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Open AccessJournal ArticleDOI

The origin of Flimmer in Saprolegnia, Dictyuchus, Synura and Cryptomonas.

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TLDR
The endoplasmic reticulum of Saprolegnia, Dictyuchus, Synura and Cryptomonas may contain tubules less than 20 nm in diameter that are morphologically similar to Flimmer hairs, which are attached to the flagellum sheath by a tapering end-piece.
Abstract
The endoplasmic reticulum of Saprolegnia, Dictyuchus, Synura and Cryptomonas may contain tubules less than 20 nm in diameter. In Saprolegnia these tubules have a maximum length of 1.6 µm, a wall of a single layer of colchicine-resistant, osmiophilic subunits, and a tapering end-piece. Flimmer hairs (flagellar hairs) are morphologically similar and are attached to the flagellum sheath by a tapering end-piece. It is suggested that Flimmer hairs are produced in cisternae of the endoplasmic reticulum of the above organisms. Cryptomonas bears 2 rows of Flimmer hairs on one flagellum and a single row of shorter ones on the other.

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Citations
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Journal ArticleDOI

The structure, origin, isolation, and composition of the tubular mastigonemes of the ochromonas flagellum

TL;DR: The structure, assembly, and composition of the extracellular hairs (mastigonemes) of Ochromonas are detailed in this report and the functionally anomalous role of mastigonememes in reversing flagellar thrust is discussed in relation to their distribution relative to flagella anatomy and to the plane of flageLLar undulations.
Book ChapterDOI

The Chloroplast Endoplasmic Reticulum: Structure, Function, and Evolutionary Significance

TL;DR: The chapter proves that the chloroplast of cryptomonads arose from a eukaryotic endosymbiont; and the nucleomorph has the major characteristics of a nucleus.
Journal ArticleDOI

The route of entry of cytoplasmically synthesized proteins into chloroplasts of algae possessing chloroplast ER

S.P. Gibbs
TL;DR: In cells of Ochromonas exposed to chloramphenicol or spectinomycin, the periplastidal reticulum proliferates markedly becoming several layers thick, presumably because the transport of cytoplasmically synthesized plastid proteins is slowed down when protein synthesis in the chloroplast is inhibited.
Journal ArticleDOI

Zoospore development in the oomycetes

TL;DR: The latest discoveries in the development and biology of the oomycete zoospore are discussed, which include chemotactic responses, electrotaxis, and autotaxis or autoaggregation to target new hosts for infection.
References
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Journal ArticleDOI

Methods for the enhancement of image detail and accentuation of structure in electron microscopy

Roy Markham, +2 more
- 01 May 1963 - 
TL;DR: Methods for increasing the amount of information obtainable from electron micrographs of virus particles by using a method of optical differentiation and an increase in resolution above that which is on the original plate.
Journal ArticleDOI

Microtubules and fibrils in the cytoplasm of coleus cells undergoing secondary wall deposition

TL;DR: This study has demonstrated the presence of two different cytoplasmic components which appear to be associated with the rapidly developing secondary wall: microtubular structures aligned in the cy toplasm adjacent to the secondary wall; and clusters of fibrillar elements within cisternae of the endoplasmic reticulum.
Journal ArticleDOI

Tubular and fibrillar components of mature and differentiating sieve elements.

TL;DR: Observations are compatible with the view that the contents of contiguous mature sieve elements, including the P-protein, are continuous through the sieve-plate pores and that fixing solutions denature the proteins in the pores.
Journal ArticleDOI

The ultrastructure of the chloroplasts of algae.

TL;DR: When cells of Ochromonas danica are fixed in potassium permanganate in order to resolve unit membrane structure, the chloroplast discs are seen to be collapsed internally as well as appressed together externally.
Journal ArticleDOI

Extracellular microtubules. The origin, structure, and attachment of flagellar hairs in Fucus and Ascophyllum antherozoids.

TL;DR: The regularity of attachment of mastigonemes to the flageLLar surface suggests that specific attachment sites are constructed on the plasma membrane during flagellar ontogeny.
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