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Studies with 4,6-Dioxoheptanoic Acid on Etiolated and Greening Barley Leaves
Erna Meller and Merrill L. Gassman
Vol. 67, No. 6 (Jun., 1981), pp. 1065-1068
Published by: American Society of Plant Biologists (ASPB)
Stable URL: http://www.jstor.org/stable/4266791
Page Count: 4
You can always find the topics here!Topics: Barley, Leaves, Plants, Metabolism, Pyrroles, Biosynthesis, Kinetics, Greening, Chlorophylls, Irradiation
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4,6-Dioxoheptanoic acid (DA), an inhibitor of 5-aminolevulinic acid (ALA) dehydratase (EC 184.108.40.206), 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.
Plant Physiology © 1981 American Society of Plant Biologists (ASPB)