Generation and propagation of electrical signals (ESs) are a typical plant response on local action of numerous stressors, including burning, heating, wounding, cooling, and many others. It is known that ESs can strongly modify expression of defense genes, production of stress phytohormones, photosynthetic processes, respiration, adenosine triphosphate content, phloem mass flow, transpiration, and so on; development of a systemic adaptive response is hypothesized to be a final result of these changes. Thus, ESs can be considered as an important mechanism of the plant integration under stress conditions. However, many ESs-induced physiological changes can transiently decrease interactions between cells, between parts of plants, or between plant and environment. We suppose that this “transient separation” can play an adaptive role through storage of macroergic compounds in separate cells or parts of plants, restriction of propagation of damaging factors, and, maybe, stimulation of the programmed cell death in some cells. The separation also prevents an additional induction of new ESs during ESs-caused physiological changes because this induction can be dangerous for plants. As a result, the “integrative” role of ESs in higher plants can be related to induction of the transient separation.
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