Premium
Influence of glucosinolate content of Brassica (Cruciferae) roots on growth of vesicular–arbuscular mycorrhizal fungi
Author(s) -
GLENN M. G.,
CHEW F. S.,
WILLIAMS P. H.
Publication year - 1988
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 - 10.1111/j.1469-8137.1988.tb00255.x
Subject(s) - brassica , biology , glucosinolate , glomus , botany , mycorrhiza , fungus , brassicaceae , spore , symbiosis , bacteria , genetics
SUMMARY We tested the hypothesis that failure to establish symbiosis with vesicular‐arbuscular (VA) mycorrhizal fungi is correlated with glucosinolate concentrations in Brassica , a representative genus of the Capparales. Brassica campestris and B. napus cultivars (brassica) with a range of glucosinolate concentrations (7–524 μmol g 1 f. wt in roots) were grown together with the VA mycorrhizal fungi Glomus mosseae and Gigaspora gigantea in agar. Fungal growth was observed in situ but fungi did not penetrate brassica roots. However, normal germ tube growth of the VA mycorrhizal fungi occurred near brassica roots when compatible hosts grew nearby. These compatible hosts developed normal mycorrhizal infections. These results suggest that brassica roots do not produce a diffusable inhibitor of VA mycorrhizal fungi, but lack a diffusable growth stimulus present near roots of compatible hosts.