Abstract

A strain of Penicillium currently under study in this laboratory has revealed some unexpected features in response to salts and UV-radiation. These responses include: (a) stimulation of growth by one molar NaCl and KCl at 23° but not at 5°C, (b) total inhibition by LiCl and RbCl at 5° but not at 23°C, (c) stimulation by 254 nm radiation (2 x 106 erg·cm-2·min-1, 30–90 minutes) at 23° and 5°C, and (d) very elevated growth rates at 23° after incubation at 5°C.

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