Utility of microcosm studies for predicting phylloplane bacterium population sizes in the field.

摘要: Population sizes of two ice nucleation-active strains Pseudomonas syringae were compared on leaves in controlled environments and the field to determine ability microcosm studies predict plant habitat preferences field. The P. investigated parental recombinant deletion mutant deficient nucleation activity that had been tested for their control frost injury. population size was measured after inoculation at three locations up 40 same species studied growth chamber. There seldom a significant relationship between mean given strain incubated under either wet or dry conditions microcosms which could be recovered from when inoculated Specifically, some species, substantially greater than environment, while other populations significantly smaller those observed conditions. strains, however, frequently highly positively correlated with indigenous bacterial field, suggesting particular support introduced is its large bacteria enhance survival strains. Microcosm therefore seem most effective assessing possible differences environmental regime but are limited specific