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Russian Journal of Plant Physiology

, Volume 54, Issue 3, pp 381–387 | Cite as

Cytokinin-like growth regulators mitigate toxic action of zinc and nickel ions on maize seedlings

  • A. S. Lukatkin
  • N. V. Gracheva
  • N. N. Grishenkova
  • P. V. Dukhovskis
  • A. A. Brazaitite
Research Papers

Abstract

Maize (Zea mays L.) seedlings grown in water culture in the presence of zinc and nickel ions were used with an effort to alleviate heavy metal toxicity by treating seeds with thidiazuron and kinetin (synthetic growth regulators with cytokinin-like activity). Heavy metals were shown to decrease germinability of seeds, suppress seedling growth, alter membrane permeability, and inhibit the activity of ascorbate peroxidase. Synthetic cytokinin-like agents alleviated deteriorative effects of heavy metals; the extent of alleviation depended on toxicant species and its concentration. The toxic effect of Zn2+ was effectively relieved by kinetin, whereas the Ni2+ toxicity was preferentially alleviated by thidiazuron.

Key words

Zea mays growth characteristics electrolyte leakage ascorbate peroxidase heavy metals zinc nickel thidiazuron kinetin 

Abbreviations

APO

ascorbate peroxidase

HM

heavy metals

ROS

reactive oxygen species

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Copyright information

© Pleiades Publishing, Ltd. 2007

Authors and Affiliations

  • A. S. Lukatkin
    • 1
  • N. V. Gracheva
    • 1
  • N. N. Grishenkova
    • 1
  • P. V. Dukhovskis
    • 2
  • A. A. Brazaitite
    • 2
  1. 1.Department of Botany and Plant Physiology, Faculty of BiologyOgarev Mordovian State UniversitySaranskRussia
  2. 2.Lithuanian Institute of HorticultureBabtaiLithuania

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