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Vacuoles are present in most eukaryotic cells and serve to carry out a variety of essential cellular functions. This special focus issue, introduced by Martinoia et al. (see pp. 1285-1287), features a selection of reviews and original research papers illustrating the many fascinating and versatile aspects of vacuole composition and function in plants, and reveals the importance of vacuoles not just at the cellular level, but also in relation to whole-plant growth and metabolism.
The cover images show autophagic bodies inside the vacuolar lumen in an Arabidopsis root cell captured by transmission electron microscopy (top left; courtesy of Kohki Yoshimoto (Meiji University) and Yoshinori Ohsumi (Tokyo Institute of Technology), myrosinase-containing vacuoles of two types of idioblast; myrosin cells along leaf veins of Cardamine schinziana (Coomassie-blue staining) and guard cells of leaf epidermis of Arabidopsis (electron micrograph) (top right and bottom right, respectively; supplied by Makoto Shirakawa, Nara Institute of Science Technology), and an epidermal strip of a Pelargonium x hortorum petal with anthocyanin-containing shrunken vacuoles in each cell (bottom left; supplied by Rita de Brito Francisco and Lorenzo Borghi, University of Zurich).
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