Phylogenetic Conundrum of the Mushroom-forming Fungi (Agaricomycetes)

Misra, J. K.; Tewari, J. P.; Deshmukh, S. K.

doi:10.1201/b11606-11

Cited by 34 publications

(48 citation statements)

References 52 publications

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“…infection levels in cereal seeds, as well as the increased levels of trichothecene contamination in cereal grains, observed in Norway in recent years (Bernhoft et al 2013). During the same period, members of the Fusarium graminearum species complex (FGSC) have become more prevalent in several European countries (Chandelier et al 2011;Jennings et al 2004;Stępień et al 2008;Waalwijk et al 2003) including the Nordic countries (Bernhoft et al 2010;Fredlund et al 2008;Nielsen et al 2011;Yli-Mattila 2010), partly replacing other Fusarium species.…”

Section: Introductionmentioning

confidence: 99%

Genetic and phenotypic diversity within the Fusarium graminearum species complex in Norway

et al. 2015

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As has been observed in several European countries, the frequency of Fusarium head blight (FHB) caused by members of the Fusarium graminearum species complex (FGSC) has increased in Norwegian cereals in recent years, resulting in elevated levels of deoxynivalenol in cereal grains. The objective of this study was to determine if this increase was associated with changes in FGSC composition within Norway. FGSC isolates collected from wheat, oats and barley in Norway during two periods, mainly 1993-1998 and 2004-2007, were characterized to determine species and trichothecene genotype composition and to assess levels of genetic variation and population structure. In vitro growth rates at different temperatures and aggressiveness in spring wheat were further characterized for a sub-selection of isolates. All Norwegian isolates were identified as F. graminearum. The 3-acetyl-deoxynivalenol (3-ADON) trichothecene type was dominant. However, isolates with the 15-ADON chemotype were detected in Norway for the first time and may represent a recent introduction of this trichothecene type. Bayesian-model based clustering and analyses of genetic differentiation indicated the persistence over the last 20 years of two sympatric and partially admixed populations of F. graminearum in Norway. Significant differences in average in vitro growth rates and aggressiveness were observed between these two populations. Our results demonstrate that the recent increase in prevalence of the FGSC in Norwegian cereals do not correspond to any dramatic changes in FGSC species or trichothecene chemotype composition. However, significant changes in population frequencies were observed among Norwegian F. graminearum.

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Section: Introductionmentioning

confidence: 99%

Genetic and phenotypic diversity within the Fusarium graminearum species complex in Norway

et al. 2015

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“…Root rot was assessed according to the infection scale of Al-Hamdany & Salih (1986) where (1) indicates slightly infected, (2) moderately infected and (3) highly infected roots. 7 Biddle & Cattlin, 2007;Conner et al, 2014) as well as on other crops such as cereals Yli-mattila, 2010). Hence, the severity of the disease incidence of F. culmorum revealed in this study urged us to search for an eco-friendly alternative based on faba bean root rhizospheric bacteria with the aim to initiate a fighting-strategy against the pathogen.…”

Section: Discussionmentioning

confidence: 99%

The bean rhizosphere Pseudomonas aeruginosa strain RZ9 strongly reduces Fusarium culmorum growth and infectiveness of plant roots

Haddoudi

Sendi

Batnini

et al. 2017

Span. j. agric. res.

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A faba bean rhizospheric Pseudomonas aeruginosa isolate RZ9 was used for studying its antifungal activity and protecting effects of faba bean and common bean against the root pathogen Fusarium culmorum strain MZB47. The dual culture tests showed that RZ9 inhibits MZB47 in vitro growth by 56%. When mixing RZ9 cell suspension with MZB47 macroconidia at equal proportion, the macroconidia viability was reduced with 70%. Pathogenicity tests conducted in sterile conditions showed that MZB47 caused an intense root rotting in faba bean 'Aquadulce' plantlets and a slight level in common bean 'Coco blanc'. This was associated to significant decreases in plant growth only in 'Aquadulce', reducing shoot dry weight (DW) by 82% and root DW by 70%. In soil samples, MZB47 caused severe root rotting and induced significant decreases in shoot DW (up to 51%) and root DW (up to 60%) for both beans. It was associated to a decrease in nodule number by 73% and 52% for faba bean and common bean, respectively. Biocontrol assays revealed that the inoculation of RZ9 to MZB47-treated plantlets enhanced shoot DWs (25% and 110%) and root DWs (29% and 67%), in faba bean and common bean, respectively. Moreover, root rotting levels decreased and nodule number increased in treated compared to untreated plantlets. Collected data highlighted the disease severity of F. culmorum and demonstrated the potential of using RZ9 in controlling Fusaria root diseases in beans. Thereby, the current study represents the first report on the biocontrol effectiveness of P. aeruginosa against F. culmorum in beans.Additional keywords: biocontrol; root rot; Vicia faba; Phaseolus vulgaris.

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“…F. incarnatum was more frequent in central Kenya and western Kenya soils. There are limited reports on this species with most associating it with cereals (Yli-Mattila, 2010).…”

Section: Fusarium Populations Under Green House and Field Conditionsmentioning

confidence: 99%

Occurrence of Arbuscular Mycorrhizal Fungi and Fusarium in TC Banana Rhizosphere Inoculated with Microbiological Products in Different Soils in Kenya

Onguso¹,

and²,

Njuguini³

et al. 2015

International J. of Soil Science

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The impact of microbiological commercial products (PHC Biopak, Rhizatech and ECO-T) on the occurrence of mycorrhizae and Fusarium in the rhizosphere of tissue culture banana (Gros Mitchel cv.) was assessed. Tissue cultured banana plantlets were inoculated with PHC Biopak (Bacillus), Rhizatech (mycorrhiza) and ECO-T (T. harzianum) under greenhouse conditions using a completely randomized design in a Vertisol, Rhodic Ferralsol and Humic Nitisol sampled from the major banana growing regions in Kenya. Potted plants were later established under field conditions in the three agro ecological zones. Roots and soils sampled at end of potting and at flowering were assessed for AM fungi colonization and Fusarium populations. The effect of product inoculation on AM fungi colonization varied and only significant (p<0.05) in Rhodic Ferralsol with Rhizatech increasing intensity of colonization by 31.9% and PHC Biopak increasing the frequency of colonization by 38.6% compared to the non-inoculated control (12.9%). F. oxysporum, fsp. cubense, F. proliferatum and F. incarnatum were recovered from the experimental soils. Foc was the most abundant in the three soils (prior to inoculation) accounting for 60.6% of all Fusarium colony forming units. After inoculation, at the end of potting stage and at flowering, F. proliferatum was mostly isolated from the three zones accounting for 35.2% of the total fungal population. Foc was isolated from Humic Nitisol and Vertisol accounting for 11.5% of the total fungal population. PHC Biopak, ECO-T and Rhizatech suppressed Foc colony forming units per gram of soil by 47, 68 and 55%, respectively in the Humic Nitisol. ECO-T reduced Fusarium colony forming units per gram of soil by 6% in Rhodic Ferralsol and PHC Biopak by 50% in Vertisol compared to the non-inoculated soils. There is potential in use of commercial microbiological products to suppress Foc and the efficacy of the products depends on soil physico-chemical properties.

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Phylogenetic Conundrum of the Mushroom-forming Fungi (Agaricomycetes)

Cited by 34 publications

References 52 publications

Genetic and phenotypic diversity within the Fusarium graminearum species complex in Norway

Genetic and phenotypic diversity within the Fusarium graminearum species complex in Norway

The bean rhizosphere Pseudomonas aeruginosa strain RZ9 strongly reduces Fusarium culmorum growth and infectiveness of plant roots

Occurrence of Arbuscular Mycorrhizal Fungi and Fusarium in TC Banana Rhizosphere Inoculated with Microbiological Products in Different Soils in Kenya

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