Publication date: 28th June 2024
Plant electrical signals are mediators of long-distance signaling and correlate with plant movements and responses to stress. Presently, these signals are studied with macro single surface electrodes that cannot resolve signal propagation patterns and integration, thus impeding their decoding and link to function. Unlike conventional extracellular electrodes, multielectrode (MEA) technology records the distribution patterns of electrical activity in cellular networks using a non-invasive, dense array of electrodes embedded in a substrate. The MEA technology is extensively used in brain and cardiac tissue research to decode the brain connectivity and potential propagation patterns in cardiac myocytes respectively. However, for plant electrophysiology the MEA technology remains fairly unexplored. Here we developed a conformable multielectrode array based on organic electronics for large-scale high-resolution plant electrophysiology. The MEA is developed with standard photolithography fabrication techniques, with parylene C as substrate and encapsulation layer resulting in total device thickness as low as 5 micrometers. The MEA is therefore highly conformable to the plant tissue leading to high Signal to Noise Ratio (SNR). With the conformable MEA we performed spatiotemporal mapping of the electrical activity of the carnivorous plant Dionaea muscipula a.k.a Venus Flytrap (VFT). VFT consists of a bilobed traps having three trigger hairs in each lobe which serve as mechanosensors. When the mechanosensitive hair is deflected, the mechanical stimulus is translated into an action potential (AP), by sensory cells at the base of the hair. Two action potentials (or two touches) in a short period (less than 30 secs) are required to induce closure of the trap. We found that the AP actively propagates through the tissue with constant speed and without strong directionality. We also found that spontaneously generated APs can originate from unstimulated hairs and that they correlate with trap movement. Finally, we demonstrate that the VFT circuitry can be activated by cells other than the sensory hairs. Our work reveals key properties of the AP and establishes the capacity of organic bioelectronics for resolving plants electrical signaling contributing to the mechanistic understanding of plants long-distance responses.
nanoGe is a prestigious brand of successful science conferences that are developed along the year in different areas of the world since 2009. Our worldwide conferences cover cutting-edge materials topics like perovskite solar cells, photovoltaics, optoelectronics, solar fuel conversion, surface science, catalysis and two-dimensional materials, among many others.
Previously nanoGe Spring Meeting (NSM) and nanoGe Fall Meeting (NFM), MATSUS is a multiple symposia conference focused on a broad set of topics of advanced materials preparation, their fundamental properties, and their applications, in fields such as renewable energy, photovoltaics, lighting, semiconductor quantum dots, 2-D materials synthesis, charge carriers dynamics, microscopy and spectroscopy semiconductors fundamentals, etc.
International Conference on Hybrid and Organic Photovoltaics
International Conference on Hybrid and Organic Photovoltaics (HOPV) is celebrated yearly in May. The main topics are the development, function and modeling of materials and devices for hybrid and organic solar cells. The field is now dominated by perovskite solar cells but also other hybrid technologies, as organic solar cells, quantum dot solar cells, and dye-sensitized solar cells and their integration into devices for photoelectrochemical solar fuel production.
Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics
The main topics of the Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics (IPEROP) are discussed every year in Asia-Pacific for gathering the recent advances in the fields of material preparation, modeling and fabrication of perovskite and hybrid and organic materials. Photovoltaic devices are analyzed from fundamental physics and materials properties to a broad set of applications. The conference also covers the developments of perovskite optoelectronics, including light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear optical properties, colloidal nanostructures, photophysics and light-matter coupling.
The International Conference on Perovskite Thin Film Photovoltaics Perovskite Photonics and Optoelectronics (NIPHO) is the best place to hear the latest developments in perovskite solar cells as well as on recent advances in the fields of perovskite light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear optical properties, colloidal nanostructures, photophysics and light-matter coupling.