Plant Physiol. Drug Metab Dispos
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Plant Physiology 66:922-924 (1980)
© 1980 American Society of Plant Biologists

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Articles

Biochemistry of Fern Spore Germination

GLYOXYLATE AND GLYCOLATE CYCLE ACTIVITY IN ONOCLEA SENSIBILIS L. 1

Augustus E. Demaggio2 and Carolyn Greene

David Stetler

Department of Biological Sciences, Dartmouth College, Hanover, New Hampshire 03755, Department of Biology, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24060

In chlorophyll-containing spores of Onoclea sensibilis, depletion of lipid reserves during germination is correlated with increases in the activity of the glyoxylate cycle enzymes isocitrate lyase and malate synthase. In Onoclea, the heterotrophic activity associated with lipid catabolism occurs at the same time that autotrophic activity is taking place. Increases in chlorophyll content and in the activity of glycolate oxidase were recorded during the earliest stages of spore germination. In this species, there is no temporal separation of heterotrophic and autotrophic reactions. Concurrent increases in glyoxylate and glycolate cycle activities appear to occur naturally.

2 Part of this study was completed while A.E.D. was a Visiting Professor of Biology at Virginia Polytechnic Institute and State University. The support and facilities provided are gratefully acknowledged.

1 This work was supported in part by the Research Committee, Dartmouth College.






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Copyright © 1980 by the American Society of Plant Biologists