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Last update: May 2021

Menu Logo Principal Plant pathology unit - INRA AVIGNON

Pathologie vegetale

Zone de texte éditable et éditée et rééditée

Life history

Botrytis cinerea in non-agricultural habitats

Isolation of B. cinerea on Petri plates containing the semi-selective Botrytis spore trap medium

Isolation of B. cinerea on Petri plates containing

the semi-selective Botrytis spore trap medium

© Pathologie végétale - INRAE - PACA-Avignon

Our results suggest that highly diverse populations of this plant pathogen persist outside of agriculture in association with substrates other than plants and that this part of their life history is compatible with its capacity to maintain its potential as plant pathogen.

Bardin, M., Leyronas, C., Troulet, C., Morris, C. E. (2018). Striking similarities between Botrytis cinerea from non-agricultural and from agricultural habitats. Frontiers in Plant Science, 9, 1820. DOI : 10.3389/fpls.2018.01820 https://hal.inrae.fr/hal-01946288v1

  • Isolation of B. cinerea outside of agricultural fields, during 5 years in France
    • 235 samples of various substrates collected in France including rainfall, snowpack, river, and lake water, epilithic biofilms in mountain streams, leaf litter and plant debris, rock surfaces, bird feathers and healthy wild plants
  • Comparison of strains from crop plants (tomato, grape...) and strains from environmental substrates
    • phylogenetic comparisons based on sequences of 9 microsatellite markers
    • aggressiveness of strains on tomato stems
  • Results
    • all substrates except rock surfaces harbored B. cinerea
    • strains from crops and the environment could not be distinguished and genetic diversity of strains outside of agriculture was just as broad as within agriculture
    • mean disease severity caused by strains from environmental substrates was statistically identical to the severity of disease caused by strains from tomato, but was significantly greater than the severity caused by strains from grape or other crops