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GROWTH AND MATING OF GONZUM PECTORALE (VOLVOCALES) IN DEFINED MEDIA 1
Author(s) -
Stein Janet R.
Publication year - 1975
Publication title -
journal of phycology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.85
H-Index - 127
eISSN - 1529-8817
pISSN - 0022-3646
DOI - 10.1111/j.1529-8817.1975.tb04537.x
Subject(s) - biology , zygote , mating , mating type , isolation (microbiology) , zoology , reproductive isolation , botany , evolutionary biology , microbiology and biotechnology , genetics , population , embryo , gene , demography , embryogenesis , sociology
SUMMARY Growth in defined media of 32 populations of Gonium pectorale was studied to learn more about the sexual isolation reported for this species. The 23 populations containing both mating types ( + & ‐ ) were also studied for the ability to form zygotes in defined media. A preliminary study showed that some populations grew and reproduced sexually in a defined mineral medium, whereas others appeared to require exogenous organic materials for growth and/or zygote formation. The diverse reactions exhibited by the populations indicate physiological races which may explain, in part, the occurrence of sexual isolation .