The effects of temperature, salinity, and other factors on the growth and formation of UV-absorbing substances by the fungus Aspergillus.
Aspergillus niger can be grown at 263 degrees K in a KCl-saturated medium with glucose as the sole C-source. In spite of their similarities K and Rb-ions are not equivalent, but unlike Na-ion, both support growth. The dependency of growth rate upon the nitrogen source is peptone > NH4+ > NO3-. In KCl-medium at 263 degrees K, the production of UV-absorbing aromatic substances normally elaborated by this fungus and soluble in alcohol is reduced more than 20-fold as indicated by comparisons of total absorbance per unit dry weight in the range 210-280 nm. Both the low temperature and salt contribute to alterations in the chemistry of these potential photoprotectants.
Siegel
B Z
BZ
Pacific Biomedical Research Center, Department of Botany and Department of Chemistry, University of Hawaii, Honolulu 96822, USA.
Siegel
S M
SM
Phelan
J M
JM
D001234:Aspergillus niger / Q000187:drug effects / Q000254:growth & development* / Q000378:metabolism; D002712:Chlorides / Q000494:pharmacology*; D003080:Cold Temperature; D004305:Dose-Response Relationship, Drug; D004783:Environmental Microbiology; D005947:Glucose / Q000378:metabolism; D000432:Methanol; D009584:Nitrogen / Q000378:metabolism; D011189:Potassium Chloride / Q000494:pharmacology*; D011837:Radiation-Protective Agents / Q000378:metabolism; D012413:Rubidium / Q000494:pharmacology*; D013172:Spores, Fungal / Q000187:drug effects / Q000254:growth & development / Q000378:metabolism; D013395:Sucrose / Q000378:metabolism; D014466:Ultraviolet Rays
D002712:Chlorides; D011837:Radiation-Protective Agents; D013395:Sucrose; D011189:Potassium Chloride; D005947:Glucose; D012413:Rubidium; C032710:rubidium chloride; D009584:Nitrogen; D000432:Methanol