Ways of signal transmission and physiological role of electrical potentials in plants

Dziubińska, Halina

doi:10.5586/asbp.2003.040

Cited by 31 publications

(24 citation statements)

References 67 publications

(85 reference statements)

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“…1c). It is probable that SAPs are propagated along the vascular bundle similar to stimuli-induced APs (Dziubińska et al 2001;Dziubinska 2003;Fromm and Lautner 2007; Salvador-Recatala et al ). Electrode arrangement shown in Fig.…”

Section: Spontaneous Action Potentialsmentioning

confidence: 99%

“…light, shadow, wounding, touch, temperature, or chemicals (glutamate, potassium chloride) (Dziubinska 2003;Fromm and Lautnersensitive plants Mimosa pudica and Dionaea muscipula is the best-visible and evident effector response in plants (Sibaoka 1991;Krol et al 2012). Besides the stimuli-induced APs, there are SAPs described 20 years ago by Zawadzki et al (1995).…”

Section: Introductionmentioning

confidence: 99%

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Spontaneous action potentials and circumnutation in Helianthus annuus

Stolarz

Dziubińska

2017

Acta Physiol Plant

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Action potentials (APs) in plants are involved in fast leaf or trap closure as well as elongation, respiration, photosynthesis, and fertilization regulation. Here, spontaneous APs (SAPs) in relation to endogenous stem movement named circumnutation (CN) have been investigated in Helianthus annuus in different light conditions in freely circumnutating and immobilized plants. Extracellular electrical measurements and time-lapse photography were carried out simultaneously. The parameters of CN (trajectory length, period, and direction) and the number and transmission direction of SAPs were analysed. In continuous light (25-40 lmol m -2 s -1), all plants circumnutating vigorously in a regular elliptical manner and no SAPs were observed. In light/dark conditions, the plants circumnutated in a daily pattern, most SAPs were observed in the dark and freely circumnutated sunflowers had two times more SAPs (10 SAPs/24 h/plant) than the immobilized plants (5 SAPs/24 h/plant). In continuous very low light (5 lmol m -2 s -1 ), the plants circumnutated weakly and irregularly and SAPs appeared without the circadian pattern. 3-5 SAPs/24/plant occurred in the freely circumnutating and immobilized plants. In light/dark and continuous very low light conditions, an ultradian rhythm of SAPs was observed and the mean spacing between SAPs was approx. 121-271 min in the freely circumnutating and immobilized plants. Under all light conditions, more SAPs were transmitted basipetally than acropetally. One-hour lasting series of 3-4 min spaced SAPs locally propagated were observed as well in very low light. Basipetal and acropetal SAPs passing along the stem motor region accompany irregularity, changes in the CN trajectory direction, and stem torsion. These results demonstrate that APs and CN changes play a role in plant adaptation to light conditions and that there is an ultradian rhythm of SAPs beside ultradian CN rhythm.

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Section: Spontaneous Action Potentialsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Spontaneous action potentials and circumnutation in Helianthus annuus

Stolarz

Dziubińska

2017

Acta Physiol Plant

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“…For plants, the corresponding situation, especially the final step of registering consciousness, is nearly unknown, but some clues regarding the preceding steps can come from studies of action potentials (APs) as indicators of electrical activity. 211 Quantum effects at ion channels have been proposed to induce APs, 19 and the electromagnetic field generated by the multiple APs of cerebral neurons has been advanced as a component of conscious awareness. 212 Action potentials and their relevance to possible plant consciousness will now be explored further.…”

Section: Alternative Modes Of Consciousnessmentioning

confidence: 99%

The natural history of consciousness, and the question of whether plants are conscious, in relation to the Hameroff-Penrose quantum-physical ‘Orch OR’ theory of universal consciousness

Barlow

2015

Communicative & Integrative Biology

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Abbreviations used AP action potential, EEG electroencephalograph, EPD electrical potential difference, MAP microtubule-associated protein, MT microtubule, Orch OR orchestrated objective reduction Downloaded by [University of Otago] at 00:21 14 July 2015 2 2 Whether or not plants exhibit consciousness in the sense that they possess a 'sensation of self' is uncertain. Unlike humans and certain animals, plants cannot be interrogated directly on this matter. In any case, it is possible that states of consciousness, like brains and nervous systems of animals, have evolved and developed in different ways, depending on their phylogeny. However, some of the criteria by which consciousness is inferred to be present in animals are met by plants. For example, plants display features of cognition (sensing and response) and of learning and memory which, in animals, contribute to the conscious state. Plants also possess a rudiment ary nervous system similar to that found in basal animals and have, perhaps, a simple brain, as well as showing slow and fast transmissable electrical activity, all of which are strong correlates of consciousness in animals. However, the question of consciousness in general can be approached in different way. This is by taking the Orch OR (Orchestrated Objective Reduction) hypothesis of Hameroff and Penr ose 1 as a starting point. The Orch OR hypothesis, which is based in quantum physics, proposes that, when a sufficient mass of tubulin molecules has assembled into cytoskeletal microtubules (MTs) within neuronal cells of the brain, these structures become sites of quantum c omputation and of quantum state reduction (OR) events resulting in moments of protoconsciousness. Because plant cells also have large populations of MTs, and because plant MTs share properties with those of animal neuronal MTs, which putatively orchestrate OR events, plant MTs might also be sites of quantum reduction events and, hence, lead to momentary protoconsciousness. The extent to which the Orch OR hypothesis is applicable to plants is examined, and it is argued that, within the plant body, the most likely tissue where OR events could be located and promote protoconsciousness is to be found in the system of ray cells of tree trunks in which bundled MTs and actin filaments are prevalent.A single complete ray complex is estimated to contain about as many tubulin molecules as a single human cerebral neuron.Inferential evidence used by Hameroff and Penrose to support their Orch OR hypothesis leads in another direction. These authors presented estimates of the frequency of protoconscious or conscious moments. This frequency turns out to be similar to the fr equency of successive Earthly quantal time units, according to a theory proposed by G. Dorda. 2 These time units are also intimately linked with simultaneous changes of quantal mass, both mass and time being structured according to the motions of Earth and Moon around the Sun.In the case of cellular tissues, quantised mass takes the form of aggregates of water, and these are ...

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“…Although both signals reflect the changes in plasma membrane potential, they differ in their origin and characteristics. APs in plants are selfpropagating electrical signals mediated through voltagegated channels and transmitted preferentially in phloem (Fromm and Bauer 1994, Rhodes et al 1996, Dziubinska 2003, Davies 2006. APs appear after non-damaging stimuli (e.g.…”

Section: ⎯⎯⎯⎯mentioning

confidence: 99%

A low-noise multi-channel device for the monitoring of systemic electrical signal propagation in plants

Ilı́k¹,

Hlaváčková²,

Krchňák³

et al. 2010

Biologia plant.

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Long-distance electrical signals generated in locally stimulated plants are linked with systemic physiological responses. The propagation of electrical signal through a plant can be measured by multiple electrodes attached to different sites of a plant body. As this signal has to be measured with the sensitivity of tens of microvolts, it can be easily disturbed by power-line hums or external electromagnetic fields. These disturbances can mimic the action potentials generated by a plant. In this work, we present a brief summary of various experimental approaches to the measurement of surface electrical potential (SEP) on a plant and a description of our multi-channel device for the SEP measurement. The main advantages of our measuring system are galvanic separation of the measuring unit, resulting in the elimination of power-line disturbances, and simple and stable contact of Ag/AgCl-peletted electrodes with the plant surface, facilitated by an ordinary gel used in human electrocardiography. These improvements enabled us to detect unperturbed variation (slow) and action (fast) potentials on a plant, as demonstrated by the four-electrode measurement of the electrical signal propagation in a locally wounded tomato plant.

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Ways of signal transmission and physiological role of electrical potentials in plants

Cited by 31 publications

References 67 publications

Spontaneous action potentials and circumnutation in Helianthus annuus

Spontaneous action potentials and circumnutation in Helianthus annuus

The natural history of consciousness, and the question of whether plants are conscious, in relation to the Hameroff-Penrose quantum-physical ‘Orch OR’ theory of universal consciousness

A low-noise multi-channel device for the monitoring of systemic electrical signal propagation in plants

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