Abstract
Attempts to isolate the ascomycete Hydnotrya tulasnei from fresh hypogeous sporocarps into a pure culture yielded beside H. tulasnei also a strain of Meliniomyces variabilis (MVA-2). Both phenotype and genotype analyses showed that MVA-2 was highly similar to another M. variabilis strain, isolated previously from a root tip of Picea abies . The mycorrhizal potential of both H. tulasnei and M.variabilis is still dubious. Therefore, we tried an in vitro synthesis of root-fungus association between H. tulasnei , both M. variabilis strains and typically ectomycorrhizal ( P. abies and Pinus sylvestris ) and typically ericoid mycorrhizal ( Vaccinium corymbosum ) host plants. For comparison, a strain of Rhizoscyphus ericae was included. Both M. variabilis strains formed intracellular structures characteristic of ericoid mycorrhiza in V. corymbosum roots, and also colonised the roots of P. abies and P.sylvestris seedlings, modifying their morphology. Superficially, Picea and Pinus root tips resembled early stages of EcM development, but transversal sections revealed absence of the Hartig net and frequent intracellular colonisation of the cortex. The reference strain of R. ericae showed similar behaviour in Picea , Pinus and Vaccinium roots, only the intracellular colonisation was more intensive and morphology of roots of both conifers was less changed when compared to M. variabilis . H. tulasnei failed to colonise the roots of P. abies and V. corymbosum , possibly due to sub-optimal conditions for its growth.
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Claims 10
Claim · model-written summary
Meliniomyces variabilis MVA-2 was highly similar to an earlier root-tip isolate.
- Taxon
- Picea abies
Picea abiese0 - Interactor
- MVA-2e0symbiont
- Outcome
- highly similare0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both phenotype and genotype analyses showed that MVA-2 was highly similar to another M. variabilis strain, isolated previously from a root tip of Picea abies .”
Claim · model-written summary
Both M. variabilis strains formed ericoid mycorrhizal intracellular structures in Vaccinium roots.
- Taxon
- V. corymbosum
Vaccinium corymbosume0 - Interactor
- M. variabilisHyaloscypha variabilise0symbiont
- Outcome
- intracellular structures characteristic of ericoid mycorrhizae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both M. variabilis strains formed intracellular structures characteristic of ericoid mycorrhiza in V. corymbosum roots”
Claim · model-written summary
Both M. variabilis strains colonised Picea roots and modified morphology.
- Taxon
- P. abiesPicea abiese0
- Interactor
- M. variabilisHyaloscypha variabilise1symbiont
- Outcome
- colonised the rootse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“also colonised the roots of P. abies and P.sylvestris seedlings, modifying their morphology.”
t0“Meliniomyces variabilis”
t1“Meliniomyces variabilis”
e1“Both M. variabilis strains formed intracellular structures”
Claim · model-written summary
Both M. variabilis strains colonised Pinus roots and modified morphology.
- Taxon
- P.sylvestris
Pinus sylvestrise0 - Interactor
- M. variabilisHyaloscypha variabilise1symbiont
- Outcome
- colonised the rootse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“also colonised the roots of P. abies and P.sylvestris seedlings, modifying their morphology.”
t0“Meliniomyces variabilis”
t1“Meliniomyces variabilis”
e1“Both M. variabilis strains formed intracellular structures”
Claim · model-written summary
Conifer root tips resembled early ectomycorrhizal development but lacked a Hartig net and often showed cortical intracellular colonisation.
- Interactor
- Meliniomyces variabilisHyaloscypha variabilist0symbiont
- Outcome
- absence of the Hartig net and frequent intracellular colonisation of the cortexe0
Picea
PinusOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Picea and Pinus root tips resembled early stages of EcM development, but transversal sections revealed absence of the Hartig net and frequent intracellular colonisation of the cortex.”
t0“Meliniomyces variabilis”
t1“Meliniomyces variabilis”
Claim · model-written summary
R. ericae showed similar root colonisation behavior in Picea, Pinus and Vaccinium.
- Interactor
- R. ericae
_1.jpg?width=60)
Hyaloscypha hepaticicolae0symbiont - Outcome
- similar behavioure0
VacciniumOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
_1.jpg?width=500)
Verbatim
e0“The reference strain of R. ericae showed similar behaviour in Picea , Pinus and Vaccinium roots”
Claim · model-written summary
R. ericae produced more intensive intracellular colonisation than M. variabilis.
- Interactor
- R. ericaeHyaloscypha hepaticicolae1symbiont
- Outcome
- intracellular colonisatione0
- Direction
- more intensivee0
- Comparator
- M. variabilise0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“only the intracellular colonisation was more intensive and morphology of roots of both conifers was less changed when compared to M. variabilis .”
t0“Picea , Pinus and Vaccinium roots”
e1“The reference strain of R. ericae showed similar behaviour”
Claim · model-written summary
R. ericae changed conifer root morphology less than M. variabilis.
- Interactor
- R. ericaeHyaloscypha hepaticicolae1symbiont
- Outcome
- morphology of roots of both coniferse0
- Direction
- less changede0
- Comparator
- M. variabilise0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“morphology of roots of both conifers was less changed when compared to M. variabilis .”
t0“Picea , Pinus and Vaccinium roots”
e1“The reference strain of R. ericae showed similar behaviour”
Claim · model-written summary
H. tulasnei failed to colonise Picea roots.
- Taxon
- P. abiesPicea abiese0
- Interactor
- H. tulasnei
Hydnotrya tulasneie0symbiont - Outcome
- failed to colonise the rootse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“H. tulasnei failed to colonise the roots of P. abies and V. corymbosum , possibly due to sub-optimal conditions for its growth.”
Claim · model-written summary
H. tulasnei failed to colonise Vaccinium roots.
- Taxon
- V. corymbosumVaccinium corymbosume0
- Interactor
- H. tulasneiHydnotrya tulasneie0symbiont
- Outcome
- failed to colonise the rootse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“H. tulasnei failed to colonise the roots of P. abies and V. corymbosum , possibly due to sub-optimal conditions for its growth.”