Plant Physiol. Drug Metab Dispos
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Plant Physiology 53:779-781 (1974)
© 1974 American Society of Plant Biologists

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Articles

Rapid Increase in Adenosine 5'-Triphosphate during Early Wheat Embryo Germination 1

Ralph L. Obendorf2 and Abraham Marcus

a The Institute for Cancer Research, Fox Chase Center for Cancer and Medical Sciences, Philadelphia, Pennsylvania 19111

The ATP content of isolated wheat (Triticum aestivum L. var. Polk) embryos increases 5-fold during the first 30 minutes and 10-fold during the first hour of germination to 80% of maximum. The ATP level remains at approximately 800 nanomoles per gram of tissue during the next 15 hours. ADP, AMP, and total adenosine phosphates decrease between 1 and 6.5 hours, while adenylate energy charge increases from 0.6 to 0.8 and remains constant. The rapid increase in ATP during imbibition is consistent with the energy requirement for polyribosome formation and protein synthesis during the first hours of germination. A method for determining nanomole quantities of ATP in tissue extracts by isotopic dilution of {gamma}-32P-ATP in the hexokinase reaction is outlined.

2 On sabbatic leave from the Department of Agronomy, Cornell University, Ithaca, N. Y. 14850.

1 This work was supported by United States Public Health Services Grants GM-15122, CA-06927, and RR-05539 from the National Institutes of Health, by Grant GB-23041 (presently GB-35585X) from the National Science Foundation, and by an appropriation from the Commonwealth of Pennsylvania.




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L.-S. CHEN and A. NOSE
Day-Night Changes of Energy-rich Compounds in Crassulacean Acid Metabolism (CAM) Species Utilizing Hexose and Starch
Ann. Bot., September 1, 2004; 94(3): 449 - 455.
[Abstract] [Full Text] [PDF]


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