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Rutin, the phenolglycoside from eucalyptus root exudates, stimulates Pisolithus hyphal growth at picomolar concentrations
Author(s) -
Lagrange Hubert,
JayAllgmand Christian,
Lapeyrie Frédéric
Publication year - 2001
Publication title -
new phytologist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.742
H-Index - 244
eISSN - 1469-8137
pISSN - 0028-646X
DOI - 10.1046/j.1469-8137.2001.00027.x
Subject(s) - pisolithus , rutin , eucalyptus globulus , hypha , botany , flavonoid , biology , mycorrhiza , rhizosphere , eucalyptus , seedling , chemistry , symbiosis , bacteria , biochemistry , genetics , antioxidant
• Ectomycorrhizal hyphal growth is shown to be stimulated by a phenol compound isolated from Eucalyptus globulus ssp. bicostata root exudates, highlighting the importance of phenolics in host–fungal interaction. • HPLC analysis allowed separation and identification of phenolic compounds from Eucalyptus seedling tissues and root exudates. The activity of the flavonol, rutin, was tested on a range of mycorrhizal and saprophytic fungi. • Rutin stimulated Pisolithus hyphal growth by more than twofold, and the fungus responded significantly to concentrations as low as 1 pM; only a few strains responded. • Rutin from Eucalyptus globulus ssp. bicostata root exudates is a flavonoid signal for Pisolithus , and is the first such flavonoid signal identified. A rutin gradient could contribute to orientating hyphal elongation toward the root tip thereby favouring mycorrhizal infection, and might also influence the interaction between fungi in the rhizosphere.