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Effect of Glomus mosseae on concentrations of rosmarinic and caffeic acids and essential oil compounds in basil inoculated with Fusarium oxysporum f.sp. basilici
Author(s) -
Toussaint J.P.,
Kraml M.,
Nell M.,
Smith S. E.,
Smith F. A.,
Steinkellner S.,
Schmiderer C.,
Vierheilig H.,
Novak J.
Publication year - 2008
Publication title -
plant pathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.928
H-Index - 85
eISSN - 1365-3059
pISSN - 0032-0862
DOI - 10.1111/j.1365-3059.2008.01895.x
Subject(s) - glomus , ocimum , rosmarinic acid , biology , shoot , basilicum , fusarium oxysporum , essential oil , horticulture , dry weight , fungus , inoculation , botany , caffeic acid , biochemistry , antioxidant
This study investigated the potential of the arbuscular mycorrhizal (AM) fungus Glomus mosseae to protect basil ( Ocimum basilicum ) against Fusarium oxysporum f.sp. basilici ( Fob ). It was hypothesised that G. mosseae could confer a bioprotective effect against Fob as a result of increases in leaf rosmarinic (RA) and caffeic acids (CA) or essential oil concentrations. Glomus mosseae conferred a bioprotective effect against Fob by reducing plant mortality to 20% compared to 33% in non‐mycorrhizal (NM) plants. This bioprotective effect was not related to improved phosphorus (P) nutrition, as AM and NM plants treated with Fob had similar shoot P concentrations (6 and 8 mg g −1 dry weight (DW), respectively). Both AM and NM plants treated with Fob had similar leaf and root RA and CA concentrations. Furthermore, phenolic (40–70 mg CA g −1 DW) or essential oil concentrations (0·1–0·6 mg g −1 DW) were not increased in plants treated with the AM fungus and Fob . Therefore, the bioprotective effect conferred by G. mosseae was not a result of increases in the phytochemicals tested in this study. However, under the AM symbiosis, basil plants treated with Fob had lower methyleugenol concentrations in their leaves (0·1 mg g −1 DW) than NM plants treated with the pathogen (0·6 mg g −1 DW).