Accumulation of phytoalexins in leaves of plane tree (Platanus spp.) expressing susceptibility or resistance toCeratocystis fimbriata f. sp.platani |
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| Authors: | C El Modafar A Clérivet A Vigouroux J J Macheix |
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| Institution: | (1) Laboratory of Biotechnology and Applied Plant Physiology, University Montpellier 2, Place Eugène Bataillon, 34095 Montpellier Cedex 5, France;(2) Laboratory of Biology and Plant Pathology, INRA, 2 Place Viala, 34060 Montpellier Cedex 1, France |
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| Abstract: | Inoculation of leaves of resistantPlatanus occidentalis and susceptiblePlatanus acerifolia leaves withCeratocystis fimbriata f. sp.platani, the canker stain disease agent, induced foliar necrosis and biosynthesis of two phytoalexins, scopoletin and umbelliferone. Foliar symptoms keep localized and accumulation of coumarin phytoalexins was rapid for incompatible interactions. Necrosis spread widely and accumulation of these phenolic compounds was much later and lower for compatible interactions. The differential response could be used in a genetic improvement program for resistance against canker stain. |
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| Keywords: | Ceratocystis fimbriata phytoalexins Platanus spp resistance |
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