Oxidation of Various Substrates by Mitochondria as Related to the Concentration of Osmotics in the Medium

Oxidation of Various Substrates by Mitochondria as Related to the Concentration of Osmotics in... Wheat (Triticum aestivumL.) root mitochondria were used to investigate the effect of solute concentration in the medium on the rates of succinate, malate, α-ketoglutarate, and glutamate oxidation; the corresponding values of the apparent Michaelis constant (K M); and the changes in the organelle volumes. The oxidation rates and the K M values for all substrates were lower in the 0.5 M sucrose solution than in the 0.3 M solution. Under high osmotic concentration, mitochondria did not shrink. On the contrary, in the absence of the substrate, mitochondria swelled more in the 0.5 M sucrose solution than in the 0.3 M solution. This effect was absent when the substrate was added. The authors conclude that the decrease in the oxidation rate imposed by sucrose was not related to the hindered influx of substrates caused by matrix contraction. Rather, the osmotic effect of sucrose is related to the changes in the structure of mitochondrial enzyme complexes. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Plant Physiology Springer Journals

Oxidation of Various Substrates by Mitochondria as Related to the Concentration of Osmotics in the Medium

Loading next page...
 
/lp/springer_journal/oxidation-of-various-substrates-by-mitochondria-as-related-to-the-p5BeazyQF5
Publisher
Kluwer Academic Publishers-Plenum Publishers
Copyright
Copyright © 2001 by MAIK “Nauka/Interperiodica”
Subject
Life Sciences; Plant Sciences
ISSN
1021-4437
eISSN
1608-3407
D.O.I.
10.1023/A:1009046530594
Publisher site
See Article on Publisher Site

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

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

$49/month

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.

$588

$360/year

billed annually
Start Free Trial

14-day Free Trial