Germination of dormant seeds of Stylosanthes humilis as affected by organic acids
Several organic acids (25 mol m−3) at pH 3.0 stimulated the germination of scarified dormant seeds of Townsville stylo (Stylosanthes humilis H.B.K.), an annual tropical forage legume. Germination caused by those acids at pH 7.0, on the order hand, was low. Di- and tricarboxylic and inorganic acids were much more effective in stimulating germination than monocarboxylic acids. Provided the undissociated forms (pH 3.0) of the organic acids were not toxic, they allowed germination to occur. Inhibitors of ethylene biosynthesis decreased germination of low pH-stimulated dormant seeds. The acid-stimulated seeds exhibited also a higher ethylene production than the non-stimulated ones.
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Document Type: Research Article
Publication date: April 1, 2005
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