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Humic acids. XI. The effect on germination of cereals of thymohydroquinone as model substance of pre-humic acids or decomposition products of humic acid.



Humic acids. XI. The effect on germination of cereals of thymohydroquinone as model substance of pre-humic acids or decomposition products of humic acid.



Z. PflErnahr. Dung, 7I: 215-224



Aqueous thymohydroquinone applied at concentrations of 0.0025-0.000025% stimulated germination of cereal seeds, while 0.025% suppressed germination. The same effects were obtained with thymoquinone or isatin, both of which may be regarded as dehydrase model-substances.

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