Summary
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1.
Lemna minor is able to reduce nitrate in the dark when the nutrient medium contains yeast extract and glucose in addition to minerals salts.
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2.
When organic N is offered as a source of N in addition to nitrate, the former is assimilated preferentially, but both assimilation processes take place simultaneously.
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3.
Assimilation of nitrate in the dark under ecological conditions can be excluded.
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Bornkamm, R. Dunkel-Assimilation von Nitrat bei Lemna minor L.. Planta 92, 50–56 (1970). https://doi.org/10.1007/BF00385562
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DOI: https://doi.org/10.1007/BF00385562