Record Details

Title:
Inhibition of IAA-induced ethylene production in etiolated mung bean hypocotyl segments by 2,3,5-triiodobenzoic acid and 2-(p-chlorophenoxy)-2-methyl propionic acid
Publication date:
1984
Summary:
The effect of two auxin antagonists, 2,3,5-triiodobenzoic acid (TIBA) and 2-(p-chlorophenoxy)-2-methyl propionic acid (CMPA) on IAA-induced ethylene production in etiolated mungbean hypocotyl [Vigna radiata (L.) Wilczek cv. Berken] segments was studied. Both TIBA and CMPA inhibited IAA-induced ethylene production and CO2 production at concentrations from 0.001 mM to 0.1 mM and 0.01 mM to 1.0 mM, respectively. The optimum concentration for inhibition of ethylene production by TIBA was 0.05 mM and CMPA was 0.5 mM. After 18 h, mungbean hypocotyl segments treated with 0.05 mM TIBA for 6 h or 0.5 mM CMPA for 8 h showed a maximum inhibition of IAA-induced ethylene production. Treatments longer than 8 h caused no further inhibition. The results of treatment sequences showed that TIBA needed to be applied prior to IAA in order to inhibit IAA-induced ethylene production, but CMPA caused the same inhibitory effect whether applied before or after IAA treatment. TIBA inhibits auxin-induced ethylene production in etiolated mungbean hypocotyl segments by blocking auxin movement into the tissue whereas CMPA may work on both auxin transport and action. [AS/SS]
Call number:
A:PS
Journal citation:
Contact information:
harvest@worldveg.org

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 Record created 1985-05-30, last modified 2019-03-04


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