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http://dx.doi.org/10.5352/JLS.2007.17.2.174

Ca2+ Regulators affect the Gravitropism and Ethylene Production Induced by Malformin A1 in Maize Root  

Hong, Sung-Hyun (Department of Biological Sciences, Andong National University)
Oh, Seung-Eun (Department of Biological Sciences, Konkuk University)
Kim, Kun-Woo (School of Bioresource Sciences, Andong National University)
Jeong, Hyung-Jin (School of Bioresource Sciences, Andong National University)
Kim, Soon-Young (Department of Biological Sciences, Andong National University)
Publication Information
Journal of Life Science / v.17, no.2, 2007 , pp. 174-178 More about this Journal
Abstract
Treatment of malformin A1 is known to increase ethylene production 130% at 4 hr and 56% at 8 hr after treatment in maize root compared to untreated plants. The ethylene production by malformin A1 was maximum level at 4 hr and slowly decreased up to 8 hr. Calcium ion regulators such as A23187 (calcium ionophore) and verapamil (calcium channel blocker) stimulated ethylene production. Treatment of both calcium ion regulators increased about 30% of ethylene production at 4 hr, and 20% at 8 hr. Both calcium ion regulators did not stimulate malformin A1-induced ethylene production at 4 hr as malformin A1 itself did. However, the treatment of calcium ion regulators with malformin A1 maintains the ethylene production for 8 hr. These results suggested that the proper concentration of calcium might need to confer the effect of malformin A1 on the ethylene production. Malformin A1 suppressed the gravitropic curvature of maize root about 58% at 4 hr and 42% at 8 hr compared to control plant. Verapamil inhibited the gravitropic curvature about 54% at 4 hr and 23% at 8 hr compared to control, respectively. But A23187 could not. In addition, verapamil showed more inhibition in malformin A1-induced gravitropic curvature than A23187 in malformin A1 induced. These data suggested that calcium ion regulators affect the malformin A1-induced ethylene production and gravitropic curvature, and give the evidence that calcium ion play an important role in gravitropic curvature in maize root.
Keywords
malformin A1; calcium ion regulators; ethylene; gravitropic curvature; maize root;
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Times Cited By KSCI : 2  (Citation Analysis)
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