Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Architecture of the Golgi apparatus of a scale-forming alga: biogenesis and transport of scales
Autore:
Hawkins, EK; Lee, JJ;
Indirizzi:
CUNY City Coll, Dept Biol, New York, NY 10031 USA CUNY City Coll New YorkNY USA 10031 l, Dept Biol, New York, NY 10031 USA
Titolo Testata:
PROTOPLASMA
fascicolo: 3-4, volume: 216, anno: 2001,
pagine: 227 - 238
SICI:
0033-183X(2001)216:3-4<227:AOTGAO>2.0.ZU;2-K
Fonte:
ISI
Lingua:
ENG
Soggetto:
ELECTRON-MICROSCOPY; ANTEROGRADE TRANSPORT; NOV PRYMNESIOPHYCEAE; COMPLEX; ORGANIZATION; LOCALIZATION; VESICLES; CARTERAE; DYNAMICS; TUBULES;
Keywords:
Golgi apparatus; Pleurochrysis sp.; trans-Golgi network; algal-scale biogenesis; algal-scale transport; quantitative morphology;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
56
Recensione:
Indirizzi per estratti:
Indirizzo: Hawkins, EK CUNY City Coll, Dept Biol, 138Th St & Convent Ave, New York, NY 10031 USA CUNY City Coll 138Th St & Convent Ave New York NY USA 10031 SA
Citazione:
E.K. Hawkins e J.J. Lee, "Architecture of the Golgi apparatus of a scale-forming alga: biogenesis and transport of scales", PROTOPLASMA, 216(3-4), 2001, pp. 227-238

Abstract

Mechanisms of transport of secretory products across the Goigi apparatus (GA) as well as of scale formation in prymnesiophytes have remained controversial. We have used a quantitative morphological approach to study formation and transport of scales across the GA in haploid cells of Pleurochrysis sp. The GA of these cells differs from the GA of higher plants in at least six morphological characteristics. Our results show that scales form in the trans-Golgi network (TGN) and transit the TGN in heretofore unrecognized prosecretory vesicles. Prosecretory vesicles differentiate into secretory vesicles prior to exocytosis of scales to the cell surface. Because prosecretory vesicles are only fragments of TGN cisternae, the classical model of cisternal progression is not a valid mechanism of transport in this alga. TGN transport vesicles are also involved in scale formation; however. the role of tubular connections between cisternae of a single stack-TGN unit is not clear. The relationship of two morphological types of cisternal dilations to a membrane-associated bottlebrush-shaped macromolecule of novel morphology suggests a new hypothesis for the biogenesis of scales.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 30/11/20 alle ore 16:33:48