Hydrogen Peroxide Appears to Mediate a Decrease in Hydraulic Conductivity in Wheat Roots under Salt Stress

Hydrogen Peroxide Appears to Mediate a Decrease in Hydraulic Conductivity in Wheat Roots under... Changes in the root diameter were measured in wheat, Triticum aestivum L., using a sensor of small displacements in “osmotic experiments,” and the hydraulic conductivity (L p) of the root was calculated by the method of initial flows. The L p decreased by two to three times during 30-min exposure in 0.1–9 mM H2O2. In 150 mM NaCl, changes in L p exhibited two-phase kinetics: an initial increase in L p by two and a half to three times, followed by a decrease to 1.6–50% of the control level within the subsequent 24 h. After one-day-long exposure of the roots in a solution containing 150 mM NaCl and 100 mg/l catalase, L p did not differ from the control level. Root pretreatment with salicylate, which promotes the formation of H2O2, prevented the initial increase in L p in 150 mM NaCl, probably, due to a drastic L p decrease. The activity of guaiacol peroxidase in the roots increased by three times within the 20-min exposure of the roots to the salt solution. The data suggest that hydrogen peroxide can mediate the L p decrease during the first day of salinity stress. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Plant Physiology Springer Journals

Hydrogen Peroxide Appears to Mediate a Decrease in Hydraulic Conductivity in Wheat Roots under Salt Stress

Loading next page...
 
/lp/springer_journal/hydrogen-peroxide-appears-to-mediate-a-decrease-in-hydraulic-lVA6rekKpI
Publisher
Kluwer Academic Publishers-Plenum Publishers
Copyright
Copyright © 2002 by MAIK “Nauka/Interperiodica”
Subject
Life Sciences; Plant Sciences
ISSN
1021-4437
eISSN
1608-3407
D.O.I.
10.1023/A:1015549220405
Publisher site
See Article on Publisher Site

Abstract

Changes in the root diameter were measured in wheat, Triticum aestivum L., using a sensor of small displacements in “osmotic experiments,” and the hydraulic conductivity (L p) of the root was calculated by the method of initial flows. The L p decreased by two to three times during 30-min exposure in 0.1–9 mM H2O2. In 150 mM NaCl, changes in L p exhibited two-phase kinetics: an initial increase in L p by two and a half to three times, followed by a decrease to 1.6–50% of the control level within the subsequent 24 h. After one-day-long exposure of the roots in a solution containing 150 mM NaCl and 100 mg/l catalase, L p did not differ from the control level. Root pretreatment with salicylate, which promotes the formation of H2O2, prevented the initial increase in L p in 150 mM NaCl, probably, due to a drastic L p decrease. The activity of guaiacol peroxidase in the roots increased by three times within the 20-min exposure of the roots to the salt solution. The data suggest that hydrogen peroxide can mediate the L p decrease during the first day of salinity stress.

Journal

Russian Journal of Plant PhysiologySpringer Journals

Published: Oct 13, 2004

References

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

DeepDyve Freelancer

DeepDyve Pro

Price
FREE
$49/month

$360/year
Save searches from
Google Scholar,
PubMed
Create lists to
organize your research
Export lists, citations
Read DeepDyve articles
Abstract access only
Unlimited access to over
18 million full-text articles
Print
20 pages/month
PDF Discount
20% off