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KMID : 0613820070170081172
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Journal of Life Science
2007 Volume.17 No. 8 p.1172 ~ p.1175
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Promotion of Aldehyde Oxidase Activities by Ethanol in Maize (Zea mays) Roots
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Oh Young-Joo
Park Woong-June
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Abstract
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We observed that exogenously applied ethanol changed the activities of aldehyde oxidases (AO) in the primary roots of maize (Zea mays). The stimulatory effect of ethanol on the aldehyde oxidase activities was concentration dependent; the AO activities were slightly weaker with 0.2 - 0.4% ethanol and stronger with 0.8 - 1.0% ethanol than the level of control. The promotion of AO activities was not explained by the increased transcription of two AO genes in maize. In contrast, ethanol strongly increased the amount of AO proteins, indicating that ethanol enhanced AO activities by promoting the translation. Among three alcohols including ethanol, methanol and isopropanol, only ethanol promoted AO activities. These results suggested that enhancement of AO activities was specific to ethanol, whose level could be naturally increased when the plant roots drove fermentation to overcome low oxygen stresses.
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KEYWORD
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Ethanol, aldehyde oxidase, root, maize(Zea mays)
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