Interactions of temperature and water potential in displacement of Fusarium pseudograminearum from cereal residues by fungal antagonists

Singh, Dalvinder Pal; Backhouse, David; Kristiansen, Paul

doi:10.1016/j.biocontrol.2008.10.015

Cited by 29 publications

(28 citation statements)

References 24 publications

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“…In agreement with Singh et al (2009) and quarter PDA in this study. These results are consistent with the temperature reported for optimal growth of the closely related species; F. graminearum and F. culmorum .…”

Section: Discussionsupporting

confidence: 81%

“…In the same study, the fungus appeared to also grow faster under drier conditions (-1 MPa and lower), however did not grow at 5 or 35 o C (Singh et al, 2009). These results appear to be similar to those reported earlier by Wearing and Burgess (1979) .…”

Section: Introductionsupporting

confidence: 81%

“…pseudograminearum has been reported across a fairly broad temperature range of 10-30 o C (Singh et al, 2009). In the same study, the fungus appeared to also grow faster under drier conditions (-1 MPa and lower), however did not grow at 5 or 35 o C (Singh et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

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Impact of increasing temperature on the fitness of Fusarium pseudograminearum causing crown rot in wheat

Sabburg¹

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Warmer temperatures associated with climate change are expected to have a direct impact on plant pathogens, challenging crops and altering plant disease profiles in the future. In Australia, the fungal pathogen Fusarium pseudograminearum associated with causing crown rot, a major disease in wheat, has been estimated to cost an average AUD$79 million in losses each year. In addition, Fusarium produces a variety of mycotoxins, such as the trichothecence deoxynivalenol (DON) in infected tissue. When produced in high concentration and consumed by animals and/or humans, DON can cause serious health effects. In Australia, a lack of knowledge regarding the effects of individual weather variables, such as temperature, on Fusarium crown rot has impeded the development of management plans to safeguard the wheat industry from disease under future climates. The experiments reported in this thesis were undertaken to: determine the effect of increasing temperature on the fitness, of F. pseudograminearum during the saprophytic and pathogenic stages of its lifecycle; explore the relationship between temperature and wheat line to determine if host resistance plays a part in influencing the overall pathogenic fitness of F.pseudograminearum; assess the impact of increasing temperature on crop growth and productivity of crown rot infected wheat lines; and to explore the relationship between different measures of pathogen fitness, and crop productivity and growth. Overall, there were significant correlations between most measures of crop growth and productivity of crown rot infected wheat. Furthermore, increasing disease severity was associated with a reduction in grain weight in this study.The results from these experiments have provided significant insight into the effects of increasing temperature on an important host-pathogen system in Australia. As the global mean surface temperature continues to rise over the 21st century, this study has shown Fusarium crown rot may be reduced with careful selection of host cultivars, and improved agronomic practices.IV

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Section: Discussionsupporting

confidence: 81%

Section: Introductionsupporting

confidence: 81%

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Impact of increasing temperature on the fitness of Fusarium pseudograminearum causing crown rot in wheat

Sabburg¹

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“…Fusarium-incited cereal diseases are therefore important for future food security (Chakraborty & Newton, 2011;Luck et al, 2011). Crop rotation and growing tolerant varieties are currently the most effective approaches to reducing Fusarium-incited diseases (Holloway & Exell, 2010;Singh et al, 2009a). However, demands to increase food production may compromise crop rotation strategies and levels of tolerance available against these diseases is mostly quantitative, making it difficult to use in breeding (Kazan et al, 2012).…”

Section: Fusarium Incited Diseases -An Overviewmentioning

confidence: 99%

Degradation of the benzoxazolinone class of phytoalexins by Fusarium pseudograminearum, a pathogenic fungus of wheat

Kettle¹

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The benzoxazolinone class of phytoalexins are released by wheat, maize and rye upon pathogen attack. Benzoxazolinones have antimicrobial activity, but certain fungi have evolved mechanisms to actively detoxify these compounds, which may contribute to the virulence of these pathogens. In many Fusarium spp. a cluster of genes is thought to be involved in the detoxification of benzoxazolinones. However, only one enzyme, Fusarium Detoxification of Benzoxazolinone 2 (Fdb2), encoded in the cluster has been unequi vocally assigned a role in this process. The FDB2 gene encodes a N-malonyltransferase and was identified in the maize pathogen F. verticillioides. In this thesis, through comparative genome analysis of several Fusarium species, a conserved genomic region has been identified around FDB2. Expression analyses demonstrated that a cluster of nine genes were responsive to exogenous benzoxazolinone in the important wheat pathogen Fusarium pseudograminearum.

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“…This increase in decomposition is attributed to a greater soil microbial activity in the warmer environment (Lakhesar et al, 2010, Singh et al, 2009. However future elevated atmospheric [CO 2 ] is likely to increase plant biomass production, and is therefore likely to return greater volumes of crop trash and stubble back to the soil (Chakraborty and Newton, 2011).…”

Section: Wheat Productivity Response To Rising Temperatures and Moistmentioning

confidence: 99%

The effect of CO2 and temperature on Fusarium crown rot incidence, severity, pathogen colonisation, toxigenic potential and host resistance in a selection of wheat germplasm

Melloy¹

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Rising atmospheric CO 2 may impact on host and pathogen interactions to the benefit or detriment of crop productivity. The wheat disease Fusarium crown rot (FCR), caused by the pathogen Fusarium pseudograminearum, is predicted to increase in incidence with rising CO 2 due to changes in wheat resistance. Fusarium spp.regularly reduce the quantity and quality of wheat yields around the globe. Reported here are a collection of studies which show FCR incidence and susceptibility in wheat plants is likely to increase in a future with higher atmospheric [CO 2 FCR resistance, susceptibility and crown rot induced crop losses through lower grain weight, were dependent on host genotype. On average genotype L2-120, 2-49, and Sunco showed the highest resistance to FCR while Tamaroi, Janz and Wyalkatchem showed the lowest resistance. Overall, increasing atmospheric [CO 2 ] is likely to lead to a greater build-up of FCR inoculum in wheat, encouraging an increased disease incidence in susceptible varieties of wheat. With greater FCR incidence and subsequent changes to toxin production is likely to boost DON in plant stems. From this research it is likely that e[CO 2 ] will lower crop productivity where FCR is present and negatively impact on the quantity and quality of future crop yields. The consequences of these changes may be mitigated through crop breeding programs with the purpose of developing wheat varieties with improved FCR resistance, FCR tolerance and the ability to detoxify DON mycotoxin.iv

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Interactions of temperature and water potential in displacement of Fusarium pseudograminearum from cereal residues by fungal antagonists

Cited by 29 publications

References 24 publications

Impact of increasing temperature on the fitness of Fusarium pseudograminearum causing crown rot in wheat

Impact of increasing temperature on the fitness of Fusarium pseudograminearum causing crown rot in wheat

Degradation of the benzoxazolinone class of phytoalexins by Fusarium pseudograminearum, a pathogenic fungus of wheat

The effect of CO2 and temperature on Fusarium crown rot incidence, severity, pathogen colonisation, toxigenic potential and host resistance in a selection of wheat germplasm

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