Temperature Sensing by Plants: Calcium-Permeable Channels as Primary Sensors—A Model

Temperature Sensing by Plants: Calcium-Permeable Channels as Primary Sensors—A Model Recently the properties of temperature sensing in plants have been demonstrated experimentally by Plieth et al. (The Plant Journal 1999. 18:491–497). The relevant biophysical parameters are established here by mathematical modeling in order to understand the experimental findings in quantitative terms. A simple one-compartment model is presented, as a preliminary approach to explain how the input signal (i.e., temperature T) is perceived and how the information is translated into an output signal in the plant cell (i.e., [Ca2+] c ). The model is based on the fact that calcium influx into the cytoplasm is mediated by calcium-permeable channels which are assumed to be solely dependent on cooling rate (dT/dt) and calcium efflux is mediated by calcium pumps which have been shown to be dependent on absolute temperature (T). Firstly, it is demonstrated that this model is able to meet the demand for a satisfactory interpretation of the experimental data, and secondly that it reproduces the experimentally observed features of the cooling induced [Ca2+] c changes well. This suggests that the primary temperature sensor in plants might be a Ca2+-permeable channel. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png The Journal of Membrane Biology Springer Journals

Temperature Sensing by Plants: Calcium-Permeable Channels as Primary Sensors—A Model

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Copyright © Inc. by 1999 Springer-Verlag New York
Life Sciences; Biochemistry, general; Human Physiology
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