Summary
A bioaerosol research chamber was constructed and used to evaluate wind-gust release of previously depositedPseudomonas syringae, spores ofBacillus subtilis var.niger, and fluorescent microspheres (FM) on oat plants, and the airborne survival of the releasedP. syringae. Observations of wind gusts on the releasedBacillus spores and FM showed they had similar particle size distributions and therefore FM could act as bacterial sized surrogates in particle dispersion. Microscopic examination of the released FM containing particles revealed that 84% were associated with either fungal spores and hyphae were epiphytic on the plant, or with plant and soil debris. The release rate ofBacillus spores decreased as the number of gusts experienced by the plants increased, with a greater proportion of larger particles removed. The larger the particle associated with the releasedP. syringae, the longer the bacteria survived.
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Lighthart, B., Shaffer, B.T., Marthi, B. et al. Artificial wind-gust liberation of microbial bioaerosols previously deposited on plants. Aerobiologia 9, 189–196 (1993). https://doi.org/10.1007/BF02066261
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DOI: https://doi.org/10.1007/BF02066261