Mechanism of control of root‐feeding nematodes by mycorrhizal fungi in the dune grass <i>Ammophila arenaria</i>

Peña, Eduardo de la; Rodríguez‐Echeverría, Susana; Putten, Wim H. van der; Freitas, Helena; Moens, Maurice

doi:10.1111/j.1469-8137.2005.01602.x

Cited by 160 publications

(88 citation statements)

References 48 publications

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“…AM fungi protect from sedentary nematodes mainly through local mechanisms [11]. Evidence is accumulating that colonization of plant hosts from multiple symbionts results in a complementarity effect with respect to P nutrition and plant growth stimulation [2,14,16] and potentially with per cent root colonization; this could increase protection of the plant host to sedentary nematode attacks.…”

Section: Discussionmentioning

confidence: 99%

Suppression of fungal and nematode plant pathogens through arbuscular mycorrhizal fungi

2011

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Arbuscular mycorrhizal (AM) fungi represent ubiquitous mutualists of terrestrial plants. Through the symbiosis, plant hosts, among other benefits, receive protection from pathogens. A meta-analysis was conducted on 106 articles to determine whether, following pathogen infection of AM-colonized plants, the identity of the organisms involved (pathogens, AM fungi and host plants) had implications for the extent of the AM-induced pathogen suppression. Data on fungal and nematode pathogens were analysed separately. Although we found no differences in AM effectiveness with respect to the identity of the plant pathogen, the identity of the AM isolate had a dramatic effect on the level of pathogen protection. AM efficiency differences with respect to nematode pathogens were mainly limited to the number of AM isolates present; by contrast, modification of the ability to suppress fungal pathogens could occur even through changing the identity of the Glomeraceae isolate applied. N-fixing plants received more protection from fungal pathogens than non-N-fixing dicotyledons; this was attributed to the more intense AM colonization in N-fixing plants.Results have implications for understanding mycorrhizal ecology and agronomic applications.

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Section: Discussionmentioning

confidence: 99%

Suppression of fungal and nematode plant pathogens through arbuscular mycorrhizal fungi

2011

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“…This contemporary occurrence raises a number of reciprocal interactions between these two groups of organisms, among which also a VAM suppressiveness against phytoparasitic nematodes populations (Gera & Cook, 2005). Competition for nutrients or induction of morphological changes or systemic resistance in root tissues were suggested as mechanisms for the nematicidal effect of VAM (De la Peña et al, 2006;Elsen et al, 2008).…”

Section: Irrigation Systems and Practices In Challenging Environmentsmentioning

confidence: 99%

Effects of Irrigation-Fertilization and Irrigation-Mycorrhization on the Alimentary and Nutraceutical Properties of Tomatoes

Cesare¹,

Migliori²,

Ferrari³

et al. 2012

Irrigation Systems and Practices in Challenging Environments

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“…A reduction in the deleterious effects by parasitic nematodes such as Pratylenchus and Meloidogyne spp. has also been reported (de la Peña et al 2006;Li et al 2006). Different mechanisms may explain the protective role exerted by AM fungi; namely, improved plant nutrition, competition for colonization sites or photosynthesis, changes in the root apparatus or the microbial rhizosphere communities, and activation of plant defense mechanisms (Pozo and Azcòn-Aguilar 2007;Wehnera et al 2010;Whipps 2004).…”

mentioning

confidence: 99%

Arbuscular Mycorrhizal Symbiosis Limits Foliar Transcriptional Responses to Viral Infection and Favors Long-Term Virus Accumulation

Miozzi¹,

Catoni²,

Fiorilli³

et al. 2011

MPMI

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Tomato (Solanum lycopersicum) can establish symbiotic interactions with arbuscular mycorrhizal (AM) fungi, and can be infected by several pathogenic viruses. Here, we investigated the impact of mycorrhization by the fungus Glomus mosseae on the Tomato spotted wilt virus (TSWV) infection of tomato plants by transcriptomic and hormones level analyses. In TSWV-infected mycorrhizal plants, the AM fungus root colonization limited virus-induced changes in gene expression in the aerial parts. The virus-responsive upregulated genes, no longer induced in infected mycorrhizal plants, were mainly involved in defense responses and hormone signaling, while the virus-responsive downregulated genes, no longer repressed in mycorrhizal plants, were involved in primary metabolism. The presence of the AM fungus limits, in a salicylic acid-independent manner, the accumulation of abscissic acid observed in response to viral infection. At the time of the molecular analysis, no differences in virus concentration or symptom severity were detected between mycorrhizal and nonmycorrhizal plants. However, in a longer period, increase in virus titer and delay in the appearance of recovery were observed in mycorrhizal plants, thus indicating that the plant's reaction to TSWV infection is attenuated by mycorrhization.Arbuscular mycorrhiza (AM) is the term used to describe the mutualistic association between most land plants and fungi from the phylum Glomeromycota (Parniske 2008). The ability to form this association is widely distributed throughout the plant kingdom, and involves most agricultural, horticultural, and hardwood species (Bonfante and Genre 2010). The symbiosis develops in roots where the fungus colonizes the cortex and obtains carbon from the plant while facilitating the transfer of mineral nutrients to the root cells, through differentiated, highly branched intracellular fungal structures called arbuscules (Bonfante and Anca 2009). The benefits of the AM symbiosis on plant fitness are well described, including a better mineral nutrition and increased ability to overcome biotic and abiotic stresses (Aroca et al. 2008;Gernns et al. 2001;Hildebrandt et al. 2007; Pozo and Azcòn-Aguilar 2007;Pozo et al. 2010;van der Heijden and Sanders 2002).The AM symbiosis can have important impacts on plant interactions with pathogens. Alleviation of damage caused by soilborne pathogens has been widely reported in mycorrhizal plants. Most studies deal with the reduction of incidence or severity of soilborne disease. mainly root rot or wilting caused by fungi such as Rhizoctonia, Fusarium, or Verticillium spp., and root rot caused by oomycetes, including Phytophthora, Pythium, and Alphanomyces spp. Experimental evidence also supports the hypothesis that AM symbiosis preconditions plant tissues for a more effective activation of defense responses against stress. This phenomenon, which is also induced in plants by necrotizing pathogens, plant-growth-promoting fungi and rhizobacteria, or treatment with various natural and synthetic compounds, is know...

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Mechanism of control of root‐feeding nematodes by mycorrhizal fungi in the dune grass Ammophila arenaria

Cited by 160 publications

References 48 publications

Suppression of fungal and nematode plant pathogens through arbuscular mycorrhizal fungi

Suppression of fungal and nematode plant pathogens through arbuscular mycorrhizal fungi

Effects of Irrigation-Fertilization and Irrigation-Mycorrhization on the Alimentary and Nutraceutical Properties of Tomatoes

Arbuscular Mycorrhizal Symbiosis Limits Foliar Transcriptional Responses to Viral Infection and Favors Long-Term Virus Accumulation

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