Plants and Associated Soil Microbiota Cooperatively Suppress Plant-Parasitic Nematodes

Frontiers in Microbiology, Journal Year: 2020, Volume and Issue: 11

Published: Feb. 28, 2020

Disease suppressive soils with specific suppression of soil-borne pathogens and parasites have been long studied are most often microbiological origin. As for the plant-parasitic nematodes (PPN), which represent a huge threat to agricultural crops successfully defy many conventional control methods, soil progression from conducive state is accompanied by enrichment antagonistic microbial consortia. However, few groups come fore in diminishing PPN disease using culture-dependent methods. Studies cultured strains resulted understanding mechanisms antagonized microorganisms. Recent culture-independent studies on microbiome associated soil, plant roots, contributed better functional potential cohort. Plant root exudation an important pathway determining host-microbe communication plays key role selection set antagonists rhizosphere as first line defense against crop or parasites. Root exudates comprising primary metabolites such amino acids, sugars, organic secondary can also cause modifications nematode surface subsequently affect attachment. A positive interaction between hosts their beneficial microbiota correlated low performance host. In this review, we summarized historical records nematode-suppressive then focused more recent aspect, emphasizing advances studying nematode-microbe interactions over time. We highlighted biocontrol mechanisms, especially parasitism, induced systemic resistance, volatile compounds consortia, bacterial genera Pasteuria, Bacillus, Pseudomonas, Rhizobium, Streptomyces, Arthrobacter, Variovorax, fungal isolates Pochonia, Dactylella, Nematophthora, Purpureocillium, Trichoderma, Hirsutella, Arthrobotrys, Mortierella. discussed importance microorganisms, attachment subsequent events parasitism. Comprehensive plant-beneficial consortia underlying may help develop synthetic communities PPN, thereby reducing nematicides fertilizers inputs.

Language: Английский

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Beneficial microbes going underground of root immunity

Plant Cell & Environment, Journal Year: 2019, Volume and Issue: 42(10), P. 2860 - 2870

Published: July 29, 2019

Plant roots interact with an enormous diversity of commensal, mutualistic, and pathogenic microbes, which poses a big challenge to distinguish beneficial microbes from harmful ones. Plants can effectively ward off pathogens following immune recognition conserved microbe-associated molecular patterns (MAMPs). However, such elicitors are essentially not different those neutral that abundantly present in the root microbiome. Recent studies indicate plant system plays active role influencing rhizosphere microbiome composition. Moreover, it has become increasingly clear root-invading including rhizobia arbuscular mycorrhiza, evade or suppress host immunity establish mutualistic relationship their host. Evidence is accumulating many free-living microbiota members responses, highlighting suppression as important function Thus, gate keeping functions restricted warding but also extend microbiota, likely promote colonization by prevent growth-defense tradeoffs triggered MAMP-rich environment.

Language: Английский

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Coumarin Communication Along the Microbiome–Root–Shoot Axis

Trends in Plant Science, Journal Year: 2020, Volume and Issue: 26(2), P. 169 - 183

Published: Oct. 3, 2020

Language: Английский

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Root ethylene mediates rhizosphere microbial community reconstruction when chemically detecting cyanide produced by neighbouring plants

Microbiome, Journal Year: 2020, Volume and Issue: 8(1)

Published: Jan. 18, 2020

Abstract Background Stress-induced hormones are essential for plants to modulate their microbiota and dynamically adjust the environment. Despite emphasis of role phytohormone ethylene in plant physiological response heterospecific neighbour detection, less is known about how this activated signal mediates focal rhizosphere enhance fitness. Here, using 3 years peanut ( Arachis hypogaea L.), a legume, cyanide-containing cassava Manihot esculenta Crantz) intercropping monocropping field, pot hydroponic experiments addition exogenous application soil incubation experiments, we found that ethylene, cyanide-derived signal, associated with chemical identification neighbouring microbial re-assemblage rhizosphere. Results Ethylene production roots can be triggered by cyanide plants. This gaseous alters composition re-assembles co-occurrence network shifting abundance an actinobacterial species, Catenulispora sp., which becomes keystone intercropped The re-assembled provide more available nutrients support seed production. Conclusions Our findings suggest root acts as dual role. It plays perceiving biochemical cues from interspecific neighbours, also has regulatory function mediating assembly, thereby enhancing fitness improving discovery provides promising direction develop novel strategies targeted manipulations microbiome through signals.

Language: Английский

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Surviving in a Hostile World: Plant Strategies to Resist Pests and Diseases

Annual Review of Phytopathology, Journal Year: 2019, Volume and Issue: 57(1), P. 505 - 529

Published: Aug. 25, 2019

As primary producers, plants are under constant pressure to defend themselves against potentially deadly pathogens and herbivores. In this review, we describe short- long-term strategies that enable cope with these stresses. Apart from internal immunological involve physiological (epi)genetic modifications at the cellular level, also employ external rely on recruitment of beneficial organisms. We discuss along a gradient increasing timescales, ranging rapid immune responses initiated within seconds adaptations occur over multiple plant generations. cover latest insights into mechanistic evolutionary underpinnings present explanatory models. Finally, how knowledge short-lived model species can be translated economically ecologically important perennials exploit adaptive mitigate future impacts pests diseases in an increasingly interconnected changing world.

Language: Английский

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