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  • Title: The effect of thiosulphate and other inhibitors of autotrophic nitrification on heterotrophic nitrifiers.
    Author: Robertson LA, Cornelisse R, Zeng R, Kuenen JG.
    Journal: Antonie Van Leeuwenhoek; 1989 Nov; 56(4):301-9. PubMed ID: 2515797.
    Abstract:
    It has been found that heterotrophic nitrification by Thiosphaera pantotropha can be inhibited by thiosulphate in batch and chemostat cultures. Allythiourea and nitrapyrin, both classically considered to be specific inhibitors of autotrophic nitrification, inhibited nitrification by Tsa. pantotropha in short-term experiments with resting cell suspensions. Hydroxylamine inhibited ammonia oxidation in chemostat cultures, but was itself fully oxidized. Thus the total nitrification rate for the culture remained the same. Heterotrophic nitrification by another organism, a strain of "Pseudomonas denitrificans" has also been shown to be inhibited by thiosulphate in short term experiments and in the chemostat. During these experiments it became evident that this strain is able to grow mixotrophically (with acetate) and autotrophically in a chemostat with thiosulphate as the energy source.
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