Effect of extremely low-frequency magnetic fields on light-induced electric reactions in wheat

Grinberg, Marina; Mudrilov, Maxim; Kozlova, E. E.; Sukhov, Vladimir; Sarafanov, Fedor G.; Evtushenko, A. A.; Ilin, N. V.; Vodeneev, Vladimir; Price, Colin; Mareev, E. A.

doi:10.1080/15592324.2021.2021664

Cited by 11 publications

(10 citation statements)

References 48 publications

(81 reference statements)

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“…In general, the obtained results indicate that the effect of the low-frequency MF on wheat plants is much more pronounced in the presence of an additional factor than without the stressor. The observed effect is consistent with the earlier reported effects of MFs with similar characteristics on the activity of photosynthesis and the magnitude of the electric potential, which were also more pronounced in “transitional” (during the transition from darkness to light), rather than stationary, conditions [ 13 , 14 , 15 ].…”

Section: Discussionsupporting

confidence: 91%

“…In the case of alternating MFs of relatively low intensity, the effects are often weakly expressed or absent under stationary conditions [ 11 , 12 ], but they manifest themselves during transient processes when the environmental conditions change. In particular, in our previous works, such a pattern was established in relation to the activity of photosynthesis and the electric potential in wheat plants under the action of an alternating MF with a frequency of 14.3 Hz and an intensity of 3–180 μT, and the greatest effect was revealed under the influence of an ELF MF of 18 µT [ 13 , 14 , 15 ].…”

Section: Introductionmentioning

confidence: 94%

“…The above assumption is based on the effects of ELF MFs on the activities of key signaling systems, including calcium, ROS, and the hormonal system, which have been identified to date [ 2 , 15 , 21 , 29 , 30 , 31 ]. In particular, the influence of an alternating MF with a frequency of 14.3 Hz on wheat plants has an effect on the activity of antioxidant enzymes—key participants in ROS signaling [ 32 ].…”

Section: Introductionmentioning

confidence: 99%

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The Effect of an Extremely Low-Frequency Electromagnetic Field on the Drought Sensitivity of Wheat Plants

Mshenskaya

Grinberg

Kalyasova

et al. 2023

Plants

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Extremely low-frequency magnetic fields are thought to be capable of modulating the resistance of plants to adverse factors, particularly drought. Magnetic fields in this frequency range occur in nature in connection with so-called Schumann resonances, excited by lightning discharges in the Earth–ionosphere cavity. The aim of this work was to identify the influence of a magnetic field with a frequency of 14.3 Hz (which corresponds to the second Schumann harmonic) on the transpiration and photosynthesis of wheat plants under the influence of drought. The activity of photosynthesis processes, the crop water stress index, relative water content and leaf area were determined during drought intensification. At the end of the experiment, on the 12th day of drought, the length, and fresh and dry weight of wheat shoots were measured. The results obtained indicate a protective effect of the magnetic field on plants in unfavorable drought conditions; the magnetic field delayed the development of harmful changes in the transpiration and photosynthesis processes for several days. At the same time, in the absence of the stressor (drought), the effect of the electromagnetic field was not detected, except for a decrease in relative transpiration. In favorable conditions, there were only minimal modifications of the photosynthetic processes and transpiration by the magnetic field.

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Section: Discussionsupporting

confidence: 91%

Section: Introductionmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

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The Effect of an Extremely Low-Frequency Electromagnetic Field on the Drought Sensitivity of Wheat Plants

Mshenskaya

Grinberg

Kalyasova

et al. 2023

Plants

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“…On the other hand, HESs (system potentials) are based on the transient activation of H + -ATPase in the plasma membrane ( Zimmermann et al., 2009 ) which may be caused by the propagation of the hydraulic wave with moderate magnitude, the followed activation of mechanosensitive Ca 2+ channels, and intermediate increase of calcium concentration in the cytoplasm ( Yudina et al., 2023 ). Possibility of positive influence of the increased Ca 2+ concentration on the H + -ATPase activity is supported by previous electrophysiological investigations ( Lew, 1989 ; Grinberg et al., 2022 ).…”

Section: Discussionsupporting

confidence: 73%

Hyperpolarization electrical signals induced by local action of moderate heating influence photosynthetic light reactions in wheat plants

et al. 2023

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Local action of stressors induces fast changes in physiological processes in intact parts of plants including photosynthetic inactivation. This response is mediated by generation and propagation of depolarization electrical signals (action potentials and variation potentials) and participates in increasing plant tolerance to action of adverse factors. Earlier, we showed that a local action of physiological stimuli (moderate heating and blue light), which can be observed under environmental conditions, induces hyperpolarization electrical signals (system potentials) in wheat plants. It potentially means that these signals can play a key role in induction of fast physiological changes under the local action of environmental stressors. The current work was devoted to investigation of influence of hyperpolarization electrical signals induced by the local action of the moderate heating and blue light on parameters of photosynthetic light reactions. A quantum yield of photosystem II (ФPSII) and a non-photochemical quenching of chlorophyll fluorescence (NPQ) in wheat plants were investigated. It was shown that combination of the moderate heating (40°C) and blue light (540 µmol m-2s-1) decreased ФPSII and increased NPQ; these changes were observed in 3-5 cm from border of the irritated zone and dependent on intensity of actinic light. The moderate soil drought (7 days) increased magnitude of photosynthetic changes and shifted their localization which were observed on 5-7 cm from the irritated zone; in contrast, the strong soil drought (14 days) suppressed these changes. The local moderate heating decreased ФPSII and increased NPQ without action of the blue light; in contrast, the local blue light action without heating weakly influenced these parameters. It meant that just local heating was mechanism of induction of the photosynthetic changes. Finally, propagation of hyperpolarization electrical signals (system potentials) was necessary for decreasing ФPSII and increasing NPQ. Thus, our results show that hyperpolarization electrical signals induced by the local action of the moderate heating inactivates photosynthetic light reactions; this response is similar with photosynthetic changes induced by depolarization electrical signals. The soil drought and actinic light intensity can influence parameters of these photosynthetic changes.

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“…(iii) The increased Ca 2+ concentration suppresses the activity of H + -ATPase [109]; however, there are works [110,111] showing that Ca 2+ can induce the transition from inactive to active state of H + -ATPase (at least, under salt stress). (iv) The hypothesis about the two-phase dependence of activity of H + -ATPase on Ca 2+ concentration (activation under moderate concentrations and inactivation under high concentrations) effectively explains the influence of a low-frequency magnetic field on the plant electrical activity [112].…”

Section: Discussionmentioning

confidence: 99%

Influence of Burning-Induced Electrical Signals on Photosynthesis in Pea Can Be Modified by Soil Water Shortage

Yudina

Gromova

Grinberg

et al. 2022

Plants

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Local damage to plants can induce fast systemic physiological changes through generation and propagation of electrical signals. It is known that electrical signals influence numerous physiological processes including photosynthesis; an increased plant tolerance to actions of stressors is a result of these changes. It is probable that parameters of electrical signals and fast physiological changes induced by these signals can be modified by the long-term actions of stressors; however, this question has been little investigated. Our work was devoted to the investigation of the parameters of burning-induced electrical signals and their influence on photosynthesis under soil water shortage in pea seedlings. We showed that soil water shortage decreased the amplitudes of the burning-induced depolarization signals (variation potential) and the magnitudes of photosynthetic inactivation (decreasing photosynthetic CO2 assimilation and linear electron flow and increasing non-photochemical quenching of the chlorophyll fluorescence and cyclic electron flow around photosystem I) caused by these signals. Moreover, burning-induced hyperpolarization signals (maybe, system potentials) and increased photosynthetic CO2 assimilation could be observed under strong water shortage. It was shown that the electrical signal-induced increase of the leaf stomatal conductance was a potential mechanism for the burning-induced activation of photosynthetic CO2 assimilation under strong water shortage; this mechanism was not crucial for photosynthetic response under control conditions or weak water shortage. Thus, our results show that soil water shortage can strongly modify damage-induced electrical signals and fast physiological responses induced by these signals.

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Effect of extremely low-frequency magnetic fields on light-induced electric reactions in wheat

Cited by 11 publications

References 48 publications

The Effect of an Extremely Low-Frequency Electromagnetic Field on the Drought Sensitivity of Wheat Plants

The Effect of an Extremely Low-Frequency Electromagnetic Field on the Drought Sensitivity of Wheat Plants

Hyperpolarization electrical signals induced by local action of moderate heating influence photosynthetic light reactions in wheat plants

Influence of Burning-Induced Electrical Signals on Photosynthesis in Pea Can Be Modified by Soil Water Shortage

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