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.
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Abbreviations
- GLC:
-
gas-liquid chromatography
- dIHB:
-
3,5-diiodo-4-hydroxybenzoic acid
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This study forms part of research to be submitted for PhD degree and supported by a grant from Consejo Nacional de Ciencia y Tecnología (México).
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Robert, M.L., Taylor, H.F. & Wain, R.L. Ethylene production by cress roots and excised cress root segments and its inhibition by 3,5-diiodo-4-hydroxybenzoic acid. Planta 126, 273–284 (1975). https://doi.org/10.1007/BF00388969
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DOI: https://doi.org/10.1007/BF00388969