Nutritional constraints on displacement of Fusarium pseudograminearum from cereal straw by antagonists

Lakhesar, D.; Backhouse, David; Kristiansen, Paul

doi:10.1016/j.biocontrol.2010.09.002

Cited by 21 publications

(13 citation statements)

References 19 publications

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“…A key point to be taken into account is that the trophic status of many species known to be principally pathogenic or non-pathogenic is not definitive [65]. For instance, Alternaria infectoria is sometimes described as a pathogen of wheat [13, 66], sometimes as an endophyte [67], and has even been tested as a potential biocontrol agent against Fusarium pseudograminearum on wheat [68]. Crop residues, half-plant/half-soil, should be the focus of future studies aiming to disentangle the succession of microbial species with different lifestyles and to characterise their relative impacts on the development of currently minor, but potentially threatening diseases.…”

Section: Discussionmentioning

confidence: 99%

Crop residues in wheat-oilseed rape rotation system: a pivotal, shifting platform for microbial meetings

Kerdraon

Balesdent

Barret

et al. 2018

Preprint

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Crop residues are a crucial ecological niche with a major biological impact on agricultural ecosystems. In this study we used a combined diachronic and synchronic field experiment based on wheat-oilseed rape rotations to test the hypothesis that plant is a structuring factor of microbial communities in crop residues, and that this effect decreases over time with their likely progressive degradation and colonization by other microorganisms. We characterized an entire fungal and bacterial community associated with 150 wheat and oilseed rape residue samples at a plurennial scale by metabarcoding. The impact of plant species on the residue microbiota decreased over time and our data revealed turnover, with the replacement of oligotrophs, often plant-specific genera (such as pathogens) by copiotrophs, belonging to more generalist genera. Within a single cropping season, the plant-specific genera and species were gradually replaced by taxa that are likely to originate from the soil. These changes occurred more rapidly for bacteria than for fungi, known to degrade complex compounds. Overall, our findings suggest that crop residues constitute a key fully-fledged microbial ecosystem. Taking into account this ecosystem, that has been neglected for too long, is essential, not only to improve the quantitative management of residues, the presence of which can be detrimental to crop health, but also to identify groups of beneficial micro-organisms. Our findings are of particular importance, because the wheat-oilseed rape rotation, in which no-till practices are frequent, is particularly widespread in the European arable cropping systems.

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Section: Discussionmentioning

confidence: 99%

Crop residues in wheat-oilseed rape rotation system: a pivotal, shifting platform for microbial meetings

Kerdraon

Balesdent

Barret

et al. 2018

Preprint

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“…; Diamond and Cooke ; Singh Lakhesar et al . ). There are several studies of bacterial and fungal antagonists against the FHB pathogens, but control has often proved to be successful only under laboratory or climate chamber conditions (Laitila et al .…”

Section: Introductionmentioning

confidence: 97%

“…Some of them can coexist in ecological niches or are separated in time and space (Xu and Nicholson ; Singh Lakhesar et al . ). But, it is generally agreed that the interspecific competition in an ecosystem is the normal case rather than the exception (Fitt et al .…”

Section: Introductionmentioning

confidence: 97%

“…But, inter-and intraspecific microbial interactions, for instance, are essential to understand the process of infection and subsequent colonization of fusaria and their toxin production capability in planta in a natural environment. Until now, investigations of such interactions have focused on biocontrol (Laitila et al 2002;Diamond and Cooke 2003;Singh Lakhesar et al 2010). There are several studies of bacterial and fungal antagonists against the FHB pathogens, but control has often proved to be successful only under laboratory or climate chamber conditions (Laitila et al 2002;Naef et al 2006;He et al 2009) and failed completely under field conditions (Harman 2000).…”

Section: Introductionmentioning

confidence: 99%

“…Many plant pathogenic fungi compete with each other for nutrient uptake and for infection sites. Some of them can coexist in ecological niches or are separated in time and space (Xu and Nicholson 2009;Singh Lakhesar et al 2010). But, it is generally agreed that the interspecific competition in an ecosystem is the normal case rather than the exception (Fitt et al 2006;Xu and Nicholson 2009).…”

Section: Introductionmentioning

confidence: 99%

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Cocultivation of phytopathogenic Fusarium and Alternaria strains affects fungal growth and mycotoxin production

et al. 2012

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Aims A laboratory study was conducted to evaluate the influence of cocultivation of toxigenic Fusarium (F.) and Alternaria (A.) fungi with respect to growth and mycotoxin production. Methods and Results Fusarium culmorum Fc13, Fusarium graminearum Fg23 and two Alternaria tenuissima isolates (At18 and At220) were simultaneously or consecutively co‐incubated on wheat kernels in an in vitro test system. Fungal biomass was quantified by determining ergosterol content. Three Fusarium toxins (DON, NIV and ZON) and three Alternaria toxins (AOH, AME and ALT) were analysed by a newly developed HPLC/MS/MS method. In simultaneous cocultures, the fungal biomass was enhanced up to 460% compared with individual cultures; Alternaria toxins were considerably depressed down to <5%. Combining At18 and At220 with Fg23 inhibited the toxin production of both fungal partners. In contrast, Fc13 increased its DON and ZON production in competitive interaction with both A. strains. Conclusions The interfungal competitive effects aid the understanding of the processes of competition of both fungi in natural environments and the involvement of mycotoxins as antifungal factors. Significance and Impact of Study Cocultivation significantly affects fungal growth and mycotoxin production of phytopathogenic Alternaria and Fusarium strains. The impact of mycotoxins on the interfungal competition is highlighted.

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Natural Occurrence of Enantiomers of Organic Compounds Versus Phytoremediations: Should Research on Phytoremediations Be Revisited? A Mini‐review

et al. 2013

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Decontamination of polluted soils using plants is based on the ability of plant species (including transgenic plants) to enhance bioavailability of pollutants in the rhizosphere and support growth of pollutant-degrading microorganisms via root exudation and plant species-specific composition of the exudates. In this work, we review current knowledge of enantiomers of low-molecular-weight (LMW) organic compounds with emphasis on their use in phytoremediation. Many research studies have been performed to search for plants suitable for decontamination of polluted soils. Nevertheless, the natural occurrence of L- versus D-enantiomers of dominant compounds of plant root exudates which play different roles in the complexation of heavy metals, chemoattraction, and support of pollutant-degrading microorganisms were not included in these studies. D-enantiomers of aliphatic organic acids and amino acids or L-enantiomers of carbohydrates occur in high concentrations in root exudates of some plant species, especially under stress, and are less stimulatory for plants to extract heavy metals or for rhizosphere microflora to degrade pollutants compared with L-enantiomers (organic acids and amino acids) or D-carbohydrates. Determining the ratio of L- versus D-enantiomers of organic compounds as a criterion of plant suitability for decontamination of polluted soils and development of other types of bioremediation technologies need to be subjects of future research.

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Nutritional constraints on displacement of Fusarium pseudograminearum from cereal straw by antagonists

Cited by 21 publications

References 19 publications

Crop residues in wheat-oilseed rape rotation system: a pivotal, shifting platform for microbial meetings

Crop residues in wheat-oilseed rape rotation system: a pivotal, shifting platform for microbial meetings

Cocultivation of phytopathogenic Fusarium and Alternaria strains affects fungal growth and mycotoxin production

Natural Occurrence of Enantiomers of Organic Compounds Versus Phytoremediations: Should Research on Phytoremediations Be Revisited? A Mini‐review

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