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. 1979 Dec;64(6):1094–1098. doi: 10.1104/pp.64.6.1094

Rapid Growth Responses of Avena Coleoptile Segments to Lanthanum and Other Cations

Kenneth H Harmet 1
PMCID: PMC543198  PMID: 16661099

Abstract

The rapid growth responses of oat (var. Victory) coleoptile segments treated with millimolar concentrations of the chlorides of La3+, Ca2+, K+, and NH4+, respectively, have been measured. La3+ and Ca2+ initially depressed the endogenous elongation rate. In the case of La3+ a prolonged stimulatory effect on the rate of elongation was produced by concentrations of 50 millimolar down to 20 micromolar after an initial depression of elongation rate. The effect of K+ was slightly stimulatory and showed a synergistic effect in combination with La3+. NH4+ produced an immediate rapid increase in elongation rate. La3+ did not behave as a “super calcium” in its action upon the spontaneous growth response. The prolonged elongation of the La3+-treated segments exhibiting the spontaneous growth response is apparently a newly observed effect. These rapid growth responses are interpreted as an interaction between anionic lipid-protein complexes in the plasmalemma and the respective ions.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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