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Relationship between the activity of the succinoxidase system and the rate of oxygen consumption during the embryonic development of the mealworm, Tenebrio molitor Linnaeus.
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MedLine Citation:
PMID:  13242759     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
1. Readings were made on the rates of oxygen consumption and on the activities of the succinoxidase system of eggs of the mealworm for each day of embryonic development at 30 degrees C. 2. The rate of oxygen consumption, expressed as microliters/50 eggs/hour, was low (4.89) in newly laid eggs. It rose to 7.41 during the next 24 hours, remained at this level for the next 2 days, and then increased during the remainder of the embryonic period reaching a high value of 14.79 at the time of hatching. 3. The activity of cytochrome oxidase in eggs from newly emerged beetles, expressed as Delta log [Cy Fe(++)]/minute, remained at a value of 0.042 during the first half of the embryonic period, increasing to 0.233 during the latter half of this period. 4. The activity of succinic dehydrogenase showed the same series of changes except at much lower values. Expressed as Delta log [Cy Fe(+++)]/minute, they ranged from 0.010 in the newly laid egg to 0.034 at the end of the embryonic period. 5. The activity of cytochrome oxidase of the egg was found to decrease with parental age. Eggs from newly emerged beetles had activity values considerably higher than those of beetles 6 or 8 weeks after emergence. However, no comparable changes were noted in the activity of succinic dehydrogenase or in the rate of oxygen consumption. These observations suggest that cytochrome oxidase is not a rate-limiting enzyme in the respiratory metabolism of the mealworm egg.
Authors:
D LUDWIG; M C BARSA
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The Journal of general physiology     Volume:  38     ISSN:  0022-1295     ISO Abbreviation:  J. Gen. Physiol.     Publication Date:  1955 Jul 
Date Detail:
Created Date:  1955-12-01     Completed Date:  2003-05-01     Revised Date:  2010-06-22    
Medline Journal Info:
Nlm Unique ID:  2985110R     Medline TA:  J Gen Physiol     Country:  Not Available    
Other Details:
Languages:  eng     Pagination:  729-34     Citation Subset:  OM    
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MeSH Terms
Descriptor/Qualifier:
Metabolism*
Oxidoreductases*
Chemical
Reg. No./Substance:
EC 1.-/Oxidoreductases
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Full Text
Journal Information
Journal ID (nlm-ta): J Gen Physiol
ISSN: 0022-1295
ISSN: 1540-7748
Publisher: The Rockefeller University Press
Article Information
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Copyright © Copyright, 1955, by The Rockefeller Institute for Medical Research
Received Day: 7 Month: 2 Year: 1955
Print publication date: Day: 20 Month: 7 Year: 1955
Volume: 38 Issue: 6
First Page: 729 Last Page: 734
ID: 2147509
PubMed Id: 13242759

RELATIONSHIP BETWEEN THE ACTIVITY OF THE SUCCINOXIDASE SYSTEM AND THE RATE OF OXYGEN CONSUMPTION DURING THE EMBRYONIC DEVELOPMENT OF THE MEALWORM, TENEBRIO MOLITOR LINNAEUS
Daniel Ludwig
Mary C. Barsa
From the Department of Biology, Fordham University, New York


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