Spatiotemporal dynamics of the electrical network activity in the root apex

Masi, Elisa; Ciszak, Marzena; Stefano, Giovanni; Renna, Luciana; Azzarello, Elisa; Pandolfi, Camilla; Mugnai, S.; Baluška, Frantǐsek; Arecchi, F. T.; Mancuso, Stefano

doi:10.1073/pnas.0804640106

Cited by 127 publications

(109 citation statements)

References 76 publications

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“…Furthermore, several electrical signals from single cells can be synchronized in time and space 4,15 , similarly to a neuronal electrical network. Our finding that the distribution of ΔVs follows a power law can bring some light to the phenomenon of synchronization.…”

Section: Discussionmentioning

confidence: 99%

Beyond APs and VPs: evidences of chaos and self-organized criticality in electrical signals in plants

Gfr

2016

Preprint

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Studies on plant electrophysiology are mostly focused on specific traits of action potentials (APs) and/or variation potentials (VPs), often in single cells. Inspired by the complexity of the signaling network in plants and by analogies with some traits of neurons in human brains, we have sought for evidences of high complexity in the electrical dynamics of plant signaling, beyond APs and VPs responses. Thus, from EEG-like data analyses of soybean plants, we showed consistent evidences of chaotic dynamics in the electrical time series. Furthermore, we have found that the dynamic complexity of electrical signals is affected by the plant physiological conditions, decreasing when plant was stressed. Surprisingly, but not unlikely, we have observed that, after stimuli, electrical spikes arise following a power law distribution, which is indicative of self-organized criticality (SOC). Since, as far as we know, these were the first evidences of chaos and SOC in plant electrophysiology, we have asked follow-up questions and we have proposed new hypotheses, seeking for improving our understanding about these findings.

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Section: Discussionmentioning

confidence: 99%

Beyond APs and VPs: evidences of chaos and self-organized criticality in electrical signals in plants

Gfr

2016

Preprint

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“…GLRs also have been implicated in root development in Arabidopsis since Glu can affect root architecture (Walch-Liu et al, 2006). Additionally, GLRs might have a role in Ca 2+ -dependent generation of electrical potentials in the root (Masi et al, 2009). Moreover, plants that have been treated with antagonists of GLRs display impaired light-induced signal transduction, harbor enlarged hypocotyls, and accumulate less chlorophyll when grown in light, suggesting that GLRs may also function in photomorphogenesis (Lam et al, 1998;Brenner et al, 2000).…”

Section: Ligand-gated Channels At the Plasma Membranementioning

confidence: 99%

Calcium Signals: The Lead Currency of Plant Information Processing

2010

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Ca 2+ signals are core transducers and regulators in many adaptation and developmental processes of plants. Ca 2+ signals are represented by stimulus-specific signatures that result from the concerted action of channels, pumps, and carriers that shape temporally and spatially defined Ca 2+ elevations. Cellular Ca 2+ signals are decoded and transmitted by a toolkit of Ca 2+ binding proteins that relay this information into downstream responses. Major transduction routes of Ca 2+ signaling involve Ca 2+ -regulated kinases mediating phosphorylation events that orchestrate downstream responses or comprise regulation of gene expression via Ca 2+ -regulated transcription factors and Ca 2+ -responsive promoter elements. Here, we review some of the remarkable progress that has been made in recent years, especially in identifying critical components functioning in Ca 2+ signal transduction, both at the single-cell and multicellular level. Despite impressive progress in our understanding of the processing of Ca 2+ signals during the past years, the elucidation of the exact mechanistic principles that underlie the specific recognition and conversion of the cellular Ca 2+ currency into defined changes in protein-protein interaction, protein phosphorylation, and gene expression and thereby establish the specificity in stimulus response coupling remain to be explored.

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“…Electrical, chemical (hormones), hydraulic and mechanical signals constitute the information system of plants in plant neurobiology [4][5]. In information transmission, because the electrical signal can quickly transmit information over long distances within plant [4][5][6][7], to transmit information more quickly and effectively compared to chemical signals [4,6,8], and it has proved that electrical signals can affect such central physiological processes as the respiratory metabolism, photosynthesis, stomata conductance, water uptake in physiological processes [4,[9][10][11], therefore, the plant electrical signals become a hot research in recent years. Now it is generally believed that potential fluctuation in the plant is a basic physiological property of plant, plant transmits information flow through this nature to make a specific response to environmental stress [6,8,[12][13][14].…”

Section: Introductionsmentioning

confidence: 99%