Endogenous Auxin and Ethylene in Pellia (Bryophyta)

  • Thomas R
  • Harrison M
  • Taylor J
  • et al.
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Abstract

The occurrence of endogenous indole-3-acetic acid and ethylene in bryophyte tissue was tentatively demonstrated using gas chromatography, high performance liquid chromatography, and double-standard isotope dilution techniques. Rapidly elongating stalks (or setae) of Pellia epiphylla (L.) Corda sporophytes contain approximately 2.5 to 2.9 micrograms per gram fresh weight of putative free IAA. Ethylene released by setae increases during growth from 0.027 to 0.035 nanoliter per seta per hour. Application of 5 microliters per liter ethylene inhibits auxin-stimulated elongation growth of this tissue, a result which suggests that both endogenously produced compounds act in tandem as natural growth modulators.

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Thomas, R. J., Harrison, M. A., Taylor, J., & Kaufman, P. B. (1983). Endogenous Auxin and Ethylene in Pellia (Bryophyta). Plant Physiology, 73(2), 395–397. https://doi.org/10.1104/pp.73.2.395

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