-
Heterocysts or
heterocytes are
specialized nitrogen-fixing
cells formed during nitrogen starvation by some
filamentous cyanobacteria, such as Nostoc,...
- cyanobacteria, this
enzyme system is
housed in a
specialized cell
called the
heterocyst. The
production of the
nitrogenase complex is
genetically regulated, and...
- conditions,
vegetative cells differentiate into
heterocysts at
semiregular intervals along the filaments.
Heterocyst cells are
terminally specialized for nitrogen...
- host
through the
action of
terminally differentiated cells known as
heterocysts.
Nostoc is a
genus that
includes many
species that are
diverse in morphology...
- enveloped, thick-walled, non-motile,
dormant cell
formed by filamentous,
heterocyst-forming
cyanobacteria under the
order Nostocales and Stigonematales. Akinetes...
- that form
specialized cell
types in the
absence of
combined nitrogen (
heterocysts),
during unfavorable conditions (akinetes) or to
spread and initiate...
-
called heterocysts.
Heterocysts may also form
under the
appropriate environmental conditions (anoxic) when
fixed nitrogen is scarce.
Heterocyst-forming...
-
Illustration of "Cylindrospermum stagnale". h,
heterocyst; sp,
resting spore...
-
partially surrounded by a
gelatinous sheet. The
trichomes have a
basal heterocyst. Each
trichome has a
narrow aptic portion which is whip- or tail-like...
-
Within these fascicles,
heterocysts often appear at
various intervals on the trichomes. When
attached to a trichome,
heterocysts import carbohydrates which...
