Lithium,aminoethoxyvinylglycine and cobalt reversal of the cotyledonary pricking-induced growth inhibition in the hypocotyl of Bidens pilosus in relation to ethylene and peroxidases |
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Authors: | Dominique Crouzillat Marie-Odile Desbiez Claude Penel Thomas Gaspar |
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Affiliation: | 1. Laboratoire de Phytomorphogenèse, L.A. C.N.R.S. 45, 4, rue Ledru, 63038 Clermont-Ferrand Cedex France;2. Laboratoire de Physiologie végétale, 3, place de l''Université, CH-1211, Genève 4 Switzerland;3. Institut de Botanique B22, Université de Liège, Sart Tilman, 4000 Liège Belgium |
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Abstract: | Pretreatment of young Bidens pilosus plants with lithium (Li), aminoethoxyvinylglycine (AVG) or cobalt (Co) prevents the cotyledonary pricking-induced growth inhibition of the hypocotyl. The effect is correlated with parallel prevention of the pricking-induced enhancement of peroxidase and ethylene production in the hypocotyl. Only Co prevents the increased capacity of hypocotyl segments or microsomes to convert aminocyclopropane carboxylic acid to ethylene. Li, AVG, and Co do not interfere with peroxidase and ethylene metabolism in pricked cotyledons. Although Li, AVG as well as Co are known to interfere with ethylene biosynthesis and action, they could well remove the wounding effect by different modes of action. |
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Keywords: | wounding ethylene lithium cobalt peroxidase ACC 1-aminocyclopropane-1-carboxylic acid AVG aminoethoxyvinylglycine Co cobalt Li lithium SAM |
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