Record ID No. |
55 |
Author(s) |
Aspray T.J., Frey-Klett P., Jones J.E., Whipps J.M. Garbaye J., Bending G.D. , 2006 |
Affiliation |
Warwick Horticultural Research International, Warwick CV35 9EF, England |
Title |
Mycorrhization helper bacteria: a case of specificity for altering ectomycorrhiza architecture but not ectomycorrhiza formation. |
Source. Vol.(no):Page |
Mycorrhiza. 16(8): 533-541p |
Categories |
Ectomycorrhiza |
Subjects |
Biological Interaction |
Sub-subjects |
Mycorrhiza helper bacteria |
Host |
Pinus sylvestris, |
Organism |
Lactarius rufus, Laccaria bicolor, Suillus luteus, Paenibacillus sp |
Country |
England, Europe |
Abstracts |
Mycorrhization helper bacteria (MHB), isolated from
phylogenetically distinct ectomycorrhizal symbioses involving
Lactarius rufus, Laccaria bicolor or Suillus luteus, were tested
for fungus specificity to enhance L. rufus-Pinus sylvestris or
L. bicolor-P. sylvestris mycorrhiza formation. As MHB isolated
from the L. rufus and S. luteus mycorrhiza were originally
characterised using a microcosm system, we assessed their
ability to enhance mycorrhiza formation in a glasshouse system
in order to determine the extent to which MHB are
system-specific. Paenibacillus sp. EJP73, an MHB for L. rufus in
the microcosm, significantly enhanced L. bicolor mycorrhiza
formation in the glasshouse, demonstrating that the MHB effect
of this bacterium is neither fungus-specific nor limited to the
original experimental system. Although the five MHB strains
studied were unable to significantly enhance L. rufus mycorrhiza
formation, two of them did have a significant effect on
dichotomous short root branching by L. rufus. The effect was
specific to Paenibacillus sp. EJP73 and Burkholderia sp. EJP67,
the two strains isolated from L. rufus mycorrhiza, and was not
associated with auxin production. Altered mycorrhiza
architecture rather than absolute number of mycorrhizal roots
may be an important previously overlooked parameter for defining
MHB effects.
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