Structure, Function and Regulation of Primary H<sup>+</sup>and Ca<sup>2+</sup>Pumps

López‐Marqués, Rosa L.; Schiøtt, Morten; Jakobsen, Mia Kyed; Palmgren, Michael G.

doi:10.1002/9781119312994.apr0143

Cited by 3 publications

(2 citation statements)

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“…It is now widely recognized that [Ca 2+ ] i transients in guard cells and other plant cells depend on Ca 2+ from outside as well as on its release from endomembrane stores. Similarly, energy-coupled Ca 2+ transporters, both CAX antiporters mediating Ca 2+ /H + exchange and ACA Ca 2+ -ATPases, are widely distributed among all of the major membranes within the plant cell (Lopez-Marques et al, 2004;Pardo et al, 2006;Martinoia et al, 2007;Bonza and De Michelis, 2011;Pittman, 2011). These transporters ensure a capacity for Ca 2+ recovery with affinities suited to scavenging Ca 2+ across a wide range of free concentrations (Tables III and V).…”

Section: The Ca 2+ Signal Its Origins and Oscillationsmentioning

confidence: 99%

The Membrane Transport System of the Guard Cell and Its Integration for Stomatal Dynamics

2017

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Stomatal guard cells are widely recognized as the premier plant cell model for membrane transport, signaling, and homeostasis. This recognition is rooted in half a century of research into ion transport across the plasma and vacuolar membranes of guard cells that drive stomatal movements and the signaling mechanisms that regulate them. Stomatal guard cells surround pores in the epidermis of plant leaves, controlling the aperture of the pore to balance CO entry into the leaf for photosynthesis with water loss via transpiration. The position of guard cells in the epidermis is ideally suited for cellular and subcellular research, and their sensitivity to endogenous signals and environmental stimuli makes them a primary target for physiological studies. Stomata underpin the challenges of water availability and crop production that are expected to unfold over the next 20 to 30 years. A quantitative understanding of how ion transport is integrated and controlled is key to meeting these challenges and to engineering guard cells for improved water use efficiency and agricultural yields.

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Section: The Ca 2+ Signal Its Origins and Oscillationsmentioning

confidence: 99%

The Membrane Transport System of the Guard Cell and Its Integration for Stomatal Dynamics

2017

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“…-ATPase in maintenance and post-excitation restoration of the RP is well established (Lopez-Marques et al 2004;Orlova et al 1997;Trębacz et al 1994). Therefore, we used H ?…”

Section: General Characteristics Of Darkening-induced Membrane Potentmentioning

confidence: 96%

Generation of action potential-type changes in response to darkening and illumination as indication of the plasma membrane proton pump status in Marchantia polymorpha

2017

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The aim of the present study was to characterise bioelectrical changes in the membrane potential of Marchantia polymorpha gametophyte cells after light/dark transitions and to determine the role of the proton pump and energy status of the M. polymorpha cells in generation of these changes. Darkening caused persistent depolarisation of the resting potential (RP) and generation of shortlasting potential changes that were not uniform among different thalli. In some plants (18%), the changes evoked by darkening were typical action potentials (APs dark ), whereas in 69% of the plants, the changes had a form of action potential-like responses (APs dark -like) consisting of a transient depolarisation followed by a plateau phase, whose magnitude and duration were inconstant. The illumination of the M. polymorpha always evoked action potentials (APs light ) if the thallus was illuminated with light intensity of at least 120 lmol photons m -2 s -1 after 30-min darkening. To analyse the involvement of H ? -ATPase in formation of the illumination/darkening-induced electrical responses in M. polymorpha, the proton pump regulators were used. The proton pump inhibitor (20 lM FCCP) significantly diminished the RP and inhibited darkinduced AP dark and/or AP dark -like responses and illumination-induced APs light . After application of DCMU (20 lM), the RP was strongly depolarised and no response to light/dark was observed. Fusicoccin (20 lM), i.e., an activator of the proton pump, strongly hyperpolarised the membrane potential and blocked dark-induced AP dark / AP dark -like responses and illumination-induced APs light .

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Dynamic responses of Haloxylon ammodendron to various degrees of simulated drought stress

Lü

Gao

Zhang

et al. 2019

Plant Physiology and Biochemistry

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Structure, Function and Regulation of Primary H⁺and Ca²⁺Pumps

Abstract: The sections in this article arePumps in PlantsProton Pumps in Plant CellsCalcium Pumps in Plant CellsOther Plant Cation PumpsAcknowledgements

Cited by 3 publications

References 175 publications

The Membrane Transport System of the Guard Cell and Its Integration for Stomatal Dynamics

The Membrane Transport System of the Guard Cell and Its Integration for Stomatal Dynamics

Generation of action potential-type changes in response to darkening and illumination as indication of the plasma membrane proton pump status in Marchantia polymorpha

Dynamic responses of Haloxylon ammodendron to various degrees of simulated drought stress

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Structure, Function and Regulation of Primary H+and Ca2+Pumps

Abstract: The sections in this article arePumps in PlantsProton Pumps in Plant CellsCalcium Pumps in Plant CellsOther Plant Cation PumpsAcknowledgements

Cited by 3 publications

References 175 publications

The Membrane Transport System of the Guard Cell and Its Integration for Stomatal Dynamics

The Membrane Transport System of the Guard Cell and Its Integration for Stomatal Dynamics

Generation of action potential-type changes in response to darkening and illumination as indication of the plasma membrane proton pump status in Marchantia polymorpha

Dynamic responses of Haloxylon ammodendron to various degrees of simulated drought stress

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Structure, Function and Regulation of Primary H⁺and Ca²⁺Pumps