dependent and arguably, it depends on the lipid content of the seed. Blue wavelength exposure depressed the lipase activity in all the three seedlings studied.
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