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The EXPORTIN1 Genes (XPO1A and XPO1B) in Arabidopsis: Are They Functionally Redundant? pp. 121-127 $100.00
Authors:  (Lian-Chin Wang, Shaw-Jye Wu, Department of Life Sciences, National Central University, Jhong-li City, Taoyuan, Taiwan)
Abstract:
Plants are immobile and, therefore, confronted with a variety of environmental stresses. To adapt to these harmful conditions, plants have developed effective and complex stress signal transduction pathways between the nucleus and cytoplasm for response to and survival from stress conditions. In eukaryotic cells, the nuclear envelope separates the cytoplasm from the nucleus, and the nuclear pore complex (NPC) is the gateway for signal molecules trafficking across the nuclear envelope (Meier and Brkljacic, 2009). Small molecules utilize passive diffusion to pass through the NPC; however, the efficient and directed translocation of macromolecules requires nuclear transport receptors to facilitate the passage through the NPC. In this regard, importinβ-like nuclear transport receptors are the main receptors for nuclear transport in Arabidopsis. Some of these receptors act as nuclear import receptors (importins) and some as nuclear export receptors (exportins) (Merkle, 2004; Merkle, 2008). In addition, many stress responses in plants are controlled by the nucleocytoplasmic partitioning of regulatory molecules between the cytoplasm and nucleoplasm, such as light, temperature, and responses to cytokinin-signal transduction and pathogen infection (Meier, 2005). Thus, importins and exportins are very important for plant growth, development, and stress response. 


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The EXPORTIN1 Genes (XPO1A and XPO1B) in Arabidopsis: Are They Functionally Redundant? pp. 121-127