title: Vesicles Are Persistent Features of Different Plastids.
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.
authors.affiliation: Department of Biological and Environmental Sciences, University of Gothenburg, Box 461, SE-405 30, Gothenburg, Sweden.
authors.forename: Emelie
authors.initials: E
authors.lastname: Lindquist
authors.affiliation: Department of Plant Anatomy, Institute of Biology, Eötvös Loránd University, Pázmány P. s. 1/c, H-1117, Budapest, Hungary.
authors.forename: Katalin
authors.initials: K
authors.lastname: Solymosi
authors.affiliation: Department of Biological and Environmental Sciences, University of Gothenburg, Box 461, SE-405 30, Gothenburg, Sweden. henrik.aronsson@bioenv.gu.se.
authors.forename: Henrik
authors.initials: H
authors.lastname: Aronsson
mesh_terms: D003080:Cold Temperature; D005638:Fruit / Q000235:genetics / Q000378:metabolism / Q000648:ultrastructure; D006358:Hot Temperature; D007425:Intracellular Membranes / Q000378:metabolism / Q000648:ultrastructure*; D009154:Mutation; D018384:Oxidative Stress / Q000235:genetics / Q000502:physiology; D010788:Photosynthesis / Q000502:physiology; D035261:Plant Components, Aerial / Q000235:genetics / Q000378:metabolism / Q000648:ultrastructure; D018517:Plant Roots / Q000235:genetics / Q000378:metabolism / Q000648:ultrastructure; D018514:Plant Structures / Q000235:genetics / Q000378:metabolism / Q000648:ultrastructure*; D018087:Plastids / Q000235:genetics / Q000378:metabolism / Q000648:ultrastructure*; D021381:Protein Transport; D022161:Transport Vesicles / Q000235:genetics / Q000378:metabolism / Q000648:ultrastructure*; D033921:Vesicular Transport Proteins / Q000235:genetics / Q000378:metabolism
chemical_list: D033921:Vesicular Transport Proteins
keywords: chloroplast; peripheral reticulum; plastid; thylakoid development; vesicle