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Metabolism of Food Reserves in Germinating Velvetleaf

Published online by Cambridge University Press:  12 June 2017

J. A. Mulliken ,
C. A. Kust  and
L. E. Schrader
J. A. Mulliken
Affiliation:
Department of Agronomy, University of Wisconsin, Madison, Department of Biology, Texas A & M University, College Station, Texas
C. A. Kust
Affiliation:
, University of Wisconsin, Madison
L. E. Schrader
Affiliation:
, University of Wisconsin, Madison
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Abstract

Endosperm dry weight, protein, and fat losses accompanied rapid radicle growth of velvetleaf (Abutilon theophrasti Medic.) between 12 and 36 hr of germination at 31 C. Cotyledonary reserves were mobilized after 36 hr. Isocitrate lyase activity sedimented with a particulate fraction in varying degrees, but maximal activity developed at times coincident with fat mobilization. Respiration of excised endosperms reached maximal rates shortly after radicle emergence. The actions of hydrogen cyanide, carbon monoxide, and 2,4-dinitrolphenol indicated that respiration of endosperms excised from imbibed and germinated seed was due to cytochrome oxidase activity, and was coupled to phosphorylation.

Type
Research Article
Information
Weed Science , Volume 18 , Issue 5 , September 1970 , pp. 565 - 571
Copyright
Copyright © Weed Science Society of America 

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