Activation of Ferredoxin-NADP+Oxidoreductase in Vicia fabaLeaves Induced by a Short-Term Increase in Irradiance

Activation of Ferredoxin-NADP+Oxidoreductase in Vicia fabaLeaves Induced by a Short-Term Increase... The effect of a short-term increase in growth irradiance (I) by 1.5–5 times on the rate of the photosynthetic electron transport and the activity of ferredoxin-NADP+oxidoreductase (FNR) in the leaves of broadbean (Vicia fabaL.) plants grown under an irradiance of 8 W/m2was studied. NADPH-diaphorase and cytochrome creductase activities of FNR were determined in isolated chloroplasts and leaf homogenates. The duration of the plant exposure to a higher I varied from 1–30 min to 2 or 24 h. The rate of noncyclic electron transport from water to NADP+and the NADPH-diaphorase activity of FNR increased significantly 15 min after a twofold increase in the I. FNR activation was also found after a short-term (1 min) increase in growth I by 1.5 times. The degree of light-induced activation of FNR was dependent on the light intensity, the duration of plant exposure, and the leaf age. The activation of FNR induced by a short-term increase in the I was reversible. However, inactivation of FNR proceeded more slowly than its light-induced activation. Thus, a relatively small change in the I was sufficient to induce the adaptive response of the photosynthetic apparatus at the level of the electron-transport chain. The results obtained confirm a conclusion made previously that a rapid activation of FNR induced by an increase in the I occurs in the absence of de novoprotein synthesis. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Plant Physiology Springer Journals

Activation of Ferredoxin-NADP+Oxidoreductase in Vicia fabaLeaves Induced by a Short-Term Increase in Irradiance

Loading next page...
 
/lp/springer_journal/activation-of-ferredoxin-nadp-oxidoreductase-in-vicia-fabaleaves-unbWgx94VU
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:1016799701081
Publisher site
See Article on Publisher Site

Abstract

The effect of a short-term increase in growth irradiance (I) by 1.5–5 times on the rate of the photosynthetic electron transport and the activity of ferredoxin-NADP+oxidoreductase (FNR) in the leaves of broadbean (Vicia fabaL.) plants grown under an irradiance of 8 W/m2was studied. NADPH-diaphorase and cytochrome creductase activities of FNR were determined in isolated chloroplasts and leaf homogenates. The duration of the plant exposure to a higher I varied from 1–30 min to 2 or 24 h. The rate of noncyclic electron transport from water to NADP+and the NADPH-diaphorase activity of FNR increased significantly 15 min after a twofold increase in the I. FNR activation was also found after a short-term (1 min) increase in growth I by 1.5 times. The degree of light-induced activation of FNR was dependent on the light intensity, the duration of plant exposure, and the leaf age. The activation of FNR induced by a short-term increase in the I was reversible. However, inactivation of FNR proceeded more slowly than its light-induced activation. Thus, a relatively small change in the I was sufficient to induce the adaptive response of the photosynthetic apparatus at the level of the electron-transport chain. The results obtained confirm a conclusion made previously that a rapid activation of FNR induced by an increase in the I occurs in the absence of de novoprotein synthesis.

Journal

Russian Journal of Plant PhysiologySpringer Journals

Published: Oct 10, 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 18 million articles from more than
15,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Search

Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly

Organize

Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.

Access

Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.

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