Abstract
Eight isoperoxidases separable by electrophoresis were found in subapical coleoptile sections of oats (Avena sativa L.). Appearance of one isozyme was repressed by auxin applications (IAA or 2,4‐D). A second isozyme was induced by similar treatment. Genetic variability for the hormone inducible isozyme was demonstrated. Hormone level was critical to both isozyme repression and induction.
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