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KMID : 0613820100200050745
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Journal of Life Science
2010 Volume.20 No. 5 p.745 ~ p.749
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Effect of Benzyladenine on the IAA-Induced Ethylene Production in the Primary Roots of Maize
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Song Seong-Hee
Park Ji-Hye
Kim Soon-Young
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Abstract
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This study was conducted to examine the effect of cytokinin (N?-benzyladenine; BA) and/or an IAA on ethylene production of maize (Zea mays) primary roots. When the two hormones were applied exogenously, both hormones synergistically increased ethylene production, which was greater than the sum of the level of each hormone"s effect. For example, the ethylene production was stimulated between about 87% and 170% of the control by 10?⁴ M BA with 10?⁴ M IAA for 8 hours respectively, whereas the ethylene production was increased by about 480% of the control when the two hormones were treated simultaneously. Such a synergistic effect was also found in changes in the activity and gene expression level of ACC synthase. However, in the case of ACC oxidase did not show any observable effects. Based on our results, it is possible to conclude that BA and IAA stimulated the ethylene production synergistically by affecting the ACC synthase in maize roots.
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KEYWORD
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Cytokinin, IAA, ethylene production, maize roots
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