Journal
PLANT SIGNALING & BEHAVIOR
Volume 8, Issue 12, Pages -Publisher
TAYLOR & FRANCIS INC
DOI: 10.4161/psb.27433
Keywords
AAA-ATPase; ice plant; SKD1; salt stress; protein trafficking
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Funding
- National Science Council, Taiwan [98-2311-B-005-003-MY3]
- Ministry of Education, Taiwan
- ATU
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Halophyte Mesembryanthemum crystallinum L. (ice plant) rapidly responds to sudden increases in salinity in its environment by activating specific salt-tolerant mechanisms. One major strategy is to regulate a series of ion transporters and proton pumps to maintain cellular Na+/K+ homeostasis. Plant SKD1 (suppressor of K+ transport growth defect 1) proteins accumulate in cells actively engaged in the secretory processes, and play a critical role in intracellular protein trafficking. Ice plant SKD1 redistributes from the cytosol to the plasma membrane hours after salt stressed. In combination with present knowledge of this protein, we suggest that stress facilitates SKD1 movement to the plasma membrane where ADP/ATP exchange occurs, and functions in the regulation of membrane components such as ion transporters to avoid ion toxicity.
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