biologia plantarum

International journal on Plant Life established by Bohumil Němec in 1959

Biologia plantarum 17:207-213, 1975 | DOI: 10.1007/BF02920836

Indolylacetic acid oxidase in dormant apple embryos

Katarzyna Dziewanowska1, St. Lewak1
1 Institute of Botany, The University of Warsaw, Poland

The IAA oxidase activity was studied during the culture of dormant apple embryos. The effect of different factors on this enzyme activity was investigated either by adding them to the reaction mixture or to the culture medium. Phloridzin was found to be the best phenolic cofactor. The development of IAA oxidase activity was stimulated by phloridzin and GA3. The properties of apple embryos IAA oxidase allow to postulate the presence of two enzyme systems able to oxidize IAA in the material studied. The involvement of peroxidase activity in IAA oxidation was also investigated. The differences in the changes of peroxidase and IAA oxidase activities during the culture of dormant apple embryos do not permit to consider the activity of peroxidases to be identical with that of IAA oxidase.

Received: June 7, 1974; Published: May 1, 1975  Show citation

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Dziewanowska, K., & Lewak, S. (1975). Indolylacetic acid oxidase in dormant apple embryos. Biologia plantarum, 17(3), 207-213. doi: 10.1007/BF02920836
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