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Some effects of humic acid on two different biological systems

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Summary

Humic acid, and the water-and acid-extracted residue fractions obtained from it, stimulated the development of invertase activity in beet disks during aging. Those fractions which showed most effect on invertase development also caused the greatest numbers of sporangia to be formed on several species of the Actinoplanaceae (Actinomycetales) cultured on agar with incorporated humic acid. The results are discussed in relation to an ‘aromatic core’ present in the humic acid.

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Authors and Affiliations

  1. Macaulay Institute for Soil Research, Craigiebuckler, AB9 2QJ, Aberdeen

    D. Vaughan & L. G. Willoughby

  2. Freshwater Biological Association, Far Sawrey, Ambleside, LA22 OLP, Westmorland

    C. D. Baker

Authors
  1. D. Vaughan
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  2. C. D. Baker
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  3. L. G. Willoughby
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Vaughan, D., Baker, C.D. & Willoughby, L.G. Some effects of humic acid on two different biological systems. Plant Soil 40, 429–434 (1974). https://doi.org/10.1007/BF00011528

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  • DOI: https://doi.org/10.1007/BF00011528

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