Root and Nodule Respiration in Relation to Acetylene Reduction in Intact Nodulated Peas

Root and Nodule Respiration in Relation to Acetylene Reduction in Intact Nodulated Peas Inoculated pea plants ( Pisum sativum L.) were grown with N-free nutrients in a controlled environment room and rates of respiratory CO 2 evolution and C 2 H 2 reduction by the intact nodulated roots were determined. Experiments followed changes related to diurnal cycles, light and dark treatments, partial defoliation, aging of plants and NH 4 NO 3 addition. In all experiments, changes in C 2 H 2 reduction were associated with parallel changes in the respiration rate, although in all but the defoliation experiment there was a basal level of respiration which was independent of the rate of C 2 H 2 reduction. In conditions which affected growth or plant size as well as C 2 H 2 reduction, respiration changed by an average of 0.42 mg CO 2 (μmol C 2 H 2 reduced) −1 . However, some treatments decreased C 2 H 2 reduction without greatly changing the growth and in these conditions respiration was decreased by an average of 0.27 mg CO 2 (μmol C 2 H 2 reduced) −1 . While this value may also include some respiration associated with other processes, it is proposed that it more closely estimates respiration directly associated with energy utilization for acetylene reduction; whereas the higher value includes respiration related to maintenance and growth processes as well. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png

Root and Nodule Respiration in Relation to Acetylene Reduction in Intact Nodulated Peas

Dec 1, 1977

Loading next page...
 
/lp/american-society-of-plant-biologist/root-and-nodule-respiration-in-relation-to-acetylene-reduction-in-mjK3L1Xcst
Publisher
American Society of Plant Biologist
Copyright
Copyright © 1977 by the American Society of Plant Biologists
ISSN
1532-2548
eISSN
0032-0889
DOI
10.1104/pp.60.6.812
Publisher site
See Article on Publisher Site

Abstract

Inoculated pea plants ( Pisum sativum L.) were grown with N-free nutrients in a controlled environment room and rates of respiratory CO 2 evolution and C 2 H 2 reduction by the intact nodulated roots were determined. Experiments followed changes related to diurnal cycles, light and dark treatments, partial defoliation, aging of plants and NH 4 NO 3 addition. In all experiments, changes in C 2 H 2 reduction were associated with parallel changes in the respiration rate, although in all but the defoliation experiment there was a basal level of respiration which was independent of the rate of C 2 H 2 reduction. In conditions which affected growth or plant size as well as C 2 H 2 reduction, respiration changed by an average of 0.42 mg CO 2 (μmol C 2 H 2 reduced) −1 . However, some treatments decreased C 2 H 2 reduction without greatly changing the growth and in these conditions respiration was decreased by an average of 0.27 mg CO 2 (μmol C 2 H 2 reduced) −1 . While this value may also include some respiration associated with other processes, it is proposed that it more closely estimates respiration directly associated with energy utilization for acetylene reduction; whereas the higher value includes respiration related to maintenance and growth processes as well.

There are no references for this article.

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, 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 folders to
organize your research

Export folders, citations

Read DeepDyve articles

Abstract access only

Unlimited access to over
18 million full-text articles

Print

20 pages / month

PDF Discount

20% off