Plant Physiol. Journal of Pharmacology and Experimental Therapeutics
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Plant Physiology 67:1065-1068 (1981)
© 1981 American Society of Plant Biologists

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Articles

Studies with 4,6-Dioxoheptanoic Acid on Etiolated and Greening Barley Leaves 1

Erna Meller and Merrill L. Gassman2

Department of Biological Sciences, University of Illinois at Chicago Circle, Chicago, IL 60680

4,6-Dioxoheptanoic acid (DA), an inhibitor of 5-aminolevulinic acid (ALA) dehydratase (EC 4.3.1.24), causes ALA to accumulate at the expense of chlorophyll when applied to greening leaves of Hordeum vulgare L. var. Larker. Preincubating etiolated leaves with DA in darkness eliminates the lag phase in ALA accumulation during a subsequent exposure to illumination. More than 50% of the DA taken up during a 2-hour incubation disappeared during a subsequent 4-hour incubation. These results suggest that barley leaves can metabolize DA, and the products of this metabolism may enhance the capacity for ALA synthesis.

2 To whom reprint requests should be addressed.

1 This work was supported by National Science Foundation Grant PCM 79-01605 to MLG.






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Copyright © 1981 by the American Society of Plant Biologists