Gravi- and Chemotropisms of the Primary Maize Roots when Affected by Lead and Cadmium

Gravi- and Chemotropisms of the Primary Maize Roots when Affected by Lead and Cadmium Gravity-imposed growth orientation was studied in the roots of three-day-old maize seedlings treated for 3 h with 10–5to 10–2-M lead and cadmium nitrate solutions. Cubic agar blocks (1 mm3) containing lead and cadmium nitrate solutions were used to produce unilateral local chemostimulation of roots. Gravistimulation was induced when roots were in the horizontal position or slightly deviated from the initial vertical position at the beginning of chemotropic curvature response. Positive (towards the salt) and negative (away from the salt) chemotropic curvatures were observed most often when meristems of the initially vertical roots were chemostimulated. Negative curvatures were observed most often in response to medium salt concentrations, whereas high concentrations resulted in positive curvatures. Half of the roots with their meristems stimulated by salt solutions still continued growing vertically downward. Most roots exposed to simultaneous gravi- and chemostimulation and exposed to gravistimulation after salt treatment (except at the highest salt concentration) curved downward. It follows that the final growth orientation of these roots depended mostly on gravity. The author concludes that the primary roots of maize seedlings possess high gravitropic and low chemotropic sensitivity. Russian Journal of Plant Physiology Springer Journals

Gravi- and Chemotropisms of the Primary Maize Roots when Affected by Lead and Cadmium

Loading next page...
Kluwer Academic Publishers-Plenum Publishers
Copyright © 2001 by MAIK “Nauka/Interperiodica”
Life Sciences; Plant Sciences
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