Endophytes from wheat as biocontrol agents against tan spot disease

Larrán, S.; Simón, Marı́a Rosa; Moreno, María Virginia; Siurana, María Pilar Santamarina; Perelló, A. E.

doi:10.1016/j.biocontrol.2015.09.002

Cited by 122 publications

(68 citation statements)

References 43 publications

(57 reference statements)

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“…Many fungi produce melanins to protect cells against environmental factors such as visible and ultraviolet light, lytic enzymes, toxic metals and antagonistic microorganisms (Butler et al, 2009). Therefore the formation of pigments in C. acutatum mycelium may be a mechanism of the pathogen to protect hyphae from the antagonistic fungi by preventing access by cell wall degrading enzymes, a finding also reported by others (Larran et al, 2016). The lack of significant correlation between the sources of investigated fungal isolates (i.e.…”

Section: Discussionmentioning

confidence: 64%

Fungal community in olive fruits of cultivars with different susceptibilities to anthracnose and selection of isolates to be used as biocontrol agents

et al. 2017

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A B S T R A C TOlive anthracnose is an important fruit disease in olive crop worldwide. Because of the importance of microbial phyllosphere to plant health, this work evaluated the effect of cultivar on endophytic and epiphytic fungal communities by studying their diversity in olives of two cultivars with different susceptibilities to anthracnose. The biocontrol potency of native isolates against Colletotrichum acutatum, the main causal agent of this disease, was further evaluated using the dual-culture method. Fungal community of both cultivars encompassed a complex species consortium including phytopathogens and antagonists. Host genotype was important in shaping endophytic but not epiphytic fungal communities, although some host-specific fungal genera were found within epiphytic community. Epiphytic and endophytic fungal communities also differed in size and in composition in olives of both cultivars, probably due to differences in physical and chemical nature of the two habitats. Fungal tested were able to inhibited C. acutatum growth (inhibition coefficients up to 30.9), sporulation (from 46 to 86%) and germination (from 21 to 74%), and to caused abnormalities in pathogenic hyphae. This finding could open opportunities to select specific beneficial microbiome by selecting particular cultivar and highlighted the potential use of these fungi in the biocontrol of olive anthracnose.

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Section: Discussionmentioning

confidence: 64%

Fungal community in olive fruits of cultivars with different susceptibilities to anthracnose and selection of isolates to be used as biocontrol agents

et al. 2017

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“…Microsphaeropsis sp., which is also known to have mycoparasitic capacity (Benyagoub et al, 1998), has been shown to affect the production of Fusarium graminearum spores on wheat and maize residues (Bujold et al, 2001;Legrand et al, 2017). Bastian et al (2009) highlighted the colonization of sterile residues deposited back on the soil by bacteria such as Pseudomonas fluorescens, Pseudomonas aurantiaca and Pseudomonas putida and fungi such as Chaetomium globosum, which have been described as potential biocontrol agents (Clarkson and Lucas, 1993;Cordero et al, 2014;Flaishman et al, 1996;Kildea et al, 2008;Larran et al, 2016;Perello et al, 2002;Pfender et al, 1993;Ramarathnam and Dilantha Fernando, 2006).…”

Section: Residue Microbiota and The Interface Between The Plant And Smentioning

confidence: 99%

Microbiomes and Pathogen Survival in Crop Residues, an Ecotone Between Plant and Soil

Kerdraon

Laval

Suffert

2019

Phytobiomes Journal

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The negative contribution of crop residues as a source of inoculum for plant diseases is well established. However, microbial ecologists have long reported positive effects of residues on the stability of agrosystems and conservation tillage practices have become increasingly widespread. Most studies have suggested that large microbial communities should be taken into account in plant disease management, but we know little about their ecological interaction with pathogens in the crop residue compartment. This review focuses on microbiomes associated with residues within the context of other microbial habitats in cereal-producing agroecosystems such as phyllosphere or rhizosphere. We connect residue microbiome with the survival of residue-borne fungal plant pathogens, thus combining knowledge in microbial ecology and epidemiology, two disciplines still not sufficiently connected. We provide an overview of the impact of residues on cereal disease epidemics and how dynamic interactions between microbial communities of non-buried residues during their degradation, along with soil and multitude of abiotic factors, can contribute to innovative disease management strategies, including next-generation microbiome-based biocontrol strategies. Starting from the classical but still relevant view of crop residues as a source of pathogen inoculum, we first consider possibilities for limiting the amount of residues on the soil surface to reduce the pathogen pressure. We then describe residues as a transient half-plant/half-soil compartment constituting a key fully fledged microbial ecosystem: in other words, an ecotone which deserves special attention. We focus on microbial communities, the changes in these communities over time and the factors influencing them. Finally, we discuss how the interactions between the microbial communities and the pathogens present on residues could be used: identification of keystone taxa and beneficial assemblages, then preservation of these taxa by adapted agronomic practices or development of synthetic communities, rather than the introduction of a single exogenous biocontrol species designed as a "treatment product".

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“…By solubilizing minerals such as phosphorus, and by producing plant growth regulators (hormones) and siderophores, endophytes are able to directly impact plant growth (Larran et al . ). A total of 86 isolates produced indole acetic acid (IAA), accounting for 67·2% of the total 128 Bacillus antagonists.…”

Section: Resultsmentioning

confidence: 97%

Novel screening strategy reveals a potent Bacillus antagonist capable of mitigating wheat take-all disease caused by Gaeumannomyces graminis var. tritici

Zhang

Guo

Wang

et al. 2017

Lett Appl Microbiol

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Take-all, which is caused by the soilborne fungal pathogen Gaeumannomyces graminis var. tritici (Ggt), is one of the most widespread and devastating root diseases of wheat plants. This study focuses on a novel screening strategy of Bacillus isolates to evaluate their potential biological control capacity for suppressing wheat take-all. The joint assessment of antifungal activities, growth promotion factors and variety of antibiotic synthesis genes, in addition to greenhouse experiments, allowed for the identification and demonstration of the Bacillus isolate Pnf-12 as an effective disease control agent.

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Endophytes from wheat as biocontrol agents against tan spot disease

Cited by 122 publications

References 43 publications

Fungal community in olive fruits of cultivars with different susceptibilities to anthracnose and selection of isolates to be used as biocontrol agents

Fungal community in olive fruits of cultivars with different susceptibilities to anthracnose and selection of isolates to be used as biocontrol agents

Microbiomes and Pathogen Survival in Crop Residues, an Ecotone Between Plant and Soil

Novel screening strategy reveals a potent Bacillus antagonist capable of mitigating wheat take-all disease caused by Gaeumannomyces graminis var. tritici

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