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Endocytic Pathways and Recycling in Growing Pollen Tubes

Pollen tube growth is based on transport of secretory vesicles into the apical region where they fuse with a small area of the plasma membrane. The amount of secretion greatly exceeds the quantity of membrane required for growth. Mechanisms of membrane retrieval have recently been demonstrated and p...

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Autores principales: Onelli, Elisabetta, Moscatelli, Alessandra
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2013
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4844360/
https://www.ncbi.nlm.nih.gov/pubmed/27137373
http://dx.doi.org/10.3390/plants2020211
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author Onelli, Elisabetta
Moscatelli, Alessandra
author_facet Onelli, Elisabetta
Moscatelli, Alessandra
author_sort Onelli, Elisabetta
collection PubMed
description Pollen tube growth is based on transport of secretory vesicles into the apical region where they fuse with a small area of the plasma membrane. The amount of secretion greatly exceeds the quantity of membrane required for growth. Mechanisms of membrane retrieval have recently been demonstrated and partially characterized using FM (Fei Mao) dyes or charged nanogold. Both these probes reveal that clathrin-dependent and -independent endocytosis occur in pollen tubes and are involved in distinct degradation pathways and membrane recycling. Exocytosis, internalization and sorting of PM proteins/lipids depend on the integrity of the actin cytoskeleton and are involved in actin filament organization. However, some kinds of endocytic and exocytic processes occurring in the central area of the tip still need to be characterized. Analysis of secretion dynamics and data derived from endocytosis highlight the complexity of events occurring in the tip region and suggest a new model of pollen tube growth.
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spelling pubmed-48443602016-04-29 Endocytic Pathways and Recycling in Growing Pollen Tubes Onelli, Elisabetta Moscatelli, Alessandra Plants (Basel) Review Pollen tube growth is based on transport of secretory vesicles into the apical region where they fuse with a small area of the plasma membrane. The amount of secretion greatly exceeds the quantity of membrane required for growth. Mechanisms of membrane retrieval have recently been demonstrated and partially characterized using FM (Fei Mao) dyes or charged nanogold. Both these probes reveal that clathrin-dependent and -independent endocytosis occur in pollen tubes and are involved in distinct degradation pathways and membrane recycling. Exocytosis, internalization and sorting of PM proteins/lipids depend on the integrity of the actin cytoskeleton and are involved in actin filament organization. However, some kinds of endocytic and exocytic processes occurring in the central area of the tip still need to be characterized. Analysis of secretion dynamics and data derived from endocytosis highlight the complexity of events occurring in the tip region and suggest a new model of pollen tube growth. MDPI 2013-04-03 /pmc/articles/PMC4844360/ /pubmed/27137373 http://dx.doi.org/10.3390/plants2020211 Text en © 2013 by the authors; licensee MDPI, Basel, Switzerland. http://creativecommons.org/licenses/by/3.0/ This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/).
spellingShingle Review
Onelli, Elisabetta
Moscatelli, Alessandra
Endocytic Pathways and Recycling in Growing Pollen Tubes
title Endocytic Pathways and Recycling in Growing Pollen Tubes
title_full Endocytic Pathways and Recycling in Growing Pollen Tubes
title_fullStr Endocytic Pathways and Recycling in Growing Pollen Tubes
title_full_unstemmed Endocytic Pathways and Recycling in Growing Pollen Tubes
title_short Endocytic Pathways and Recycling in Growing Pollen Tubes
title_sort endocytic pathways and recycling in growing pollen tubes
topic Review
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4844360/
https://www.ncbi.nlm.nih.gov/pubmed/27137373
http://dx.doi.org/10.3390/plants2020211
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