Ethylene Production by Cress Roots and Excised Cress Root Segments and Its Inhibition by 3,5-Diiodo-4-hydroxybenzoic Acid

3,5-Diiodo-4-hydroxybenzoic acid (DIHB) has been shown to exert an inhibitory effect on the formation of ethylene by the roots of intact cress Lepidium sativum seedlings in light, and by excised cress root segments. Adding IAA to the culture solution greatly promoted ethylene production, which was s...

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Bibliographic Details
Published in:Planta 1975-01, Vol.126 (3), p.273-284
Main Authors: Robert, M. L., Taylor, H. F., Wain, R. L.
Format: Article
Language:English
Subjects:
Ethylene production
Flasks
Gas samples
Mitochondria
Nutrient solutions
Plant roots
Plants
Respiration
Root growth
Seedlings
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Summary:3,5-Diiodo-4-hydroxybenzoic acid (DIHB) has been shown to exert an inhibitory effect on the formation of ethylene by the roots of intact cress Lepidium sativum seedlings in light, and by excised cress root segments. Adding IAA to the culture solution greatly promoted ethylene production, which was suppressed by DIHB. The findings together with results obtained with dinitrophenol (DNP), L-methionine and L-ethionine and also the horseradish peroxidase/methional system of Yang are discussed. The results indicate that the effect of DIHB in promoting the root growth of cress seedlings in nutrient solution in the light operates, at least in part, by suppressing the formation of the root growth inhibitor ethylene.
ISSN:0032-0935
1432-2048
DOI:10.1007/BF00388969