Plant Physiology 43:1279-1283 (1968)
© 1968 American Society of Plant Biologists
Articles
Carotenes and Retinal in Phycomyces Mutants 1
G. Meissner2 and
M. Delbruck
Division of Biology, California Institute of Technology, Pasadena, California 91109
Three different types of  -carotene mutants of Phycomyces have been studied. In 2 mutants (Type I) -carotene is still the principal carotene but scaled down or up relative to wild type. The carotene mixture of 2 mutants (Type II) consists mainly of phytoene and phytofluene. In Type III (2 mutants) -carotene is replaced by lycopene.
The examination of the mutants reveals that the receptor pigment is very likely neither -carotene nor retinal. Transmission spectra through the growing zone of live sporangiophores of 1 of these mutants which contains less than one-thousandth of the -carotene content of wild type show that the receptor pigment extinction is less than 0.003 at its maximum.
2 Postdoctoral Fellow of the Stiftung Volkswagenwerk.
1 Supported by Grant No. GB 4642x1 of the National Science Foundation.
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