Yield Loss in Cereals, Caused by <i>Fusarium culmorum</i> and <i>F. pseudograminearum,</i> Is Related to Fungal DNA in Soil Prior to Planting, Rainfall, and Cereal Type

Hollaway, Grant; Evans, Margaret L.; Wallwork, H.; Dyson, C. B.; McKay, Alan

doi:10.1094/pdis-09-12-0867-re

Cited by 64 publications

(58 citation statements)

References 26 publications

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“…stem browning and white head formation) in both wheat and barley. In addition, a negative correlation was found between FCR inoculum levels and grain yield (Hollaway et al ., ). However, as expected, FCR inoculum levels prior to sowing are not the only factor influencing FCR disease incidence.…”

Section: Fusarium Crown Rot Managementmentioning

confidence: 97%

“…Given that F. pseudograminearum survives in colonized plant debris, the level of fungal inoculum already present in the field before sowing can be an indicator of the FCR incidence of the subsequent year. Several polymerase chain reaction (PCR) and quantitative PCR (qPCR) protocols have been developed to estimate the levels of FCR inoculum present in the soil or stubble (Evans et al, 2010;Hogg et al, 2007Hogg et al, , 2010Hollaway et al, 2013;Knight and Sutherland, 2017;Poole et al, 2015;Williams et al, 2002). In South Australia and Victoria, the levels of F. pseudograminearum and F. culmorum inocula found in the field prior to the planting season were positively correlated with FCR disease expression (e.g.…”

Section: Disease Predictionmentioning

confidence: 99%

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Fusarium crown rot caused by Fusarium pseudograminearum in cereal crops: recent progress and future prospects

Kazan

Gardiner

2018

Molecular Plant Pathology

201

158

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Diseases caused by Fusarium pathogens inflict major yield and quality losses on many economically important plant species worldwide, including cereals. Fusarium crown rot (FCR), caused by Fusarium pseudograminearum, is a cereal disease that occurs in many arid and semi-arid cropping regions of the world. In recent years, this disease has become more prevalent, in part as a result of the adoption of moisture-preserving cultural practices, such as minimum tillage and stubble retention. In this pathogen profile, we present a brief overview of recent research efforts that have not only advanced our understanding of the interactions between F. pseudograminearum and cereal hosts, but have also provided new disease management options. For instance, significant progress has been made in the genetic characterization of pathogen populations, the development of new tools for disease prediction, and the identification and pyramiding of loci that confer quantitative resistance to FCR in wheat and barley. In addition, transcriptome analyses have revealed new insights into the processes involved in host defence. Significant progress has also been made in understanding the mechanistic details of the F. pseudograminearum infection process. The sequencing and comparative analyses of the F. pseudograminearum genome have revealed novel virulence factors, possibly acquired through horizontal gene transfer. In addition, a conserved pathogen gene cluster involved in the degradation of wheat defence compounds has been identified, and a role for the trichothecene toxin deoxynivalenol (DON) in pathogen virulence has been reported. Overall, a better understanding of cereal host-F. pseudograminearum interactions will lead to the development of new control options for this increasingly important disease problem. Taxonomy: Fusarium pseudograminearum O'Donnell & Aoki; Kingdom Fungi; Phylum Ascomycota; Subphylum Pezizomycotina; Class Sordariomycetes; Subclass Hypocreomycetidae; Order Hypocreales; Family Nectriaceae; Genus Fusarium. Disease symptoms: Fusarium crown rot caused by F. pseudograminearum is also known as crown rot, foot rot and root rot. Infected seedlings can die before or after emergence. If infected seedlings survive, typical disease symptoms are browning of the coleoptile, subcrown internode, lower leaf sheaths and adjacent stems and nodal tissues; this browning can become evident within a few weeks after planting or throughout plant development. Infected plants may develop white heads with no or shrivelled grains. Disease symptoms are exacerbated under water limitation. Identification and detection: Fusarium pseudograminearum macroconidia usually contain three to five septa (22-60.5 × 2.5-5.5 μm). On potato dextrose agar (PDA), aerial mycelia appear floccose and reddish white, with red or reddish-brown reverse pigmentation. Diagnostic polymerase chain reaction (PCR) tests based on the amplification of the gene encoding translation elongation factor-1a (TEF-1a) have been developed for molecular identification. Host range: All maj...

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Section: Fusarium Crown Rot Managementmentioning

confidence: 97%

Section: Disease Predictionmentioning

confidence: 99%

Fusarium crown rot caused by Fusarium pseudograminearum in cereal crops: recent progress and future prospects

Kazan

Gardiner

2018

Molecular Plant Pathology

201

158

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“…The annual average yield losses due to this disease in bread wheat have been subsequently estimated to be 10-35%, and inoculation reduced the yield losses as much as 61% in the PNW region of the United States in seasons when the environmental conditions permitted artificial inoculation with F. pseudograminearum (Smiley et al, 2005b). In Australia, up to 85% of the yield loss was caused by planting cereal seed inoculated with a macroconidia suspension (Hollaway et al, 2013). In addition, the FCR disease may lead to the contamination of wheat stubble grain by mycotoxin trichothecenes nivalenol (NIV) and deoxynivalenol (DON) (Mudge et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

Diversity of theFusariumpathogens associated with crown rot in the Huanghuai wheat‐growing region of China

Zhou

Wang

et al. 2019

Environmental Microbiology

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Summary To investigate the distribution and diversity of the pathogens associated with Fusarium crown rot in the Huanghuai wheat‐growing region (HHWGR) of China, we collected wheat samples with symptomatic stem bases from seven provinces in the HHWGR between 2013 and 2016. A total of 1196 isolates obtained from 222 locations were identified as 9 Fusarium species based on morphological and molecular identification. Of these pathogen species, F. pseudograminearum was the dominant species. Furthermore, F. sinensis was isolated from the disease specimens and tested for virulence to wheat. The result of the pathogenicity revealed that an intraspecific differentiation existed in F. pseudograminearum; sequence analysis of the EF‐1α gene showed that 194 F. pseudograminearum isolates were differentiated into two distinct clades which closed to the strains from Australia and China respectively, but neither pathogenicity nor EF‐1α sequence was related to the geographic origins of these isolates. However, universal rice primers‐polymerase chain reaction showed a correlation with the geographical origins of the 194 isolates, which were divided into eight subclusters, the level of genetic diversity was higher within a geographical population than among the different populations. The results of these analyses can be directly used to facilitate disease monitoring and development of control strategies.

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“…In the case of a severe attack, blighted heads (shrivelled or no grains) are scattered in the field, easily observed when the wheat is still immature. Damage caused by FRR may cause up to 50% production loss (Hollaway et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Fusarium species and chemotypes associated with fusarium head blight and fusarium root rot on wheat in Sardinia

et al. 2015

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Environmental conditions in Sardinia (Tyrrhenian Islands) are conducive to fusarium root rot (FRR) and fusarium head blight (FHB). A monitoring survey on wheat was carried out from 2001 to 2013, investigating relations among these diseases and their causal agents. FHB was more frequently encountered in the most recent years while FRR was constantly present throughout the monitored period. By assessing the population composition of the causal agents as well as their genetic chemotypes and EF-1a polymorphisms, the study examined whether the two diseases could be differentially associated to a species or a population. Fusarium culmorum chemotypes caused both diseases and were detected at different abundances (88% 3-ADON, 12% NIV). Fusarium graminearum (15-ADON genetic chemotype) appeared only recently (2013) and in few areas as the causal agent of FHB. In F. culmorum, two haplotypes were identified based on an SNP mutation located 34 bp after the first exon of the EF-1a partial sequence (60% adenine, 40% thymine); the two populations did not segregate with the chemotype but the A-haplotype was significantly associated with FRR in the Sardinian data set (P = 0Á001), suggesting a possible fitness advantage of the A-haplotype in the establishment of FRR that was neither dependent on the sampling location nor the sampling year. The SNP determining the Sardinian haplotype is distributed worldwide. The question whether the A-haplotype segregates with characters facilitating FRR establishment will require further validation on a specifically sampled international data set.

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Yield Loss in Cereals, Caused by Fusarium culmorum and F. pseudograminearum, Is Related to Fungal DNA in Soil Prior to Planting, Rainfall, and Cereal Type

Cited by 64 publications

References 26 publications

Fusarium crown rot caused by Fusarium pseudograminearum in cereal crops: recent progress and future prospects

Fusarium crown rot caused by Fusarium pseudograminearum in cereal crops: recent progress and future prospects

Diversity of theFusariumpathogens associated with crown rot in the Huanghuai wheat‐growing region of China

Fusarium species and chemotypes associated with fusarium head blight and fusarium root rot on wheat in Sardinia

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