Skip to main content
SpringerLink
Log in

Light and the transport and metabolism of indoleacetic acid in normal and albino dwarf pea seedlings

  • Published:
Planta Aims and scope Submit manuscript

Summary

The patterns of transport and metabolism of IAA-2-14C applied to the apices of intact normal and albino dwarf pea seedlings were essentially similar under given light conditions. Light greatly reduced the decarboxylation of the applied IAA and stimulated the synthesis of indoleaspartic acid (IAAsp) in both normal and albino plants.

In light considerably more 14C was exported from the apices of normal than albino plants; this result was attributed to the reduced capacity of the transport system in the latter.

The specific activity of 14C in the stem decreased logarithmically with increasing distance from the treated apex. Light increased the steepness of the logarithmic profile. These results are discussed in relation to the rate of immobilization of IAA along the transport pathway by conversion to IAAsp.

No evidence was found to support a previous suggestion (Pilet and Phipps, 1968) that IAA-oxidase activity and chlorophyll levels were causally linked.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  • Galston, A. W., Baker, R. S.: Studies on the physiology of light action. III. Light activation of a flavoprotein enzyme by reversal of the naturally occurring inhibition. Amer. J. Bot. 38, 190–195 (1951).

    Google Scholar 

  • Goldsmith, M. H. M., Thimann, K. V.: Some characteristics of movement of indoleacetic acid in coleoptiles of Avena. I. Uptake, destruction, immobilization, and distribution of IAA during basipetal translocation. Plant Physiol. 37, 492–505 (1962).

    Google Scholar 

  • Gordon, S. A.: Occurrence, formation and inactivation of auxins. Ann. Rev. Plant Physiol. 5, 341–378 (1954).

    Article  Google Scholar 

  • Hare, R. C.: Indoleacetic acid oxidase. Bot. Rev. 30, 129–165 (1964).

    Google Scholar 

  • Horwitz, L.: Some simplified mathematical treatments of translocation in plants. Plant Physiol. 33, 81–93 (1958).

    Google Scholar 

  • Lantican, B. P., Muir, R. M.: Auxin physiology of dwarfism in Pisum sativum. Physiol. Plant. (Kbh.) 22, 412–423 (1969).

    Google Scholar 

  • Morris, D. A., Briant, R. E., Thomson, P. G.: The transport and metabolism of 14C-labelled indoleacetic acid in intact pea seedlings. Planta (Berl.) 89, 178–197 (1969).

    Google Scholar 

  • Nesling, F. A. V.: The fate of indole-3-acetic acid-2-14C in light-and dark-grown pea seedlings. B. Sc. Diss., University of Southampton (1969).

  • Pilet, P.-E.: Les phytohormones de croissance. Paris: Masson & Cie. 1961.

    Google Scholar 

  • —, Phipps, J.: Inhibition of auxin catabolism in relation to the chlorophyll content of the tissues. Planta (Berl.) 80, 82–88 (1968).

    Google Scholar 

  • Tang, Y. M., Bonner, J.: The enzymic inactivation of indoleacetic acid. II. The physiology of the enzyme. Amer. J. Bot. 35, 570–578 (1948).

    Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Department of Botany, University of Southampton, UK

    D. A. Morris

Authors
  1. D. A. Morris
    View author publications

    You can also search for this author in PubMed Google Scholar

Rights and permissions

Reprints and permissions

About this article

Cite this article

Morris, D.A. Light and the transport and metabolism of indoleacetic acid in normal and albino dwarf pea seedlings. Planta 91, 1–7 (1970). https://doi.org/10.1007/BF00390160

Download citation

  • Received:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF00390160

Keywords

Search

Navigation