Population dynamics of the Fusarium head blight biocontrol agent Cryptococcus flavescens OH 182.9 on wheat anthers and heads

Schisler, David A.; Core, Amanda B.; Boehm, Michael J.; Horst, Leona; Krause, C. R.; Dunlap, Christopher A.; Rooney, Alejandro P.

doi:10.1016/j.biocontrol.2013.11.011

Cited by 40 publications

(23 citation statements)

References 56 publications

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“…In fact, the yeast isolate Cryptococcus flavescens, strain OH 182.9, isolated from wheat anthers, reduced Fusarium disease severity and mycotoxin accumulation in wheat and furthermore increased kernel weight compared to the infected control [56,57]. This isolate was also observed to be able to colonize the abaxial surfaces of glume and lemma tissues [58], the same tissues where we observed them in higher abundance. Whether C. herbarum, H. takashimae or I. pannonica outcompete or prevent F. graminearum colonization of wheat spikes remains to be determined.…”

Section: Discussionsupporting

confidence: 49%

Fusarium Head Blight Modifies Fungal Endophytic Communities During Infection of Wheat Spikes

et al. 2019

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Fusarium head blight (FHB) is a devastating disease of wheat heads. It is caused by several species from the genus Fusarium. Several endophytic fungi also colonize wheat spikes asymptomatically. Pathogenic and commensal fungi share and compete for the same niche and thereby influence plant performance. Understanding the natural dynamics of the fungal community and how the pre-established species react to pathogen attack can provide useful information on the disease biology and the potential use of some of these endophytic organisms in disease control strategies. Fungal community composition was assessed during anthesis as well as during FHB attack in wheat spikes during 2016 and 2017 in two locations. Community metabarcoding revealed that endophyte communities are dominated by basidiomycete yeasts before anthesis and shift towards a more opportunistic ascomycete-rich community during kernel development. These dynamics are interrupted when Fusarium spp. colonize wheat spikes. The Fusarium pathogens appear to exclude other fungi from floral tissues as they are associated with a reduction in community diversity, especially in the kernel which they colonize rapidly. Similarly, the presence of several endophytes was negatively correlated with Fusarium spp. and linked with spikes that stayed healthy despite exposure to the pathogen. These endophytes belonged to the genera Cladosporium, Itersonillia and Holtermanniella. These findings support the hypothesis that some naturally occurring endophytes could outcompete or prevent FHB and represent a source of potential biological control agents in wheat.

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Section: Discussionsupporting

confidence: 49%

Fusarium Head Blight Modifies Fungal Endophytic Communities During Infection of Wheat Spikes

et al. 2019

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“…Biological control by antagonistic micro‐organisms, including yeasts, fungi and bacteria, appears to be a promising tool for preventing FHB and can be used as part of an integrated management of FHB (Khan and Doohan ; Schisler et al . ; Palazzini et al . , ).…”

Section: Introductionmentioning

confidence: 99%

Tolerance of triazole-based fungicides by biocontrol agents used to control Fusarium head blight in wheat in Argentina

Palazzini

Torres

Chulze

2018

Lett Appl Microbiol

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This study evaluates the possibility to use biocontrol agents (Bacillus velezensisRC 218, Brevibacillus sp. RC 263 and Streptomyces sp. RC 87B) in combination with triazole-based fungicides to control Fusarium head blight in wheat. The evaluation of biocontrol agents' growth under in vitro conditions was carried out in Petri dishes containing either prothioconazole, tebuconazole or metconazole. Viability studies demonstrated that B. velezensisRC 218 and Streptomyces sp. RC 87B were more tolerant to the fungicides evaluated. Results obtained reflect the possibility to use fungicides at low doses combined with biocontrol agents.

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“…However DON content was the same as control [137]. Later, the same group cultivated another strain, Cryptococcus flavescens OH 182.9, and applied it at early anthesis but found no effects on DON level [142].…”

Section: Mode Of Action Of Bcasmentioning

confidence: 88%

Biological Control of Mycotoxigenic Fungi and Their Toxins: An Update for the Pre-Harvest Approach

Abdallah¹,

Ameye²,

Saeger³

et al. 2019

Mycotoxins - Impact and Management Strategies

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Over recent decades, laboratory and field trial experiments have generated a considerable amount of data regarding the promising use of beneficial microorganisms to control plant diseases. Special attention has been paid to diseases caused by mycotoxigenic fungi owing to their direct destructive effect on crop yield and the potential production of mycotoxins, which poses a danger to animal and human health. New legislative initiatives to restrict the use of the existing commercial chemical pesticides have been an incentive for developing and registering new bio-pesticides. In this book chapter, we discuss up to-date preharvest biological control agents against mycotoxigenic fungi and their respective toxins. We will focus on the different modes of action of the most frequently studied biological control agents. Furthermore, a comprehensive overview on their ability to suppress mycotoxin biosynthesis will be discussed.

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Population dynamics of the Fusarium head blight biocontrol agent Cryptococcus flavescens OH 182.9 on wheat anthers and heads

Cited by 40 publications

References 56 publications

Fusarium Head Blight Modifies Fungal Endophytic Communities During Infection of Wheat Spikes

Fusarium Head Blight Modifies Fungal Endophytic Communities During Infection of Wheat Spikes

Tolerance of triazole-based fungicides by biocontrol agents used to control Fusarium head blight in wheat in Argentina

Biological Control of Mycotoxigenic Fungi and Their Toxins: An Update for the Pre-Harvest Approach

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