Effect of laser irradiation on seed germination parameters and phosphorus uptake in maize (Zea mays L.) plants
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Date
2004-07
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G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand)
Abstract
The effect of laser irradiation on seed germination, plant parameters (shoot, root lengths, plants heights, vigour indices and leaves' sizes) and phosphorus uptake has been studied in two varieties (Surya and Pragati) of maize (Zea mays L.). The seeds were irradiated for different period of times i.e. 0s (control), 60s, 120s, 180s and 240s by 632.8 nm He-Ne Laser beam. Seeds were grown in petridishes and pots. Results suggested that the 60s irradiated seeds showed the best germination percentage, plant parameter and phosphorus uptake. The higher irradiation caused negative effects on these parameters. These results also suggested that the effect of irradiation was greater in the Pragati variety (V2). The results have been understood in terms of the changes in two morphological forms of phytochromes and the phytohormones as a results of laser irradiation of the seeds.
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