Online citations, reference lists, and bibliographies.
← Back to Search

The Heterocysts Of Blue-green Algae II. Details Of Ultrastructure

N. J. Lang, P. Fay
Published 1971 · Biology

Save to my Library
Download PDF
Analyze on Scholarcy Visualize in Litmaps
Reduce the time it takes to create your bibliography by a factor of 10 by using the world’s favourite reference manager
Time to take this seriously.
Get Citationsy
Heterocysts of Anabaena cylindrica in intact filaments or separated from vegetative cells were examined using improved methods of fixation with glutaraldehyde followed by potassium permanganate or osmium tetroxide. The heterocyst envelope, formed external to the outer layer (LIV) of the pre-existing cell wall, is composed of three distinct layers, i.e. the inner laminated, the middle homogeneous and the outermost fibrous layers. These layers are absent at the narrow point of contact between heterocyst and vegetative cell. Here the septum appears to be traversed by microplasmodesmata interconnecting the plasmalemmas of the heterocyst and adjacent vegetative cell. In addition to the characteristic reorganization of thylakoids an extensive membrane elaboration was observed in the heterocysts. This takes the form of dense layering and, frequently, coiling and leads to a marked increase of the membrane surface area within the cell. The heavily contorted membranes beneath the pore channel undergo some change in structure resulting in an appearance of membrane disintegration and in the gradual accumulation of an electron opaque material within the pore channel. The possible significance of the observed structural changes is discussed in relation to the suggested role of heterocysts in nitrogen fixation and to the interrelations between heterocysts and vegetative cells.
This paper references

This paper is referenced by
Cell-cell communication through septal junctions in filamentous cyanobacteria.
Ann-Katrin Kieninger (2021)
Molecular Aspects and Oxygen Relations of Nitrogen Fixation in Cyanobacteria
D. Upadhyay (2021)
Carbon Transfer from the Host Diatom Enables Fast Growth and High Rate of N2 Fixation by Symbiotic Heterocystous Cyanobacteria
K. Inomura (2020)
Metalloproteins in the Biology of Heterocysts
R. Pernil (2019)
Genetic responses to carbon and nitrogen availability in Anabaena.
A. Herrero (2019)
Structure and Function of a Bacterial Gap Junction Analog
Gregor L Weiss (2019)
Assessing patterns of morphological and physiological trait variations across heterocytous cyanobacteria at cellular and population levels
Lilen Yema (2018)
Mechanisms for Protein Redistribution in Thylakoids of Anabaena During Cell Differentiation
Cyanobacterial Septal Junctions: Properties and Regulation
E. Flores (2018)
Heterocyst Pattern Formation Responds to N 2 Partial Pressure in Anabaena cylindrica PCC 7122 but not in Anabaena variabilis
Shaelyn N Silverman (2018)
Production of Heterocyst Glycolipids and Glycerol Dialkyl Glycerol Tetraether membrane lipids in the water column of a stratified tropical lake, Malawi, Africa
D. M. Kumar (2017)
The multicellular nature of filamentous heterocyst-forming cyanobacteria.
A. Herrero (2016)
Thylakoid membrane function in heterocysts.
A. Magnuson (2016)
Enabling cell–cell communication via nanopore formation: structure, function and localization of the unique cell wall amidase AmiC2 of Nostoc punctiforme
Felix M. Büttner (2016)
Thylakoid Development and Galactolipid Synthesis in Cyanobacteria.
K. Awai (2016)
Overexpression of SepJ alters septal morphology and heterocyst pattern regulated by diffusible signals in Anabaena
V. Mariscal (2016)
Modulation of the bacterial cell wall by N‐acetylmuramoyl‐L‐alanine amidases
F. Büttner (2016)
Nitrogen fixing cyanobacteria: their diversity, ecology and utilisation with special reference to rice cultivation
S. Kulasooriya (2016)
Requirement of Fra proteins for communication channels between cells in the filamentous nitrogen-fixing cyanobacterium Anabaena sp. PCC 7120
Amin Omairi-Nasser (2015)
Divisome‐dependent subcellular localization of cell–cell joining protein SepJ in the filamentous cyanobacterium Anabaena
Félix Ramos-León (2015)
Chapter 4 – Filamentous Cyanobacteria
J. Komárek (2015)
Intercellular communication in filamentous cyanobacteria
Dennis J. Nürnberg (2015)
Carbon assimilation and accumulation of cyanophycin during the development of dormant cells (akinetes) in the cyanobacterium Aphanizomenon ovalisporum
A. Sukenik (2015)
Intercellular Diffusion of a Fluorescent Sucrose Analog via the Septal Junctions in a Filamentous Cyanobacterium
Dennis J. Nürnberg (2015)
Intercellular transfer along the trichomes of the invasive terminal heterocyst forming cyanobacterium Cylindrospermopsis raciborskii CS-505.
Álvaro M. Plominsky (2015)
Morphological traits in nitrogen fixing heterocytous cyanobacteria: possible links between morphology and eco-physiology
Paula de Tezanos Pinto (2015)
Requirement of Cell Wall Remodeling for Cell–Cell Communication and Cell Differentiation in Filamentous Cyanobacteria of the Order Nostocales
I. Maldener (2015)
The Architecture of Cyanobacteria, Archetypes of Microbial Innovation
Claire Ting (2014)
The Structural Basis of Biological Energy Generation
M. Hohmann-Marriott (2014)
Prokaryotic multicellularity: a nanopore array for bacterial cell communication
Josef Lehner (2013)
Regulation of photosynthesis during heterocyst differentiation in Anabaena sp. strain PCC 7120 investigated in vivo at single-cell level by chlorophyll fluorescence kinetic microscopy
N. Ferimazova (2013)
Chapter Eight – Gene Expression during Heterocyst Differentiation
A. Herrero (2013)
See more
Semantic Scholar Logo Some data provided by SemanticScholar