Fuente: WIPO "tomato" A working electrode is inserted into the plant to monitor the health of the plant components or to detect physical, mechanical damage or environmental change in the soil or atmosphere. A standard electrode is inserted into soil surrounding the plant or in the plant itself. A data logger connects the working electrode and the standard electrode. The data logger measures the potential difference between the working electrode and the electrolyte to provide the ability to compare a measured potential difference with a predetermined critical potential difference for the plant. A second electrochemical cell can inject electrons and ions into the plant. The plant can be used as a sensor to monitor the environmental change in the soil or in the atmosphere.