Nitrate reductase activity in corn seedlings as influenced by Arthrobacter sp.

Nitrate reductase activity has been assayed in corn seedlings grown in a nutrient solution containing different concentrations of nitrate and inoculated with Arthrobacter sp. The enzymatic activity was greatly enhanced especially at the levels of NO3-ions suboptimal for the maximum induction. The ability of synthetic phytohormones (IAA, IPA and GA3) in inducting nitrate reductase activity has been also texted.