Golden, Cyanobacterial Heterocysts
. Cold Spring Harbor Prospect.
The result showed psammoma bodies and some heterocyst
. We considered it as micropapillary carcinomas.
Several studies depicted that B is involved in increasing the absorption of N through fixation in heterocyst
During HSP there was predominance of filamentous species with heterocyst
, comprising MBFG III.
Cyanobacteria are morphologically diverse and they consist of unicellular, colonial, pseudofilamentous, pseudoparenchymatous uniseriate, filamentous forms unbranched, undifferentiated, differentiated with specialized cells called heterocyst
and akinetes and heterotrichous branched forms .
was confirmed by re-association experiments.
In more complex species, the two processes are separated by space, with dinitrogen fixation occurring only in specialized cells (heterocysts
) within filaments.
The heterocystous cyanobacteria are distinguished by the ability to fix atmospheric nitrogen in specialized cells called heterocysts
. A group of 21 strains comprising members of the heterocystous cyanobacteria (Subsection IV and V) and 3 outgroup strains from Subsection I, II and III were used for phylogenetic analysis.
N-fixation, which is performed in specialized cells called heterocysts
This limitation leads to the development of cyanobacteria, some of which can fix atmospheric nitrogen while others, though lacking heterocysts
, are superior competitors (Sevrin-Reysacc and Pletikosic 1990).
Aphanizomenon flos-aquae grows in filaments of 8-50 cells; some of these cells specialize to heterocysts
and are capable of [N.sub.2]-fixation.