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. 2022 Sep 30;23(19):11563. doi: 10.3390/ijms231911563

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© 2022 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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Analysis of enzyme activity involved in nitrogen assimilation in duckweed after nitrogen starvation for 6 days: (a) Nitrate reductase activity; (b) Nitrite reductase activity; (c) Glutamine synthetase activity; and (d) Glutamate synthase activity. Values given are mean ± standard error (n = 3). The asterisk symbol (*) represents statistically significant differences (p < 0.05), and the double asterisk symbol (**) indicates highly significant differences (p < 0.01) according to one-way ANOVA.