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    Action potentials in abscisic acid-deficient tomato mutant generated spontaneously and evoked by electrical stimulation


    Macedo, F.C.O. and Dziubinska, H. and Trebacz, K. and Oliveira, R.F. and de Andrade Moral, Rafael (2015) Action potentials in abscisic acid-deficient tomato mutant generated spontaneously and evoked by electrical stimulation. Acta Physiologiae Plantarum, 37 (207). ISSN 0137-5881

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    Abstract

    Action potentials generated spontaneously (SAPs) and evoked by electrical stimulation (APs) in tomato plants (Solanum lycopersicum L.) cv. Micro-Tom ABA-deficient mutants (sitiens—MTsit) and its wild type (MTwt) were characterized by continuous monitoring of electrical activity for 66 h and by application of an electrical stimulation supplied extracellularly. MTsit generated SAPs which spread along the stem, including petioles and roots with an amplitude of 44.6 ± 4.4 mV, half-time (t½) of 33.1 ± 2.9 s and velocity of 5.4 ± 1.0 cm min−1. Amplitude and velocity were 43 and 108 % higher in MTsit than in MTwt, respectively. The largest number of SAPs was registered in the early morning in both genotypes. MTsit was less responsive to electrical stimuli. The excitation threshold and the refractory period were greater in MTsit than in MTwt. After current application, APs were generated in the MTwt with 21.2 ± 2.4 mV amplitude and propagated with 5.6 ± 0.5 cm min−1 velocity. Lower intensity stimuli did not trigger APs in these plants. In MTsit APs were measured with amplitude of 26.8 ± 4.8 mV and propagated with velocity of 8.5 ± 0.1 cm min−1.

    Item Type: Article
    Additional Information: © The Author(s) 2015. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. Cite this article as: Macedo, F.C.O., Dziubinska, H., Trebacz, K. et al. Acta Physiol Plant (2015) 37: 207. https://doi.org/10.1007/s11738-015-1950-4
    Keywords: ABA; Action potential; Electrical signal; Sitiens; Stress;
    Academic Unit: Faculty of Science and Engineering > Mathematics and Statistics
    Item ID: 10007
    Identification Number: https://doi.org/10.1007/s11738-015-1950-4
    Depositing User: Rafael de Andrade Moral
    Date Deposited: 25 Sep 2018 17:20
    Journal or Publication Title: Acta Physiologiae Plantarum
    Publisher: Springer
    Refereed: Yes
    URI:

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