The Effect of Paraquat and Hypothermia on Norflurason-Resistant Mutants of Arabidopsis thaliana and Derived Cell Cultures

The Effect of Paraquat and Hypothermia on Norflurason-Resistant Mutants of Arabidopsis thaliana... A tolerance to paraquat (PQ) of plants and cell cultures of Arabidopsis thaliana mutants, nfz18 and nfz24, obtained by chemical mutagenesis and selected by their tolerance to norflurason was demonstrated. This tolerance to PQ was manifested in less active peroxidation of lipids (POL), which was assessed by the content of thiobarbituric acid-reactive substances, and in a less degree of plant and callus damages, which was accompanied by a higher activity of superoxide dismutase and other antioxidant enzymes. A capability of norflurason-tolerant mutants to cross-adaptation toward PQ and activation of antioxidant enzymes indicate a genetically determined activation of the antioxidant systems, resulting in improved mutant tolerance to these inducers of oxidative stress. The nfz24 mutant was much more sensitive to hypothermia than wild-type plants and nfz18 mutants, which was expressed in a higher level of POL in plants and calluses and in a more rapid decrease in the suspension cell viability of this mutant. A similarity in the responses of plants and derived heterotrophic cultures to PQ and hypothermia indicates that, in these A. thaliana mutants, adaptation to these types of stresses occurs mainly at the cellular level. Possible reasons of increased sensitivity to hypothermia of the nfz24 mutant, which was more tolerant to the inducers of oxidative stress, PQ and norflurason, are discussed. Russian Journal of Plant Physiology Springer Journals

The Effect of Paraquat and Hypothermia on Norflurason-Resistant Mutants of Arabidopsis thaliana and Derived Cell Cultures

Loading next page...
Copyright © 2005 by MAIK “Nauka/Interperiodica”
Life Sciences; Plant Sciences; Plant Physiology
Publisher site
See Article on Publisher Site


You’re reading a free preview. Subscribe to read the entire article.

DeepDyve is your
personal research library

It’s your single place to instantly
discover and read the research
that matters to you.

Enjoy affordable access to
over 12 million articles from more than
10,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Unlimited reading

Read as many articles as you need. Full articles with original layout, charts and figures. Read online, from anywhere.

Stay up to date

Keep up with your field with Personalized Recommendations and Follow Journals to get automatic updates.

Organize your research

It’s easy to organize your research with our built-in tools.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.

All the latest content is available, no embargo periods.

See the journals in your area

Monthly Plan

  • Read unlimited articles
  • Personalized recommendations
  • No expiration
  • Print 20 pages per month
  • 20% off on PDF purchases
  • Organize your research
  • Get updates on your journals and topic searches


Start Free Trial

14-day Free Trial

Best Deal — 39% off

Annual Plan

  • All the features of the Professional Plan, but for 39% off!
  • Billed annually
  • No expiration
  • For the normal price of 10 articles elsewhere, you get one full year of unlimited access to articles.



billed annually
Start Free Trial

14-day Free Trial