Regulation of Water Permeability of Vacuolar Symplast

Regulation of Water Permeability of Vacuolar Symplast Effect of exogenous ABA and an inhibitor of energy metabolism NaN3 on water permeability of the desmotubules and tonoplast as the structural elements of vacuolar symplast ensuring water permeability of this transport system was investigated. The methodological approach based on the use of NMR with magnetic field pulse gradient is described in detail. It was shown that ABA affects water permeability of the vacuolar symplast in the root cells of maize (Zea mays L.) seedlings by temporary increase in water permeability of its membrane (tonoplast) and does not modify water permeability of desmotubules. At the same time, the effect of sodium azide is related to the disturbance of water permeability in the latter, and this evidence is corroborated by the additivity in the effects of the two above-mentioned agents on diffusion decay of spin echo produced by vacuolar symplast water molecules. ABA effect was detected only at high exogenous concentrations (10−4 M). The effect of ABA on water permeability of the tonoplast did not depend on or was weakly related to intracellular concentration of ATP, whereas the open state of desmotubules was ATP-dependent. Observations were made on the role of aquaporins in the ABA influence on tonoplast water permeability and the physiological role of high ABA concentrations. Russian Journal of Plant Physiology Springer Journals

Regulation of Water Permeability of Vacuolar Symplast

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