The strategy of Na+ compartmentation and growth of Atriplex centralasiatica in adaptation to saline environments

The strategy of Na+ compartmentation and growth of Atriplex centralasiatica in adaptation to... In this study, we investigated the adaptation strategy employed by Atriplex centralasiatica Iljin in response to high salinity. When grown in high saline environments (100–200 mM NaCl), A. centralasiatica plants were larger and more succulent. This increased growth and water uptake was correlated with a large and specific cellular accumulation of sodium, demonstrating that in A. centralasiatica Na+ is beneficial rather than toxic. More than 95% of Na+ absorbed by salt-treated A. centralasiatica plants accumulated in shoots, especially in leaves; approximately 98% of Na+ that accumulated in leaves was localized in leaf protoplasts, a situation that was responsible for the decreased photosynthetic rate observed with increasing salt concentration. Because of the greater leaf area per plant found under saline conditions, no reduction in biomass of individual plants was observed. Measurements on isolated tonoplast-enriched membrane vesicles derived from the leaves of A. centralasiatica revealed increased V-H+-ATPase hydrolytic activity and V-H+-ATPase proton pump activity in salt-treated leaves compared with controls. These results suggest that, as an adaptation to saline environments, A. centralasiatica can efficiently sequester Na+ into vacuoles, thereby increasing leaf area to maintain its CO2 assimilation capabilities. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Plant Physiology Springer Journals

The strategy of Na+ compartmentation and growth of Atriplex centralasiatica in adaptation to saline environments

Loading next page...
 
/lp/springer_journal/the-strategy-of-na-compartmentation-and-growth-of-atriplex-kKN7q5rSNx
Publisher
Springer US
Copyright
Copyright © 2014 by Pleiades Publishing, Ltd.
Subject
Life Sciences; Plant Physiology; Plant Sciences
ISSN
1021-4437
eISSN
1608-3407
D.O.I.
10.1134/S1021443714020113
Publisher site
See Article on Publisher Site

Abstract

In this study, we investigated the adaptation strategy employed by Atriplex centralasiatica Iljin in response to high salinity. When grown in high saline environments (100–200 mM NaCl), A. centralasiatica plants were larger and more succulent. This increased growth and water uptake was correlated with a large and specific cellular accumulation of sodium, demonstrating that in A. centralasiatica Na+ is beneficial rather than toxic. More than 95% of Na+ absorbed by salt-treated A. centralasiatica plants accumulated in shoots, especially in leaves; approximately 98% of Na+ that accumulated in leaves was localized in leaf protoplasts, a situation that was responsible for the decreased photosynthetic rate observed with increasing salt concentration. Because of the greater leaf area per plant found under saline conditions, no reduction in biomass of individual plants was observed. Measurements on isolated tonoplast-enriched membrane vesicles derived from the leaves of A. centralasiatica revealed increased V-H+-ATPase hydrolytic activity and V-H+-ATPase proton pump activity in salt-treated leaves compared with controls. These results suggest that, as an adaptation to saline environments, A. centralasiatica can efficiently sequester Na+ into vacuoles, thereby increasing leaf area to maintain its CO2 assimilation capabilities.

Journal

Russian Journal of Plant PhysiologySpringer Journals

Published: Mar 7, 2014

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