Not to be suppressed? Rethinking the host response at a root-parasite interface

Goto, Derek B.; Miyazawa, Hikota; Mar, Jessica C.; Sato, Mitsuru

doi:10.1016/j.plantsci.2013.08.004

Cited by 20 publications

(12 citation statements)

References 61 publications

(101 reference statements)

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“…Heterodera populations occur throughout the country and in both lowland and hill country situations (Skipp and Christensen 1983;Mercer and Woodfield 1986). The formation of desiccationtolerant cysts filled with eggs ensures their survival for long periods in unfavourable soil conditions, and some species have been shown to only hatch from the encysted eggs in response to exudates of a favourable host (Goto et al 2013). Meloidogyne distribution is somewhat more limited and some species have well defined geographic ranges.…”

Section: Life Cycle and Biologymentioning

confidence: 99%

Quantifying the economic cost of invertebrate pests to New Zealand’s pastoral industry

Ferguson

Barratt

Bell

et al. 2018

New Zealand Journal of Agricultural Research

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Two exotic pests, Argentine stem weevil (ASW) and clover root weevil (CRW) are causing damage estimated at up to $200 M p.a. and $235 M p.a. respectively in dairy and sheep and beef pastures. While CRW is subject to successful biological control management it still causes considerable losses. Lesser pests also contribute to lost production, particularly as they often coexist with more major pests. However, their economic cost to New Zealand is difficult to calculate due to the variable nature of infestations on both temporal and spatial scales. At farm and paddock level, it is abundantly clear that substantial savings could be made if pest management is achieved. It is equally clear that in many instances the tools to do so are limited but if developed would contribute substantially to farm profitability.

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Section: Life Cycle and Biologymentioning

confidence: 99%

Quantifying the economic cost of invertebrate pests to New Zealand’s pastoral industry

Ferguson

Barratt

Bell

et al. 2018

New Zealand Journal of Agricultural Research

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“…It is equally possible that defense-like signaling responses are actually induced and required during colonization by P. indica and S. vermifera in order to establish and maintain symbiosis. Noncompromised jasmonate signaling seems to be important for the interaction between roots and beneficial microorganisms in addition to its role in plant developmental pathways (Hause & Schaarschmidt, 2009;Goto et al, 2013). Early defense-like responses such as activation of the JA and phenylpropanoid pathways and enhanced flavonoid biosynthesis can function as promoting signals for AM fungi (by inducing germination and presymbiotic fungal growth) and stimulate the expression of nodulation genes in symbiotic rhizobacteria, leading to enhanced nodulation efficiency and greater rhizobia attraction to the roots (Hause & Schaarschmidt, 2009).…”

Section: Defense-related Genes and Phytohormones Regulation During Enmentioning

confidence: 99%

Mutualistic root endophytism is not associated with the reduction of saprotrophic traits and requires a noncompromised plant innate immunity

et al. 2015

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SummaryDuring a compatible interaction, the sebacinoid root-associated fungi Piriformospora indica and Sebacina vermifera induce modification of root morphology and enhance shoot growth in Arabidopsis thaliana.The genomic traits common in these two fungi were investigated and compared with those of other root-associated fungi and saprotrophs. The transcriptional responses of the two sebacinoid fungi and of Arabidopsis roots to colonization at three different symbiotic stages were analyzed by custom-designed microarrays.We identified key genomic features characteristic of sebacinoid fungi, such as expansions for gene families involved in hydrolytic activities, carbohydrate-binding and protein-protein interaction. Additionally, we show that colonization of Arabidopsis correlates with the induction of salicylic acid catabolism and accumulation of jasmonate and glucosinolates (GSLs). Genes involved in root developmental processes were specifically induced by S. vermifera at later stages during interaction.Using different Arabidopsis indole-GSLs mutants and measurement of secondary metabolites, we demonstrate the importance of the indolic glucosinolate pathway in the growth restriction of P. indica and S. vermifera and we identify indole-phytoalexins and specifically indole-carboxylic acids derivatives as potential key players in the maintenance of a mutualistic interaction with root endophytes.

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“…At the initial site of contact, further signaling takes place between host cells and the nematode, which may include a series of exchanges of nematode-associated molecules and host proteins. Host defense at the molecular level is thought to operate according to the zig-zag model, in which unmatched pathogen-or host-derived activity determines the outcome of susceptibility or immunity, and this initiates a series of signals between the host and the nematode or nematode-associated molecules (39). In the case of a resistant response, immunity against biotrophic pests is often associated with a hypersensitive response, characterized by rapid and localized cell death, which helps to isolate the pest.…”

Section: Attraction To Host Rootsmentioning

confidence: 99%

“…Roots acquire water and nutrients from the soil; any biotic or abiotic factor that damages roots or reduces root growth prevents the plant from reaching this potential. The plant root interfaces with many organisms, some of which are beneficial, such as plant growth-promoting bacteria and mycorrhizal fungi, whereas others such as parasites or pathogenic microorganisms can dramatically reduce plant growth and yield (39,64). Of the biotic factors that have an impact on plants achieving yield potential, plant parasitic nematodes (PPNs) are among the most important.…”

Section: Introductionmentioning

confidence: 99%

Advances in Understanding the Molecular Mechanisms of Root Lesion Nematode Host Interactions

Fosu-Nyarko

Jones

2016

Annu. Rev. Phytopathol.

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Root lesion nematodes (RLNs) are one of the most economically important groups of plant nematodes. As migratory endoparasites, their presence in roots is less obvious than infestations of sedentary endoparasites; nevertheless, in many instances, they are the major crop pests. With increasing molecular information on nematode parasitism, available data now reflect the differences and, in particular, similarities in lifestyle between migratory and sedentary endoparasites. Far from being unsophisticated compared with sedentary endoparasites, migratory endoparasites are exquisitely suited to their parasitic lifestyle. What they lack in effectors required for induction of permanent feeding sites, they make up for with their versatile host range and their ability to move and feed from new host roots and survive adverse conditions. In this review, we summarize the current molecular data available for RLNs and highlight differences and similarities in effectors and molecular mechanisms between migratory and sedentary endoparasitic nematodes.

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Not to be suppressed? Rethinking the host response at a root-parasite interface

Cited by 20 publications

References 61 publications

Quantifying the economic cost of invertebrate pests to New Zealand’s pastoral industry

Quantifying the economic cost of invertebrate pests to New Zealand’s pastoral industry

Mutualistic root endophytism is not associated with the reduction of saprotrophic traits and requires a noncompromised plant innate immunity

Advances in Understanding the Molecular Mechanisms of Root Lesion Nematode Host Interactions

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