Changing fitness of a necrotrophic plant pathogen under increasing temperature

Global Change Biology
Rosalie SabburgSukumar Chakraborty

Abstract

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 this study, we have investigated the effect of increasing temperature on the pathogenic fitness of Fusarium pseudograminearum, an important necrotrophic plant pathogen associated with crown rot disease of wheat in Australia. Eleven wheat lines with different levels of crown rot resistance were artificially inoculated with F. pseudograminearum and maintained at four diurnal temperatures 15/15°C, 20/15°C, 25/15°C and 28/15°C in a controlled glasshouse. To quantify the success of F. pseudograminearum three fitness measures, these being disease severity, pathogen biomass in stem base and flag leaf node, and deoxynivalenol (DON) in stem base and flag leaf node of mature plants were used. F. pseudograminearum showed superior overall fitness at 15/15°C, and this was reduced with increasing temperature. Pathogen fitness was significantly influenced by the level of crown rot resistance of wheat lines, but the influence of line declined with increasing temperature. Lines that exhibited superior crown rot resistance in the field were generally associated with re...Continue Reading

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Citations

Jan 2, 2016·International Journal of Health Services : Planning, Administration, Evaluation·Daniel Martinez Garcia, Mary C Sheehan
Jul 17, 2021·Frontiers in Bioengineering and Biotechnology·Cathryn A O'SullivanLouise F Thatcher

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