Current views of the activities inherent in the vacuole as a multifunctional compartment in higher plant cells are outlined. The available data indicate that the vacuole is involved in ion homeostasis of the cytosol, storing products of the primary and secondary metabolism, osmoregulation, generation of defense responses of plant cells under biotic and abiotic stress, and programmed cell death. Transport of diverse molecules and ions across the vacuolar membrane, i.e., the tonoplast, plays the major role in all these functional activities of the vacuole. Much progress toward the identification of the transport systems located in this membrane and the elucidation of the mechanisms underlying their functioning has been achieved in the last 10–15 years and has given new insights into the role of the vacuole in the integration and regulation of plant cell metabolism.
Russian Journal of Plant Physiology – Springer Journals
Published: Oct 10, 2004
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