ABSTRACT
Global energy crisis is caused by increasing world population, escalating demand due to urbanisation, and continued dependence on fossil-based fuels. Attempts have been made to harvest electricity from free electrons available in plant leaves produced during photosynthesis and from rhizosphere of plants formed as a result of bacterial activity. The process of communication inside the plant system is called signal transduction. Signal transduction is a cascade of events starting from the receiver to the effector molecules, which propagates the information for inter-cellular communication. Generation of electrical signals in plants is due to the presence of nutrient elements in ionic form inside the plant system. Electrical signals in plants are detectable as a physical quantity, impulse, voltage or electric currents. Extra-cellular electrical signals are recorded using electrodes attached to the portion in between plant parts. Direction changes in the biomachine can be observed by varying light modes which results in change in frequency of action potential signals from plants.
