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자료유형
학술저널
저자정보
Kim, Soon-Young (Department of Biology, Andong National University) Mulkey, Timothy J. (Dept. of Life Sciences, Indiana State Univ.)
저널정보
한국식물학회 식물학회지 식물학회지 제40권 제4호
발행연도
1997.1
수록면
249 - 255 (7page)

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We tested that the hypothesis that root elongation might be controlled by altering the level of ethylene in intact primary roots of maize (Zea mays L.). We measured root elongation in a short period using a computerized root auxanometer. Compounds which regulate ethylene production were applied to intact primary roots in different time periods. Root elongation was stimulated by the treatment with ethylene antagonists such as Co2+, aminoethoxyvinylglycine (AVG) and L-canaline. This result suggested that root elongation was closely related to ethylene level of intact primary roots. furthermore, IAA-and 1-aminocyclopropane-1-carboxylic acid (ACC)-induced inhibition of root elongation was reversed by treatment with Co2+. The application of ACC to roots which have been exposed to IAA and Co2+ have no significant effect on root elongation. However, the inhibition of root elongation by ACC in roots previously treated with IAA and AVG became manifest when the applied IAA concentrations were lower. These results were consistent with the hypothesis that the level of ethylene in intact roots functions to moderate root elongation, and suggested that auxin-induced inhibition of root elongation results from auxin induced promotion of ethylene production.

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