Effect of aminocyclopropane carboxylic acid and aminoethoxyvinylglycine on ethylene production by ectomycorrhizal fungi

Rupp, Larry; deVries, H.; Mudge, Kenneth W.

doi:10.1139/b89-068

Cited by 14 publications

(4 citation statements)

References 10 publications

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“…Indeed, the activation of defense mechanisms in P. deltoides may inhibit L. bicolor colonization, while in P. trichocarpa this inhibition may be repressed by the overexpression of EREBP-4 ethylenesensitive transcription factor. Our results support the conclusions by Felten et al (2010), Rupp et al (1989), and Splivallo et al (2009) that ethylene, released by Laccaria, plays a role in primary response of the host plant. Thus, the initial steps in successful colonization may involve Laccaria manipulating the host's metabolic machinery and subsequently, decreasing their defenses.…”

Section: Discussionsupporting

confidence: 91%

Identification of quantitative trait loci affecting ectomycorrhizal symbiosis in an interspecific F1 poplar cross and differential expression of genes in ectomycorrhizas of the two parents: Populus deltoides and Populus trichocarpa

Labbé

Jorge²,

Kohler

et al. 2011

Tree Genetics & Genomes

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A Populus deltoides×Populus trichocarpa F 1 pedigree was analyzed for quantitative trait loci (QTLs) affecting ectomycorrhizal development and for microarray characterization of gene networks involved in this symbiosis. A 300 genotype progeny set was evaluated for its ability to form ectomycorrhiza with the basidiomycete Laccaria bicolor. The percentage of mycorrhizal root tips was determined on the root systems of all 300 progeny and their two parents. QTL analysis identified four significant QTLs, one on the P. deltoides and three on the P. trichocarpa genetic maps. These QTLs were aligned to the P. trichocarpa genome and each contained several megabases and encompass numerous genes. NimbleGen whole-genome microarray, using cDNA from RNA extracts of ectomycorrhizal root tips from the parental genotypes P. trichocarpa and P. deltoides, was used to narrow the candidate gene list. Among the 1,543 differentially expressed genes (p value ≤ 0.05; ≥5.0-fold change in transcript level) having different transcript levels in mycorrhiza of the two parents, 41 transcripts were located in the QTL intervals: 20 in Myc_d1, 14 in Myc_t1, and seven in Myc_t2, while no significant differences among transcripts were found in Myc_t3. Among these 41 transcripts, 25 were overrepresented in P. deltoides relative to P. trichocarpa; 16 were overrepresented in P. trichocarpa. The transcript showing the highest overrepresentation in P. trichocarpa mycorrhiza libraries compared to P. deltoides mycorrhiza codes for an ethylene-sensitive EREBP-4 protein which may repress defense mechanisms in P. trichocarpa while the highest overrepresented transcripts in P. deltoides code for proteins/genes typically associated with pathogen resistance.

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Section: Discussionsupporting

confidence: 91%

Identification of quantitative trait loci affecting ectomycorrhizal symbiosis in an interspecific F1 poplar cross and differential expression of genes in ectomycorrhizas of the two parents: Populus deltoides and Populus trichocarpa

Labbé

Jorge²,

Kohler

et al. 2011

Tree Genetics & Genomes

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“…Impairment of pre-symbiotic lateral root induction in hairy root culture of the auxin-resistant diageotropica tomato mutant suggests that Myc factor-dependent lateral root induction is similarly channeled into the auxin-controlled developmental outcome (Hanlon and Coenen, 2010). Ectomycorrhizal fungi such as Laccaria bicolor and Tuber melanosporum trigger the production of lateral roots prior to colonization through the stimulation of auxin signaling, likely due to their production and release of auxin and ethylene or other volatile compounds (Rupp et al, 1989; Karabaghli-Degron et al, 1998; Ivanchenko et al, 2008; Felten et al, 2009, Felten et al, 2010; Splivallo et al, 2009; Sukumar et al, 2013). Likewise it is possible that also AM fungi produce plant hormones such as auxin and ethylene or other volatile compounds in addition to Myc-LCOs ( Figure 2 ), and this might for example explain SYM pathway-independent lateral root induction in rice, while in nodulating legumes common SYM-mediated lateral root induction might be epistatic to auxin signaling.…”

Section: Lateral Root Induction By Am Fungi Is Regulated At Multiple mentioning

confidence: 99%

Multiple control levels of root system remodeling in arbuscular mycorrhizal symbiosis

Gutjahr¹,

Paszkowski²

2013

Front. Plant Sci.

142

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In nature, the root systems of most plants develop intimate symbioses with glomeromycotan fungi that assist in the acquisition of mineral nutrients and water through uptake from the soil and direct delivery into the root cortex. Root systems are endowed with a strong, environment-responsive architectural plasticity that also manifests itself during the establishment of arbuscular mycorrhizal (AM) symbioses, predominantly in lateral root proliferation. In this review, we collect evidence for the idea that AM-induced root system remodeling is regulated at several levels: by AM fungal signaling molecules and by changes in plant nutrient status and distribution within the root system.

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“…First, the gas ethylene released by Laccariaand other ECM fungi has already been proposed to play a role in fungal signalling. 2,9 Furthermore, it has been demonstrated that fungi can produce jasmonate derivatives, 10 which may be involved in volatile signalling. Interestingly, exogenously applied ethylene and jasmonates interact with auxin pathways by activating auxin biosynthetic enzymes (Anthranilate Synthase 1-ASA1) and (Tryptophane Amino Transferase-TAA1) in roots and hence stimulate LR formation.…”

Section: Arabidopsis Thaliana and The Ectomycorrhizal Fungus Laccariamentioning

confidence: 99%

Lateral root stimulation in the early interaction betweenArabidopsis thalianaand the ectomycorrhizal fungusLaccaria bicolor

Felten

Legué

Ditengou

2010

Plant Signaling & Behavior

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Lateral root (LR) stimulation during early signal exchange between plant roots and ectomycorrhizal (ECM) fungi has recently been shown to be achieved by modulation of auxin gradients. We suggested that this modulation could occur through altered polar auxin transport (PAT) and through activation of auxin signalling pathways in the root. However, it remains unclear, which fungal molecules alter auxin pathways inside the plant partner. It has been suggested in previous studies that auxin released by the fungus could trigger observed plant responses during early signal exchange and later on during root colonization. Here we focus on the early interaction and we provide evidence for an alternative mechanism. Indeed, LR stimulation by the fungus in A. thaliana followed a totally different timing than with exogenously applied auxin. Furthermore, experimental conditions that excluded the exchange of soluble molecules while allowing exchange of volatile(s) between the plant and the fungus were sufficient for LR induction, therefore questioning the role of secreted fungal auxin. These data suggest that volatiles released by the fungus and sensed by the plant may act upstream of altered auxin signalling in the plant.

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Effect of aminocyclopropane carboxylic acid and aminoethoxyvinylglycine on ethylene production by ectomycorrhizal fungi

Cited by 14 publications

References 10 publications

Identification of quantitative trait loci affecting ectomycorrhizal symbiosis in an interspecific F1 poplar cross and differential expression of genes in ectomycorrhizas of the two parents: Populus deltoides and Populus trichocarpa

Identification of quantitative trait loci affecting ectomycorrhizal symbiosis in an interspecific F1 poplar cross and differential expression of genes in ectomycorrhizas of the two parents: Populus deltoides and Populus trichocarpa

Multiple control levels of root system remodeling in arbuscular mycorrhizal symbiosis

Lateral root stimulation in the early interaction betweenArabidopsis thalianaand the ectomycorrhizal fungusLaccaria bicolor

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