Levels of a terpenoid glycoside (blumenin) and cell wall-bound phenolics in some cereal mycorrhizas.

AUTOR(ES)

Maier, W

RESUMO

Four cereals, Hordeum vulgare (barley), Triticum aestivum (wheat), Secale cereal (rye), and Avena sativa (oat), were grown in a defined nutritional medium with and without the arbuscular mycorrhizal fungus Glomus intraradices. Levels of soluble and cell wall-bound secondary metabolites in the roots of mycorrhizal and nonmycorrhizal plants were determined by high-performance liquid chromatography during the first 6 to 8 weeks of plant development. Whereas there was no difference in the levels of the cell wall-bound hydroxycinnamic acids, 4-coumaric and ferulic acids, there was a fungus-induced change of the soluble secondary root metabolites. The most obvious effect observed in all four cereals was the induced accumulation of a terpenoid glycoside. This compound was isolated and identified by spectroscopic methods (nuclear magnetic resonance, mass spectrometry) to be a cyclohexenone derivative, i.e. blumenol C 9-O-(2'-O-beta-glucuronosyl)-beta-glucoside. The level of this compound was found to be directly correlated with the degree of root colonization.

Documentos Relacionados

• Expression and Function of Cell Wall-Bound Cationic Peroxidase in Asparagus Somatic Embryogenesis
• Characterization of the Cell Wall-Bound Proteinase of Lactobacillus casei HN14
• Phytochrome Control of Cell Wall-bound Hydroxyproline Content in Etiolated Pea Epicotyls 1
• Purification and Some Properties of Cell Wall-bound Invertases from Sugar Beet Seedlings and Aged Slices of Mature Roots
• The bglA Gene of Aspergillus kawachii Encodes Both Extracellular and Cell Wall-Bound β-Glucosidases