24‐Methyl/methylene sterols increase in monoxenic roots after colonization by arbuscular mycorrhizal fungi - Université du Littoral Côte d'Opale Accéder directement au contenu
Article Dans Une Revue New Phytologist Année : 2004

24‐Methyl/methylene sterols increase in monoxenic roots after colonization by arbuscular mycorrhizal fungi

Résumé

x * Characteristic sterols of transformed carrot (Daucus carota) and chicory (Cichorium intybus) roots colonized by different strains of arbuscular mycorrhizal (AM) fungi were identified. * Sterols were extracted, analysed and identified by gas chromatography/mass spectrometry (GC-MS) from monoxenic cultures of mycorrhizal and nonmycorrhizal roots. After colonization by Glomus intraradices, Glomus proliferum and Glomus sp., carrot and chicory roots exhibited a significantly higher 24-methyl/methylene sterol content. A correlation was established between the content of the sum of 24methyl cholesterol, 24-methylene cholesterol and 24-methyl desmosterol. * This study clearly established that the increment of these characteristic sterols is an appropriate indicator of colonization by AM fungi of transformed roots. * Metabolic origin and specificity of these sterols in mycorrhizal roots was researched. The 24-methyl/methylene sterol increase was observed only when the interaction between fungus and plant was completely established and the fungus was present inside the roots.

Dates et versions

hal-03715471 , version 1 (04-12-2023)

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Joël Fontaine, Anne Grandmougin-Ferjani, V Glorian, Roger Durand. 24‐Methyl/methylene sterols increase in monoxenic roots after colonization by arbuscular mycorrhizal fungi. New Phytologist, 2004, 163, pp.159 - 167. ⟨10.1111/j.1469-8137.2004.01075.x⟩. ⟨hal-03715471⟩
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