Electrotonic potentials in Aloe vera L.: Effects of intercellular and external electrodes arrangement

Electrostimulation of plants can induce plant movements, activation of ion channels, ion transport, gene expression, enzymatic systems activation, electrical signaling, plant-cell damage, enhanced wound healing, and influence plant growth. Here we found that electrical networks in plant tissues have...

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Published in:	Bioelectrochemistry (Amsterdam, Netherlands) Vol. 113; pp. 60 - 68
Main Authors:	Volkov, Alexander G., Nyasani, Eunice K., Tuckett, Clayton, Scott, Jessenia M., Jackson, Mariah M.Z., Greeman, Esther A., Greenidge, Ariane S., Cohen, Devin O., Volkova, Maia I., Shtessel, Yuri B.
Format:	Journal Article
Language:	English
Published:	Netherlands Elsevier B.V 01-02-2017 Elsevier BV
Subjects:	Aloe Aloe - cytology Aloe - physiology Aloe vera Capacitance Cell activation Cell signaling Electrical differentiators Electrical networks Electrodes Electrophysiological Phenomena Electrostimulation Electrotonic potential Extracellular Space - metabolism Gene expression Intercellular potentials Ion channels Ion pumps Ion transport Ions Leaves Plant growth Plant Leaves - cytology Plant Leaves - physiology Plant tissues Platinum Propagation Silver Soil - chemistry Surface electrodes Surface Properties Wound healing PXI Intercellular potentials C Electrostimulation Electrotonic potential Surface electrodes Ref R DAQ V TEACl Electrical differentiators Vin λ Aloe vera
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Summary:	Electrostimulation of plants can induce plant movements, activation of ion channels, ion transport, gene expression, enzymatic systems activation, electrical signaling, plant-cell damage, enhanced wound healing, and influence plant growth. Here we found that electrical networks in plant tissues have electrical differentiators. The amplitude of electrical responses decreases along a leaf and increases by decreasing the distance between polarizing Pt-electrodes. Intercellular Ag/AgCl electrodes inserted in a leaf and extracellular Ag/AgCl electrodes attached to the leaf surface were used to detect the electrotonic potential propagation along a leaf of Aloe vera. There is a difference in duration and amplitude of electrical potentials measured by electrodes inserted in a leaf and those attached to a leaf's surface. If the external reference electrode is located in the soil near the root, it changes the amplitude and duration of electrotonic potentials due to existence of additional resistance, capacitance, ion channels and ion pumps in the root. The information gained from this study can be used to elucidate extracellular and intercellular communication in the form of electrical signals within plants. [Display omitted] •Electrostimulation of Aloe vera induces electrotonic potentials.•Electrical differentiators and cell-to-cell electrical coupling exist in Aloe vera.•There are many different electrochemical circuits in Aloe vera leaves and roots.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	1567-5394 1878-562X
DOI:	10.1016/j.bioelechem.2016.10.004