Explanipedia

Under salt stress quinoa stomatal guard cells control transpiration in an ABA-primed manner Open

Shouguang Huang, Maxim Messerer, Heike M. Müller, Sönke Scherzer, M. Rob G. Roelfsema , et al. · 2025

Summary Stomatal guard cells, located at the interface between the leaf and the atmosphere, play a key role in transpiration control and photosynthetic CO 2 uptake. Halophytes like Chenopodium quinoa tolerate high soil salinity, but the me…

SISE, free LabView-based software for ion flux measurements Open

Naseer Ahmad, Krishani Tennakoon, Rainer Hedrich, Shouguang Huang, M. Rob G. Roelfsema · 2025

Plant growth and development strongly depend on the uptake of soil minerals and their distribution within plants. Various electrophysiological techniques have been developed to study these ion transport processes, from the single molecule-…

Chloride transport and homeostasis in plants Open

Harverth Silva‐Herrera, Stefanie Wege, Bastian L. Franzisky, Niaz Ahmad, M. Rob G. Roelfsema , et al. · 2025

The micronutrient chloride (Cl ― ) plays key roles in plant physiology, from photosystem II and vacuolar ATPase activity to osmoregulation, turgor maintenance and drought resilience, while also posing toxicity risks at high concentrations.…

Potassium extrusion by plant cells: evolution from an emergency valve to a driver of long‐distance transport Open

Dorsaf Hmidi, Florence Muraya, Cécile Fizames, Anne‐Aliénor Véry, M. Rob G. Roelfsema · 2024

Summary The ability to accumulate nutrients is a hallmark for living creatures and plants evolved highly effective nutrient transport systems, especially for the uptake of potassium (K + ). However, plants also developed mechanisms that en…

Guard cells count the number of unitary cytosolic Ca2+ signals to regulate stomatal dynamics Open

Shouguang Huang, M. Rob G. Roelfsema, Matthew Gilliham, Alistair M. Hetherington, Rainer Hedrich · 2024

Transient stimulus-specific increases in the cytosolic Ca²⁺ concentration ("calcium signatures") of guard cells have been proposed to regulate the opening and closure of stomatal pores on plant leaves. However, the mechanism by …

Gaining or cutting SLAC : the evolution of plant guard cell signalling pathways Open

Frances C. Sussmilch, Tobias Maierhofer, Johannes Herrmann, Lena J. Voss, Christof Lind , et al. · 2024

Summary The evolution of adjustable stomatal pores, enabling CO 2 acquisition, was one of the most significant events in the development of life on land. Here, we investigate how the guard cell signalling pathways that regulate stomatal mo…

The CIPK23 protein kinase represses SLAC1‐type anion channels in Arabidopsis guard cells and stimulates stomatal opening Open

Shouguang Huang, Tobias Maierhofer, Kenji Hashimoto, Xiangyu Xu, Sohail Mehmood Karimi , et al. · 2023

Summary Guard cells control the opening of stomatal pores in the leaf surface, with the use of a network of protein kinases and phosphatases. Loss of function of the CBL‐interacting protein kinase 23 (CIPK23) was previously shown to decrea…

The green light gap: a window of opportunity for optogenetic control of stomatal movement Open

Jeffrey J. Jones, Shouguang Huang, Rainer Hedrich, Christoph‐Martin Geilfus, M. Rob G. Roelfsema · 2022

Summary Green plants are equipped with photoreceptors that are capable of sensing radiation in the ultraviolet‐to‐blue and the red‐to‐far‐red parts of the light spectrum. However, plant cells are not particularly sensitive to green light (…

Rapid depolarization and cytosolic calcium increase go hand‐in‐hand in mesophyll cells’ ozone response Open

Maris Nuhkat, Mikael Brosché, Sonja Stoelzle‐Feix, Petra Dietrich, Rainer Hedrich , et al. · 2021

Summary Plant stress signalling involves bursts of reactive oxygen species (ROS), which can be mimicked by the application of acute pulses of ozone. Such ozone‐pulses inhibit photosynthesis and trigger stomatal closure in a few minutes, bu…

Optogenetic control of the guard cell membrane potential and stomatal movement by the light-gated anion channel Gt ACR1 Open

Shouguang Huang, Meiqi Ding, M. Rob G. Roelfsema, Ingo Drèyer, Sönke Scherzer , et al. · 2021

Expression of an anion channel rhodopsin in guard cells provides for light-controlled stomatal movements and leaf transpiration.

Gaining or cutting SLAC: the evolution of plant guard cell signalling pathways Open

Frances C. Sussmilch, Tobias Maierhofer, Johannes Herrmann, Lena J. Voss, Christof Lind , et al. · 2021

Summary The evolution of adjustable plant pores (stomata), enabling CO 2 acquisition in cuticle wax-sealed tissues was one of the most significant events in the development of life on land. But how did the guard cell signalling pathways th…

A voltage‐dependent Ca2+ homeostat operates in the plant vacuolar membrane Open

Julian Dindas, Ingo Drèyer, Shouguang Huang, Rainer Hedrich, M. Rob G. Roelfsema · 2021

Summary Cytosolic calcium signals are evoked by a large variety of biotic and abiotic stimuli and play an important role in cellular and long distance signalling in plants. While the function of the plasma membrane in cytosolic Ca 2+ signa…

Publisher Correction: The calcium-permeable channel OSCA1.3 regulates plant stomatal immunity Open

Kathrin Thor, Shushu Jiang, Erwan Michard, Jeoffrey George, Sönke Scherzer , et al. · 2020

The calcium-permeable channel OSCA1.3 regulates plant stomatal immunity Open

Kathrin Thor, Shushu Jiang, Erwan Michard, Jeoffrey George, Sönke Scherzer , et al. · 2020

Pitfalls in auxin pharmacology Open

Julian Dindas, Dirk Becker, M. Rob G. Roelfsema, Sönke Scherzer, Malcolm J. Bennett , et al. · 2020

Auxin represents a key plant hormone that functions to shape plant development and growth (Leyser, 2018). The polar transport (PAT) of indole-3-acetic acid (IAA), the major form of auxin in higher plants, is central to the physiological ou…

CATION-CHLORIDE CO-TRANSPORTER 1 (CCC1) Mediates Plant Resistance against Pseudomonas syringae Open

Baoda Han, Yunhe Jiang, Guoxin Cui, Jianing Mi, M. Rob G. Roelfsema , et al. · 2019

Plasma membrane (PM) depolarization functions as an initial step in plant defense signaling pathways. However, only a few ion channels/transporters have been characterized in the context of plant immunity. Here, we show that the Arabidopsi…

Anion channel SLAH3 is a regulatory target of chitin receptor-associated kinase PBL27 in microbial stomatal closure Open

Yi Liu, Tobias Maierhofer, Katarzyna Rybak, Jan Sklenář, Andrew Breakspear , et al. · 2019

In plants, antimicrobial immune responses involve the cellular release of anions and are responsible for the closure of stomatal pores. Detection of microbe-associated molecular patterns (MAMPs) by pattern recognition receptors (PRRs) indu…

Author response: Anion channel SLAH3 is a regulatory target of chitin receptor-associated kinase PBL27 in microbial stomatal closure Open

Yi Liu, Tobias Maierhofer, Katarzyna Rybak, Jan Sklenář, Andrew Breakspear , et al. · 2019

Calcium signals in guard cells enhance the efficiency by which abscisic acid triggers stomatal closure Open

Shouguang Huang, Rainer Waadt, Maris Nuhkat, Hannes Kollist, Rainer Hedrich , et al. · 2019

Summary During drought, abscisic acid (ABA) induces closure of stomata via a signaling pathway that involves the calcium (Ca 2+ )‐independent protein kinase OST1, as well as Ca 2+ ‐dependent protein kinases. However, the interconnection be…

Acquiring Control: The Evolution of Stomatal Signalling Pathways Open

Frances C. Sussmilch, Jörg Schultz, Rainer Hedrich, M. Rob G. Roelfsema · 2019

On the origins of osmotically driven stomatal movements Open

Frances C. Sussmilch, M. Rob G. Roelfsema, Rainer Hedrich · 2018

Contents Summary 84 I. Introduction 84 II. Stomatal form and biomechanics 85 III. Stomatal function 86 IV. Evolution of guard cell ion channels 87 V. Conclusions 88 Acknowledgements 88 Author contributions 88 References 88 Summary Stomatal…

High V‐PPase activity is beneficial under high salt loads, but detrimental without salinity Open

Dorothea Graus, Kai R. Konrad, Felix Bemm, Meliha Görkem Patir Nebioglu, Christian Lorey , et al. · 2018

Summary The membrane‐bound proton‐pumping pyrophosphatase (V‐PPase), together with the V‐type H + ‐ATPase, generates the proton motive force that drives vacuolar membrane solute transport. Transgenic plants constitutively overexpressing V‐…

Mycorrhizal lipochitinoligosaccharides (LCOs) depolarize root hairs of Medicago truncatula Open

Anna-Lena Hürter, Sébastien Fort, Sylvain Cottaz, Rainer Hedrich, Dietmar Geiger , et al. · 2018

Arbuscular Mycorrhiza and Root Nodule Symbiosis are symbiotic interactions with a high benefit for plant growth and crop production. Thus, it is of great interest to understand the developmental process of these symbioses in detail. We ana…

Guard cells in fern stomata are connected by plasmodesmata, but control cytosolic Ca2+ levels autonomously Open

Lena J. Voss, Scott A. M. McAdam, Michael Knoblauch, Jan M. Rathje, Timothy J. Brodribb , et al. · 2018

Summary Recent studies have revealed that some responses of fern stomata to environmental signals differ from those of their relatives in seed plants. However, it is unknown whether the biophysical properties of guard cells differ fundamen…

AUX1-mediated root hair auxin influx governs SCFTIR1/AFB-type Ca2+ signaling Open

Julian Dindas, Sönke Scherzer, M. Rob G. Roelfsema, Katharina von Meyer, Heike M. Müller , et al. · 2018

A Dual Role for the OsK5.2 Ion Channel in Stomatal Movements and K+ Loading into Xylem Sap Open

Thanh Hao Nguyen, Shouguang Huang, Donaldo Meynard, Christian Chaine, R. Michel , et al. · 2017

The roles of potassium channels from the Shaker family in stomatal movements have been investigated by reverse genetics analyses in Arabidopsis (Arabidopsis thaliana), but corresponding information is lacking outside this model spec…

Natural Variation in Arabidopsis Cvi-0 Accession Reveals an Important Role of MPK12 in Guard Cell CO2 Signaling Open

Liina Jakobson, Lauri Vaahtera, Kadri Tõldsepp, Maris Nuhkat, Cun Wang , et al. · 2016

Plant gas exchange is regulated by guard cells that form stomatal pores. Stomatal adjustments are crucial for plant survival; they regulate uptake of CO2 for photosynthesis, loss of water, and entrance of air pollutants such as ozone. We m…

Natural Variation in ArabidopsisCvi-0 Accession Uncovers Regulation of Guard Cell CO2Signaling by MPK12 Open

Liina Jakobson, Lauri Vaahtera, Kadri Tõldsepp, Maris Nuhkat, Cun Wang , et al. · 2016

Plant gas exchange is regulated by guard cells that form stomatal pores. Stomatal adjustments are crucial for plant survival; they regulate uptake of CO 2 for photosynthesis, loss of water and entrance of air pollutants such as ozone. We m…

Do stomata of evolutionary distant species differ in sensitivity to environmental signals? Open

M. Rob G. Roelfsema, Rainer Hedrich · 2016

This article is a commentary on Franks & Britton‐Harper, 211 : 819–827 .

Current Injection Provokes Rapid Expansion of the Guard Cell Cytosolic Volume and Triggers Ca 2+ Signals Open

Lena J. Voss, Rainer Hedrich, M. Rob G. Roelfsema · 2016

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