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Recent investigations on plant polyamine oxidase (PAO) are reviewed. The enzyme belongs to a new class of flavoenzymes with similar structural features including, among others, monoamine oxidase. Plant PAOs catalyse the oxidation of the polyamine substrates spermidine and spermine. The reaction...
Endogenous hormone levels (indole-3-acetic acid (IAA), abscisic acid (ABA), gibberellins 1, 3 and 20 (GAs), zeatin/zeatin riboside (Z/ZR) and N 6 (Δ 2 -isopentenyl) adenine/ N 6 (Δ 2 -isopentenyl) adenosine; (iP/iPA)) were analysed in immature maize zygotic embryos of two maize ( Zea mays L.)...
The increase in dry weight during the culture of bean callus cultures was inhibited by the herbicide dichlobenil (2,6-dicholorobenzonitrile) with an I 50 of 0.5 μM. However bean calli became tolerant to a concentration of 12 μM by a stepwise increase in the concentration of the inhibitor in...
We have observed earlier that primary leaf opening in Sorghum is a light-dependent process. We now show that giving a short photo-exposure to the roots alone also induced leaf opening over a similar time scale. However, any injury to the primary root inhibited the leaf formation. To check the...
Axenically grown Ammi majus plantlets were inoculated with seven different Agrobacterium rhizogenes strains. Hairy root lines were established only after inoculation with the two agropine strains: A4 and LBA9402. The growth rate of hairy root cultures was about thirty times faster than that of...
The yellow coloration of snapdragon ( Antirrhinum majus ) flowers is mainly provided by the 6-glucosides of aureusidin and bracteatin. However, the biochemical mechanism of aurone biosynthesis is not well understood. In this study, we have identified aurone-biosynthesizing activity in the...
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