• Citer

Ion transport in marine algae: from uniform to self-organized processes.

par Homblé, Fabrice ;Léonetti, M
Référence Algae: Nutrition, Pollution Control and Energy Sources., Kristian N. Hagen, Hauppauge NY, page (201-246)
Publication Publié, 2008

Partie d'ouvrage collectif

• Détails
• Contenu

Résumé :

Cells and organelles are surrounded by at least one membrane that controls the exchange of energy and matter between the cytoplasm and its environment. Ion transport through membranes is an essential process for life. For instance, algae nutrition, osmotic and hydrostatic pressure regulation and cell signaling are typical cellular functions that are directly controlled by the transport of ions through the plasma membrane. The quantitative description of membrane transport through algae (and plants in general) is usually restricted to the uniform steady state case. However, spatial and temporal dynamics arising from the nonlinear properties of ion transport have recently been revealed to be of prime importance for cell signaling and developmental axis emergence. We will review the mechanisms of ion transport (active and passive transport) in marine algae and their implication in cell physiology, morphology and homeostasis. The basic principles of ion transport will be explain and we will show how the nonlinear coupling between different ion transport systems such as ATPases, channels and co-transports can give rise to self-organized spatiotemporal events such as action potentials or stationary patterns of transcellular currents observed in marine algae. © 2009 by Nova Science Publishers, Inc. All rights reserved.