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Respiration, RQ and Activities of Three Enzymes during the Transition from the Dormant to the Active State in Western Ironweed

Published online by Cambridge University Press:  12 June 2017

F. S. Davis  and
M. K. McCarty
F. S. Davis
Affiliation:
Crops Research Division, Agricultural Research Service, U. S. Department of Agriculture, College Station, Texas, and Lincoln, Nebraska
M. K. McCarty
Affiliation:
Crops Research Division, Agricultural Research Service, U. S. Department of Agriculture, College Station, Texas, and Lincoln, Nebraska
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Abstract

We developed a technique for obtaining buds which were alike except for the state of dormancy, and measured aerobic respiration and enzyme activities in internally dormant, and active but non-growing, buds of western ironweed (Vernonia baldwini Torr.). In both types of buds respiratory quotient was centered at about 1.2, and slightly higher in the active buds. Respiration rate paralleled specific malic dehydrogenase activity; both were lower in dormant than in active buds. Specific peroxidase and polyphenol oxidase activities did not differ markedly in dormant and in active buds. Respiration rate and all enzyme specific activities increased markedly when active buds were permitted to grow.

Type
Research Article
Information
Weeds , Volume 14 , Issue 1 , January 1966 , pp. 69 - 73
Copyright
Copyright © 1966 Weed Science Society of America 

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References

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