Electrical impedance spectroscopy (EIS) in plant roots research: a review

Yang, Liu; Li, Dongming; Qian, Ji; Di, Bao; Zhang, Gang; Ren, Zhenhui

doi:10.1186/s13007-021-00817-3

Cited by 29 publications

(21 citation statements)

References 119 publications

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“…Two series circuits composed of constant phase elements (CPEs) in parallel with resistances were also used for fitting the electrode/cuticle contact (electrode component) and the capacitive coupling between polarized upper epidermis and mesophyll (tissue component). 46,47 The capacitances were represented as CPEs likely because of the abundant occurrence of cells on foliar tissue, resulting in electronic dispersity and, thus in non-ideal electrical capacitors. 42 Having reached the equivalent electrical circuit of the onleaf analyses, we turned our attention to evaluating the performance of electrodes to monitor LWC as the leaves dried out.…”

Section: Discussionmentioning

confidence: 99%

Scalable and green formation of graphitic nanolayers produces highly conductive pyrolyzed paper toward sensitive electrochemical sensors

et al. 2023

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Section: Discussionmentioning

confidence: 99%

Scalable and green formation of graphitic nanolayers produces highly conductive pyrolyzed paper toward sensitive electrochemical sensors

et al. 2023

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“…Current pathways in roots remain certainly the main unknown since there is a gap in techniques to measure it non-destructively (Ehosioke et al, 2020;Liu et al, 2021). The current pathways in roots are possibly linked to RWU.…”

Section: Current Pathways In Roots Under Prd Constraintsmentioning

confidence: 99%

Imaging of the active root current pathway under partial root-zone drying stress: A laboratory study for Vitis vinifera

Mary

Iván

Meggio

et al. 2023

Preprint

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Abstract. Understanding root signals and their consequences on the whole plant physiology is one of the keys to tackling the water-saving challenge in agriculture. The partial root-zone drying (PRD) method is part of an ensemble of irrigation strategies that aim at improving water use efficiency. To reach this goal tools are needed for the evaluation of the root’s and soil water dynamics in time and space. In controlled laboratory conditions, using a rhizotron built for geoelectrical tomography imaging, we monitored the spatio-temporal changes in soil electrical resistivity for more than a month corresponding to six Partial Rootzone Drying (PRD) cycles. Electrical Resistivity Tomography (ERT) was complemented with Electrical Current Imaging (ECI) using plant stem-induced electrical stimulation. We demonstrated that under mild water stress conditions, it is practically impossible to spatially distinguish the PRD effects using ECI. We evidenced that the Current Source leakage depth varied during the course of the experiment but without any significant relationship to the soil water content changes or transpiration demand. On the other hand, ERT showed spatial patterns associated with irrigation and, to a lesser degree, to RWU. The interpretation of the geoelectrical imaging with respect to root activity was strengthened and correlated with indirect observations of the plant transpiration using a weight monitoring lysimeter and direct observation of the plant leaf gas exchanges.

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“…The characterisation and monitoring of materials and substance properties based on dielectric sensing is a well-established approach for many scientific and industrial applications [ 1 ]. Examples can be found in agricultural applications [ 2 , 3 ], monitoring of food [ 4 ], forestry [ 2 , 3 , 4 , 5 , 6 , 7 ], biomass [ 6 ], and biofuels [ 7 ]. For example, moisture content is an essential parameter for the quality of these goods.…”

Section: Introductionmentioning

confidence: 99%

Transmission Lines in Capacitance Measurement Systems: An Investigation of Receiver Structures

Flatscher

Neumayer

Bretterklieber

et al. 2023

Sensors

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Dielectric sensing based on capacitive measurement technology is a favourable measurement approach in many industries and fields of application. From an electrical point of view, a coupling capacitance must be measured in the presence of stray capacitances. Different receiver circuit structures have been proposed for the underlying displacement current measurement. Ideally, the sensor assembly is directly connected to the sensor circuitry to minimize the influence with respect to these parasitic capacitances. However, under harsh operating conditions, e.g., at high temperatures, the sensor and the receiver circuit must be separated in order to protect the electronics. Consequently, the receiver circuit and the sensor have to be connected by cables, e.g., coaxial cables. The measurement setup differs significantly from the ideal design with a direct connection. In this paper, we investigate the behaviour of three common measurement circuits for capacitive measurements in instrumentations with cables. We study the interaction between the sensor and the electronics and analyse the operating behaviour of the circuit, as well as the operating states of the amplifiers used. We also address cross-sensitivities in the sensor design due to stray capacitances. The analyses are carried out for different cable lengths and measuring frequencies, and conditions for the usability of the circuit are deduced. In addition to the operational behaviour, we also evaluate the circuits by means of a noise analyses. Based on this analysis, we show a direct comparison of the circuits. The analysis is based on simulation studies, as well as collaborative measurements on test circuits where all circuit parameters are provided. The test circuits are realized with dedicated state-of-the-art circuit elements and, together with the analysis approach and the results, thus provide a basis for future developments.

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Electrical impedance spectroscopy (EIS) in plant roots research: a review

Cited by 29 publications

References 119 publications

Scalable and green formation of graphitic nanolayers produces highly conductive pyrolyzed paper toward sensitive electrochemical sensors

Scalable and green formation of graphitic nanolayers produces highly conductive pyrolyzed paper toward sensitive electrochemical sensors

Imaging of the active root current pathway under partial root-zone drying stress: A laboratory study for Vitis vinifera

Transmission Lines in Capacitance Measurement Systems: An Investigation of Receiver Structures

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