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http://dx.doi.org/10.7732/kjpr.2018.31.6.597

Effect of Colchicine on the Growth and Gravitropic Response via Ethylene Production in Arabidopsis Roots  

Kim, Seon Woong (Department of Biological Sciences, Andong National University)
Park, Arom (Department of Biological Sciences, Andong National University)
Ahn, Dong Gyu (Department of Biological Sciences, Andong National University)
Kim, Soon Young (Department of Biological Sciences, Andong National University)
Publication Information
Korean Journal of Plant Resources / v.31, no.6, 2018 , pp. 597-603 More about this Journal
Abstract
Inhibitory effect of colchicine on growth and gravitropic responses in Arabidopsis root was explored to find whether there was an involvement of ethylene production. It has been known that cytoskeleton components are implicated in sedimentation of statoliths to respond to gravitropism and growth. The root growth was inhibited by 25% and 40% over control for 8 hr treatment of colchicine at a concentration of $10^{-5}M$ and $10^{-7}M$, respectively. The roots treated with colchicine at the concentration of $10^{-7}M$ showed the same pattern as control in 3 hr, however, gravitropic response was decreased in the next 5 hr. The colchicine treatment at the concentration of $10^{-5}M$ inhibited the gravitropic response resulting in $60^{\circ}$ of curvature. In order to better understand the role of colchicine, the production of ethylene was measured with and without the treatment of colchicine. Colchicine increased the ethylene production by 20% when compared to control via the activation of ACC oxidase and ACC synthase activity. These results suggest that the inhibition of the growth and gravitropic responses of Arabidopsis roots by the treatment of colchicine could be attributed to the rearrangement of microtubule, and increase of ethylene production.
Keywords
Arabidopsis root; Colchicine; Ethylene; Gravitropic response; Growth;
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