Effect of fungal humic-like polymers and their phenolic units on auxin destruction |
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| Authors: | MC Mato |
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| Institution: | Plant Physiology Department, Consejo Superior de Investigaciones Cientificas, Santiago de Compostela, Spain |
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| Abstract: | Humic-like substances synthesized by Aspergillus sydowi, Epicoccum nigrum, Hendersonula toruloidea and Stachyhotrys atra inhibited indoleacetic acid (IAA) destruction by lentil roots extracts. The fungus polymers were similar to soil humic acids with respect to the effect on IAA-oxidase activity. Model polymers prepared using pure phenols reduced the IAA oxidation too. The relationships between the effect of fungal substances on IAA-oxidase activity and their phenolic units content are briefly discussed. |
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