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Ice Nucleation Induced by Pseudomonas syringae1

By Leroy R. Maki, Elizabeth L. Galyan, Mei-Mon Chang-Chien and Daniel R. Caldwell


Broth cultures of suspensions of Pseudomonas syringae isolated from decaying alder leaves (Alnus tenuifolia) were found to freeze at very warm (-1.8 to -3.8 C) temperatures. The initiation of freezing appears associated with the intact cell and not with extracellular material. Chemical treatments and physical destruction of the cell destroy activity. Bacteria must be in concentrations of approximately 106/ml before freezing at warm temperatures occurs

Topics: Environmental Microbiology and Ecology
Year: 1974
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Provided by: PubMed Central
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