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Vesicles Are Persistent Features of Different Plastids

Journal article
Authors Emelie Lindquist
K. Solymosi
Henrik Aronsson
Published in Traffic
Volume 17
Issue 10
Pages 1125-1138
ISSN 1398-9219
Publication year 2016
Published at Department of Biological and Environmental Sciences
Pages 1125-1138
Language en
Links dx.doi.org/10.1111/tra.12427
Keywords chloroplast, peripheral reticulum, plastid, thylakoid development, vesicle
Subject categories Botany, Biochemistry and Molecular Biology

Abstract

Peripheral vesicles in plastids have been observed repeatedly, primarily in proplastids and developing chloroplasts, in which they are suggested to function in thylakoid biogenesis. Previous observations of vesicles in mature chloroplasts have mainly concerned low temperature pretreated plants occasionally treated with inhibitors blocking vesicle fusion. Here, we show that such vesicle-like structures occur not only in chloroplasts and proplastids, but also in etioplasts, etio-chloroplasts, leucoplasts, chromoplasts and even transforming desiccoplasts without any specific pretreatment. Observations are made both in C3 and C4 species, in different cell types (meristematic, epidermis, mesophyll, bundle sheath and secretory cells) and different organs (roots, stems, leaves, floral parts and fruits). Until recently not much focus has been given to the idea that vesicle transport in chloroplasts could be mediated by proteins, but recent data suggest that the vesicle system of chloroplasts has similarities with the cytosolic coat protein complex II system. All current data taken together support the idea of an ongoing, active and protein-mediated vesicle transport not only in chloroplasts but also in other plastids, obviously occurring regardless of chemical modifications, temperature and plastid developmental stage. © 2016 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd

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