Potassium Supply Influences Molybdenum,Nitrate, and Nitrate Reductase Activity in Eggplant |
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| Abstract: | Abstract Greenhouse experiments were conducted for two years (1993–1994) with eggplants to study the impact of potassium (K) as K2SO4 (0.5 mM, 1 mM, 2 mM, and 3 mM) on molybdenum (Mo) distribution and on aspects of nitrate (NO3 ?) metabolism, and fruit quality. The nitrates and Mo in leaf blades, petioles, and fruits as well as foliar in vivo nitrate reductase (NR; E.C. 1.6.6.1) activity were analyzed. In view of these results, the K application at levels exceeding 0.5 mM K, altered the NO3 ? and Mo status and distribution in the aboveground organs of eggplant. The 3 mM K distributed the NO3 ? proportionally between leaf blades, petioles, and fruits. The 0.5 mM K and the 1 mM K increased the NO3 ? and Mo concentration in fruits, respectively. These results indicated the 3 mM K the most appropriate treatment for the greenhouse eggplant production under Mediterranean climate conditions, with reduced NO3 ? density in fruits for human consumption. |
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| Keywords: | Fruit Leaf Nitrogen Solanum melongena |
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