Abstract
The primary Al lesion is suggested to be blockage of the root plasma membrane Ca2+ channels. Resulting decrease in net Ca2+ uptake into the root tip cells leads to Ca2+ deficiency in the cytoplasm and disturbance of the cell Ca2+ homeostasis, effects that can deleteriously influence cell structure and function. Contribution of internal Ca2+ stores to maintaining cytoplasmic Ca2+ concentration at physiological levels is considered to be insufficient in meristematic cells at the root tip. It is suggested that differential blockage of Ca2+ channels may be at the core of differential tolerance to Al, opening up the possibility of manipulating Al tolerance at the molecular level.
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Rengel, Z., Pineros, M., Tester, M. (1995). Transmembrane calcium fluxes during Al stress. In: Date, R.A., Grundon, N.J., Rayment, G.E., Probert, M.E. (eds) Plant-Soil Interactions at Low pH: Principles and Management. Developments in Plant and Soil Sciences, vol 64. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-0221-6_39
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DOI: https://doi.org/10.1007/978-94-011-0221-6_39
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