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KMID : 0903519900330020129
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Journal of the Korean Society of Agricultural Chemistry and Biotechnology
1990 Volume.33 No. 2 p.129 ~ p.132
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Involvement of hydrogen peroxide in the regulation of IAA level in plants
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Abstract
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The role of hydrogen peroxide which is accumulated in plants under low temperature has been studied with respect to the regulation of physiological IAA level. At 10 mM of H₂O₂, accelerating effects of IAA on the elongation of Avena coleoptiles and the root initiation of pea cuttings have bean greatly inhibited. These inhibitions were reversed by introduction of catalase. The reaction of free IAA with Salkowski reagent was inhibited in the presence of H₂O₂, but that of IAA-glutamic acid was not, suggesting the inactivation of free IAA by H₂O₂. The data support that increase in the content of hydrogen peroxide under low temperature partially down-regulates the available IAA through inactivation of IAA.
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KEYWORD
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