Cell size and heterocyst differentiation in nostocacean blue-green algae.
Cytobios
; 28(109): 35-40, 1980.
Article
em En
| MEDLINE
| ID: mdl-6775879
ABSTRACT
Cell size variations in three heterocystous blue-green algae, viz. Nostoc muscorum (ISU strain), N. muscorum (UW strain) and N. calcicola (a local isolate) have been surveyed under conditions permissive and non-permissive of heterocyst differentiation. A monomodal distribution pattern was observed for the two strains of N. muscorum under conditions not requiring heterocyst differentiation, while elemental nitrogen grown cultures retained a group of relatively larger cells in addition to this mode. N. calcicola could not be similarly viewed because of the formation of hormogonia-like slender filaments causing heterogeneity. The heterocyst size showed two major peaks in each case, the larger heterocysts being almost twice as voluminous as the smaller ones. Attainment of a critical cell size, and the cell division which follows, may be crucial for making a cell differentiate into a heterocyst.
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01-internacional
Base de dados:
MEDLINE
Assunto principal:
Cianobactérias
Idioma:
En
Revista:
Cytobios
Ano de publicação:
1980
Tipo de documento:
Article