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ABSTRACT
Zea mays L. (Maize) is an important staple crop in the world; it is widely used for feed and industrial raw material. Maize ranks the third in world production following wheat and rice, due to high demands of this crop a rapid and uniform field emergence is an important factor to achieve high yield to meet the growing demand of this crop. Thus this present study comparatively assessed root of maize seedlings after seed priming with biosynthesized nanoparticles and simulated microgravity. The iron contents of the soils collected from transplanting were determined to be ferrugenic (>150mg/kg), to achieve the objectives of this experiment, the iron content of the ferruginous soil were elevated by a factor of 1 Ecological Screening Value. The 40 hybrid maize seedlings were exposed to priming regimes, then the seeds were subjected to microgravity effect for 120 hours at a speed of 0.5rpm, after which the seeds were moved to the iron elevated soil for acclimatization. The results of this research showed that microgravity and nanoparticles application on the primed maize seedlings increased the growth perimeters compared to the control treatment, for example; increase in elongation rates were reported for plant that were pretreated with microgravity before they were sown in iron polluted soils (0.98 cm per day). The findings of this research showed the potential of using microgravity and nanoparticles based stimulators enhanced the growth of Zea mays, amidst the abiotic stress factor that was presents in the soil. In this light further study can be carried to assess the effects of microgravity and nanoparticles on the crop yield of primed Zea mays seedlings, because some treatments may show positive impacts after prolong applications on the plants, the growth of the plants will be apprehended.
