Affiliation:
1. Institute of Microbiology, Rutgers, The State University, New Brunswick, New Jersey
Abstract
Bartnicki-Garcia
, S. (Rutgers, The State University, New Brunswick, N. J.)
and Walter J. Nickerson
. Induction of yeastlike development in
Mucor
by carbon dioxide. J. Bacteriol.
84:
829–840. 1962—Vegetative development of
Mucor rouxii
may follow either one of two patterns of morphogenesis (mold-yeast dimorphism), depending on the atmosphere of incubation. Under air or N
2
, a filamentous (moldlike) growth developed, commonly followed by fragmentation of hyphae into spherical cells (arthrospores). Introduction of CO
2
into an anaerobic atmosphere induced development of spherical, budding yeastlike cells. Anaerobically, a pCO
2
of 0.3 atm or higher produced a purely yeastlike development. Presence of oxygen annulled the effect of CO
2
On germination, spores gave rise directly to either type of vegetative development, depending on the atmosphere of incubation. Induction of yeastlike development by CO
2
occurred in five strains of
M. rouxii
, and in most species of
Mucor
tested.
M. subtilissimus
, however, did not require CO
2
; it developed in the yeastlike form under anaerobic conditions. Strains of
Rhizopus
grew under CO
2
, but developed only filamentous mycelium. Members of other genera of
Mucorales
were unable to grow under an atmosphere of CO
2
.
Publisher
American Society for Microbiology
Subject
Molecular Biology,Microbiology
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