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Scots pine (Pinus sylvestris) differentially interacts with Cenococcum geophilum and other simultaneously inoculated mycorrhizal (ECM) fungi

ABSTRACT: To identify specific gene networks induced in host roots by C. geophilum, we inoculated seedlings of Scots pine simultaneously with C. geophilum and either Suillus granulatus or Rhizopogon roseolus, two common ECM fungi associated to pines. We then measured the differential expression of Scots pine genes in the respective mycorrhizas using oligoarrays.

ORGANISM(S): Cenococcum geophilum Pinus sylvestris

PROVIDER: GSE80549 | GEO | 2016/08/01

SECONDARY ACCESSION(S): PRJNA319254

REPOSITORIES: GEO

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Scots pine (Pinus sylvestris) differentially interacts with Cenococcum geophilum and other simultaneously inoculated mycorrhizal (ECM) fungi

Project description:To identify specific gene networks induced in host roots by C. geophilum, we inoculated seedlings of Scots pine simultaneously with C. geophilum and either Suillus granulatus or Rhizopogon roseolus, two common ECM fungi associated to pines. We then measured the differential expression of Scots pine genes in the respective mycorrhizas using oligoarrays. We performed 14 hybridizations (NimbleGen) with samples derived from Pinus sylvestris mycorrhiza with Cenococcum geophilum, Rhizopogon roseolus or Suillus granulatus (3 biological replicates each), as well as from non-mycorrhizal control roots (two replicates). Only the Pinus-derived sequences from the array were considered for this analysis. All samples were labeled with Cy3.

2016-08-01 | E-GEOD-80549 | biostudies-arrayexpress

Transcript profiling of Pinus sylvestris trees as a response to Heterobasidion annosum infection under field conditions

Project description:In conifer forests of Northern Europe, a pathogenic fungus Heterobasidion annosum attacks the roots of Scots pine and causes mortality. Trees with infection grow slower and produce less timber with reduced quality. Despite applied control methods, such as switching tree species to a non-host species, or stump treatment, root and butt rot continues to be a serious forest health problem. Disease resistance breeding is a less-applied control method which has potential to improve tree health. However, neither conifer genotypes with absolute resistance to Heterobasidion sp. nor robust selection markers for resistance breeding have been found. We studied the responses of various Scots pine genotypes to Heterobasidion annosum infection and mechanic damage in drained peatland. Stems and roots of mature naturally regenerated Scots pine trees growing in drained peatland were either artificially infected with H. annosum or wounded and inoculated with sterile inoculum. Untreated trees from the study sites served as controls. Responses of different Scots pine genotypes to pathogen infection as determined by lesion size were recorded from samples harvested four months after inoculation, and least susceptible and highly susceptible genotypes were selected from the study material. Analysis of terpenoids from both least susceptible and highly susceptible pine genotypes by gas chromatography coupled with mass spectrometry indicates that some monoterpenes and sesquiterpenes are differentially induced depending on the susceptibility level. Transcriptomic microarray analysis was therefore conducted with RNA from stems of the least susceptible and highly susceptible Scots pine genotypes. Gene expression data from cDNA microarray were analysed by comparisons between the treatments, and the genotypes with different resistance level. The aim of the study is to highlight transcripts specific to differing levels of susceptibility.

2019-02-01 | GSE66168 | GEO

The endosymbiont Methylorubrum extorquens DSM13060 reprograms development and stress responses of Scots pine seedlings

Project description:The meristem-associated endosymbiont M. extorquens DSM13060 significantly increases needle and root growth of Scots pine (Pinus sylvestris L.) seedlings without producing plant hormones, but by aggregating around host nuclei. Here we studied gene expression of the pine host induced by M. extorquens DSM13060 infection. We selected the time point of 90 days post-inoculation for our analysis based, because at this point, Methylorubrum extorquens DSM13060 has systemically colonized the pine seedlings, being found throughout tissues of roots and shoots.

2021-04-15 | GSE170995 | GEO

Transcriptional response of Scots pine trees to Heterobasidion annosum infection: analyses of antimicrobial protein Sp-AMP2

Project description:Understanding of mechanisms of resistance of forest trees against microbial pathogens is an essential prerequisite for the development of sustainable forestry practices and for the improvement of commercially-grown trees via either conventional breeding or rational genetic engineering. We have studied the transcriptional response of Scots pine trees to Heterobasidion annosum infection under field conditions. By comparing responses of trees to wounding and to fungal inoculation we could identify a set of genes that were specifically responding to fungal infection. We have also investigated a contribution of Scots pine antimicrobial protein Sp-AMP2 to the host antimicrobial defense to evaluate the potential of Sp-AMP genes as molecular markers for resistance breeding.

2017-12-31 | GSE87881 | GEO

Comparative transcriptome analysis of early interaction events in Scots pine root tissues following challenge (1dpi)

Project description:Comparative transcriptome analysis of early interaction events in Scots pine root tissues following challenge with a pathogenic, saprophytic or symbiotic fungus. Seedlings of P. sylvestris (19 days post germination) were transferred to wet, sterile filter paper on Petri-plates. Thereafter, the roots of the seedlings were inoculated with the mycelial homogenate of either Heterobasidion annosum (FP5, P-type) a pathogenic root rot fungus which attacks Norway spruce, Scots pine and broad leaf trees or Laccaria bicolor, an obligate ectomycorrhizal symbiont or Trichoderma aureoviride- an obligate saprotroph. Thereafter, incubated for 30 minutes, during which time some hyphae adhered to the roots. The inoculated seedlings (ten) were then transferred to another wet sterile filter paper placed on 1% water agar in Petri dishes. A second set of moist sterile filter paper was laid over the roots. The region of the Petri-dish containing the roots was covered with aluminium foil and the edges of the plate sealed with parafilm. The seedlings were then incubated for 24 hr under a photoperiod of 16h light at 20 ÂºC. Control seedlings were âinoculatedâ with sterile distilled water.

2010-05-27 | E-GEOD-2089 | biostudies-arrayexpress

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Project description:Activation of defense pathways in Scots pine bark after feeding by Pine Weevil (Hylobius abietis)

| PRJNA258155 | ENA

Cryptic genetic variation and adaptation to waterlogging in Caledonian Scots pine, Pinus sylvestris L.

Project description: Not available

| S-EPMC6157661 | biostudies-literature

Comparative transcriptome analysis of early interaction events in Scots pine root tissues following challenge (1dpi)

Project description:Comparative transcriptome analysis of early interaction events in Scots pine root tissues following challenge with a pathogenic, saprophytic or symbiotic fungus. Seedlings of P. sylvestris (19 days post germination) were transferred to wet, sterile filter paper on Petri-plates. Thereafter, the roots of the seedlings were inoculated with the mycelial homogenate of either Heterobasidion annosum (FP5, P-type) a pathogenic root rot fungus which attacks Norway spruce, Scots pine and broad leaf trees or Laccaria bicolor, an obligate ectomycorrhizal symbiont or Trichoderma aureoviride- an obligate saprotroph. Thereafter, incubated for 30 minutes, during which time some hyphae adhered to the roots. The inoculated seedlings (ten) were then transferred to another wet sterile filter paper placed on 1% water agar in Petri dishes. A second set of moist sterile filter paper was laid over the roots. The region of the Petri-dish containing the roots was covered with aluminium foil and the edges of the plate sealed with parafilm. The seedlings were then incubated for 24 hr under a photoperiod of 16h light at 20 ºC. Control seedlings were ‘inoculated’ with sterile distilled water. Keywords: other

2004-12-21 | GSE2089 | GEO

Pinus sylvestris

Project description:Comparative transcriptome analysis of early interaction events in Scots pine root tissues following challenge (1dpi)

| PRJNA104755 | ENA

Pinus sylvestris

Project description:Transcriptional response of Scots pine trees to Heterobasidion annosum infection: analyses of antimicrobial protein Sp-AMP2

| PRJNA348098 | ENA