scholarly journals Presence of the Weakly Pathogenic Fusarium poae in the Fusarium Head Blight Disease Complex Hampers Biocontrol and Chemical Control of the Virulent Fusarium graminearum Pathogen

2021 ◽  
Vol 12 ◽  
Author(s):  
Jiang Tan ◽  
Noémie De Zutter ◽  
Sarah De Saeger ◽  
Marthe De Boevre ◽  
Trang Minh Tran ◽  
...  
Keyword(s):  
Fusarium Head Blight ◽  
Control Strategies ◽  
Fusarium Species ◽  
Plant Diseases ◽  
Streptomyces Rimosus ◽  
Defense System ◽  
Head Blight ◽  
Disease Complex ◽  
Blight Disease ◽  
Multiple Pathogens

Fusarium head blight (FHB) in wheat (Triticum aestivum L.) is caused by a consortium of mutually interacting Fusarium species. In the field, the weakly pathogenic F. poae often thrives on the infection sites of the virulent F. graminearum. In this ecological context, we investigated the efficacy of chemical and biocontrol agents against F. graminearum in wheat ears. For this purpose, one fungicide comprising prothioconazole + spiroxamine and two bacterial biocontrol strains, Streptomyces rimosus LMG 19352 and Rhodococcus sp. R-43120 were tested for their efficacy to reduce FHB symptoms and mycotoxin (deoxynivalenol, DON) production by F. graminearum in presence or absence of F. poae. Results showed that the fungicide and both actinobacterial strains reduced FHB symptoms and concomitant DON levels in wheat ears inoculated with F. graminearum. Where Streptomyces rimosus appeared to have direct antagonistic effects, Rhodococcus and the fungicide mediated suppression of F. graminearum was linked to the archetypal salicylic acid and jasmonic acid defense pathways that involve the activation of LOX1, LOX2 and ICS. Remarkably, this chemical- and biocontrol efficacy was significantly reduced when F. poae was co-inoculated with F. graminearum. This reduced efficacy was linked to a suppression of the plant’s intrinsic defense system and increased levels of DON. In conclusion, our study shows that control strategies against the virulent F. graminearum in the disease complex causing FHB are hampered by the presence of the weakly pathogenic F. poae. This study provides generic insights in the complexity of control strategies against plant diseases caused by multiple pathogens.

scholarly journals At the scene of the crime: New insights into the role of weakly pathogenic members of the fusarium head blight disease complex

2020 ◽  
Vol 21 (12) ◽  
pp. 1559-1572
Author(s):  
Jiang Tan ◽  
Maarten Ameye ◽  
Sofie Landschoot ◽  
Noémie De Zutter ◽  
Sarah De Saeger ◽  
...  
Keyword(s):  
Fusarium Head Blight ◽  
Head Blight ◽  
Disease Complex ◽  
Blight Disease

scholarly journals Auxin as a player in the biocontrol of Fusarium head blight disease of barley and its potential as a disease control agent

2012 ◽  
Vol 12 (1) ◽  
pp. 224 ◽  
Author(s):  
Carloalberto Petti ◽  
Kathrin Reiber ◽  
Shahin S Ali ◽  
Margaret Berney ◽  
Fiona M Doohan
Keyword(s):  
Disease Control ◽  
Fusarium Head Blight ◽  
Control Agent ◽  
Head Blight ◽  
Blight Disease

Species and trichothecene genotype of pathogens causing Fusarium head blight of wheat in Nebraska, USA

2021 ◽  
Author(s):  
Esteban Valverde-Bogantes ◽  
Andreia Bianchini ◽  
Stephen Wegulo ◽  
Heather Hallen-Adams
Keyword(s):  
Fusarium Head Blight ◽  
Fusarium Species ◽  
Management Strategies ◽  
Elongation Factor ◽  
Head Blight ◽  
Single Spore ◽  
Additional Species ◽  
Growing Seasons ◽  
Worldwide Distribution ◽  
Pathogen Populations

Fusarium head blight (FHB) is an economically important disease caused by several Fusarium species affecting wheat and other small grain cereals. In recent years, reports of shifts in populations of FHB pathogens around the world have shown that these populations are dynamic and change continuously, often resulting in increased yield losses or changes in the mycotoxins produced in the grain, which highlights the need for increased vigilance. The objective of this research was to identify the species and trichothecene genotypes of FHB pathogens in Nebraska in order to monitor their populations and the major toxigenic risks in the state. A total of 74 single-spore Fusarium isolates were obtained from 42 FHB symptomatic wheat spikes collected from Nebraska fields during the growing seasons in 2015-2018. Most of the isolates were identified as F. graminearum (n=67) based on translation elongation factor 1α (TEF1), trichothecene 3-O-acetyltransferase (TRI101), and reductase (RED) sequences. Additional species included F. boothii (n=3), F. poae (n=2), F. acuminatum (n=1), and one isolate was an F. graminearum × F. boothii interspecific hybrid. All F. graminearum and F. boothii isolates had the 15-ADON trichothecene genotype. This study shows that F. graminearum is not the only pathogen causing FHB in Nebraska and helps expand knowledge on the worldwide distribution of F. boothii. The information obtained from this survey will be useful in developing effective FHB management strategies in Nebraska, since different pathogen populations can cause varying levels of disease intensity and can be selectively sensitive to management tactics.

scholarly journals Analysis of Genetic Factors Defining Head Blight Resistance in an Old Hungarian Wheat Variety-Based Mapping Population

Agronomy ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 1128
Author(s):  
Emese Varga-László ◽  
Katalin Puskás ◽  
Balázs Varga ◽  
Zsuzsanna Farkas ◽  
Ottó Veisz ◽  
...  
Keyword(s):  
Fusarium Head Blight ◽  
Genetic Factors ◽  
Mapping Population ◽  
Fusarium Species ◽  
Wheat Variety ◽  
Heading Date ◽  
Limiting Factors ◽  
Blight Resistance ◽  
Head Blight ◽  
Resistance Qtls

One of the most important limiting factors of high-quality wheat production is Fusarium head blight infection. The various Fusarium species not only may cause severe yield loss but—due to toxin production—the grains also might become unsuitable for animal and human nutrition. In the present research, our aim was to examine the Fusarium resistance of a special mapping population (’BKT9086-95/Mv Magvas’) and identify the genetic factors and chromosome regions determining the tolerance to Fusarium culmorum and Fusarium graminearum. The connection between the genetic background and the Fusarium head blight sensitivity was confirmed by the analysis of variance in the case of three markers, among which the co-dominant pattern of the gtac2 and gtac3 amplified fragment length polymorphism (AFLP) markers might indicate a marker development possibility. Consistently expressed quantitative trait loci (QTLs) were identified on the chromosomes 2A, 2B, 2D, 5A, and 7A. Loci linked to resistance were identified on 11 chromosomes. During the investigation of phenological and morphological traits (heading date, plant height, ear compactness) influencing the head blight resistance and the location of the resistance QTLs, the total overlap was found in the case of the region identified on chromosome 2D and partial overlap on chromosomes 2A and 2B. Whereas 5A may be a rare allelic variant of a novel QTL.

Hyperspectral quantification of wheat resistance to Fusarium head blight: comparison of two Fusarium species

2018 ◽  
Vol 152 (4) ◽  
pp. 869-884 ◽  
Author(s):  
E. Alisaac ◽  
J. Behmann ◽  
M. T. Kuska ◽  
H.-W. Dehne ◽  
A.-K. Mahlein
Keyword(s):  
Fusarium Head Blight ◽  
Fusarium Species ◽  
Head Blight

Use of solid phase microextraction coupled to capillary gas chromatography-mass spectrometry for screening Fusarium spp. based on their volatile sesquiterpenes

2010 ◽  
Vol 3 (2) ◽  
pp. 121-128 ◽  
Author(s):  
J. Girotti ◽  
I. Malbrán ◽  
G. Lori ◽  
M. Juárez
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Capillary Gas Chromatography ◽  
Solid Phase Microextraction ◽  
Solid Phase ◽  
Fusarium Species ◽  
Gas Chromatography Mass Spectrometry ◽  
Head Blight ◽  
Pampa Region ◽  
Blight Disease

Solid phase microextraction (SPME) coupled to capillary gas chromatography (CGC) and mass spectrometry (MS) was used to evaluate the use of fungal volatiles to discriminate Fusarium species from wheat cultivars in the Argentina pampa region. Monosporic fungal isolates were grown on rice in sealed containers for 1 week and volatile organic compounds (VOC) were sampled for 30 min from the head space by SPME and analysed by CGC and CGCMS. VOC profiles of Fusarium species F. graminearum, F. poae, F. equiseti, F. verticillioides and F. oxysporum were discriminated by comparison of their profiles in the elution zone corresponding to sesquiterpenes. Trichothecene-producer and non-trichothecene producer Fusarium species were separated by the presence of trichodiene in their VOC fingerprints. Within trichothecene-producers, F. graminearum, F. poae and F. equiseti differed on the structure of their volatile sesquiterpenes. This technique might be also helpful to detect F. graminearum, the major head blight disease-producing fungus in the region.

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