2,4‐D‐Induced Changes in the K+ Uptake of Wheat Roots at Different pH Values

FERENC ZSOLDOS, BÉLA KARVALY, ILDIKÓ TÓTH, L. Erdei

Research output: Contribution to journalArticle

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Abstract

The effects of an auxin herbicide, 2,4‐D, at a concentration of 0.01 mM, on the K+ uptake and efflux of excised roots of wheat (Triticum aestivum L. cv. Rannaya) were investigated at different pH values. The K+ movement was monitored with a K+ (86Rb) tracer. In parallel experiments the ATPase activities of microsomal fractions were determined by the inorganic phosphate liberation method. 2,4‐D inhibited the K+ uptake especially at low pH, irrespective of whether Ca2+ was present or not. No marked changes were observed in the K+ efflux properties at pH values above 4. The inhibitory effect on K+ uptake exhibited a correlation with the hydrocarbon solubility of the herbicide, but not with the 2,4‐D‐induced decrease of the ATPase activity. It is suggested that 2,4‐D exerts a non‐specific effect on the lipid‐protein interactions, giving rise to a generalized alteration of the transport barrier properties of the plasma membrane even at as low a concentration as 0.01 mM.

Original languageEnglish
Pages (from-to)395-399
Number of pages5
JournalPhysiologia Plantarum
Volume44
Issue number4
DOIs
Publication statusPublished - 1978

Fingerprint

Triticum
Herbicides
wheat
adenosinetriphosphatase
Adenosine Triphosphatases
herbicides
Indoleacetic Acids
Hydrocarbons
Solubility
hydrocarbons
solubility
tracer techniques
auxins
plasma membrane
Triticum aestivum
Phosphates
Cell Membrane
phosphates
calcium
methodology

ASJC Scopus subject areas

  • Physiology
  • Genetics
  • Plant Science
  • Cell Biology

Cite this

2,4‐D‐Induced Changes in the K+ Uptake of Wheat Roots at Different pH Values. / ZSOLDOS, FERENC; KARVALY, BÉLA; TÓTH, ILDIKÓ; Erdei, L.

In: Physiologia Plantarum, Vol. 44, No. 4, 1978, p. 395-399.

Research output: Contribution to journalArticle

ZSOLDOS, FERENC ; KARVALY, BÉLA ; TÓTH, ILDIKÓ ; Erdei, L. / 2,4‐D‐Induced Changes in the K+ Uptake of Wheat Roots at Different pH Values. In: Physiologia Plantarum. 1978 ; Vol. 44, No. 4. pp. 395-399.
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