Medina 2003). It was purported that in gamma-irradiated plants, nutrient uptake was enhanced while the gas exchange was increased but not in non-radiated plants; moreover, there were increased activities on the key photosynthetic enzyme RuBisCO and on nitrate reductase, which is essential in nitrogen assimilation (Babu et al. 2012). In contrast, higher doses of radiation (15, 20, and 25 Gy) had plants with significantly shorter and narrower leaves, indicating growth was decreased (Table 6). One reason for the decreased performance of plants exposed to high doses of gamma radiation is the decrease in carbon and nutrient assimilation efficiency, which later translates into decreased plant health and growth
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