Inhibition of chlorophyll synthesis inHordeum vulgare by 3-amino 2,3-dihydrobenzoic acid (gabaculin) |
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Authors: | Corinne M Hill Sharon A Pearson Arnold J Smith Lyndon J Rogers |
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Institution: | (1) Department of Biochemistry and Agricultural Biochemistry, The University College of Wales, SY23 3DD Aberystwyth, Dyfed, UK |
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Abstract: | Gabaculin (3-amino 2,3-dihydrobenzoic acid) is shown to be a very potent inhibitor of chlorophyll formation inHordeum vulgate. Exposure of leaf segments to 30/M gabaculin results in an 80% inhibition of chlorophyll synthesis, and this is paralleled by a decrease in carotenoid. Dual-inhibitor studies with dioxoheptanoic acid, which is an inhibitor of inolaevulinic acid dehydratase, show that gabaculin inhibits an earlier step than dioxoheptanoic acid and affects -aminolaevulinic acid synthesis rather than its subsequent metabolism. |
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