Study on the effect of laser irradiation on wheat ( Triticum aestivum L.) variety PBW-373 seeds on zinc uptake by wheat plants

The present study was carried out to investigate the effect of He–Ne laser irradiations on wheat (Triticum aestivum L.) variety PBW-373 seeds on uptake and internal distribution of zinc ion in wheat plants for different irradiation time in soil culture. The transport of zinc from root system to shoot and grain was studied by incorporating radioactive zinc as zinc chloride (Zn*Cl2) with the nutrient solution to the plants. The 65Zn activity absorbed by the matured plants and distributed in different parts (root, shoot and grain) was measured with a calibrated NaI (Tl) gamma ray spectrometer. The results led the conclusion that translocation of zinc from shoot to grain in mature plants in treated soaked seeds showed a better result in comparison to dry treated and control seeds. The utilization of zinc from roots to shoots was higher in the plants grown from dry seeds in all given treatments and from shoot to grain was best in soaked seeds at 2 min irradiation period.