Energization of Plant Cell Membranes by H<sup>+</sup>-Pumping ATPases: Regulation and Biosynthesis

Sze, Heven; Li, Xuhang; Palmgren, Michael G.

doi:10.1105/tpc.11.4.677

Cited by 309 publications

(286 citation statements)

References 110 publications

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“…KCO/TPK1 (in total 6 KCO/TPK genes) (V) SV K + , Ca 2+ currents TPC1 (V) InsP 3 -, InsP 6 , and cADPR-activated Ca 2+ release channels NA (V) CDPK-activated anion current NA PM = plasma membrane; V = vacuolar membrane (tonoplast). If not enough information is available to definitively localize the entire gene family, or if different family members are known to localize to multiple membrane types, then no intracellular location is listed.…”

Section: H + -Atpases: Properties and Regulationmentioning

confidence: 99%

“…and Arabidopsis show that blue light activates the H + -ATPase through a phosphorylation/ dephosphorylation-based mechanism [6,7]. When inactive, the C terminus of the H + -ATPase acts as an autoinhibitory domain.…”

Section: H + -Atpases: Roles In Guard Cell Signal Transductionmentioning

confidence: 99%

“…Vacuoles serve as a H + sink, and the accumulation of H + into the vacuole depends on the activity of vacuolar-type H + -ATPases (V-ATPases) [6] and H + translocating pyrophosphatases (V-PPases). Regulation of these enzymes can thus affect the secondary messenger, pH cyt [128,129].…”

Section: Vacuolar Ion Transporters: Properties and Regulationmentioning

confidence: 99%

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Roles of ion channels and transporters in guard cell signal transduction

2007

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Stomatal complexes consist of pairs of guard cells and the pore they enclose. Reversible changes in guard cell volume alter the aperture of the pore and provide the major regulatory mechanism for control of gas exchange between the plant and the environment. Stomatal movement is facilitated by the activity of ion channels and ion transporters found in the plasma membrane and vacuolar membrane of guard cells. Progress in recent years has elucidated the molecular identities of many guard cell transport proteins, and described their modulation by various cellular signal transduction components during stomatal opening and closure prompted by environmental and endogenous stimuli.

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Section: H + -Atpases: Properties and Regulationmentioning

confidence: 99%

Section: H + -Atpases: Roles In Guard Cell Signal Transductionmentioning

confidence: 99%

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Roles of ion channels and transporters in guard cell signal transduction

2007

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“…Charophyte algae, some fungi, and land plants are characterized by a very negative membrane potential ()150 to )250 mV), due to a vanadate-sensitive H + -pumping ATPase (Spanswick, 1972;Spanswick, 1980;Spanswick, 1981;Sze et al, 1999). The electrical characteristics are dominated by the plasma membrane, which is more negative and has a lower conductance than the tonoplast (Spanswick & Williams, 1964;Beilby & Shepherd, 1989).…”

Section: Comparisons Between Salt-tolerant Charophytes and Valonia/vementioning

confidence: 99%

Electrophysiology of Turgor Regulation in Marine Siphonous Green Algae

2006

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Abstract. We review electrophysiological measures of turgor regulation in some siphonous green algae, primarily the giant-celled marine algae, Valonia, and Ventricaria, with particular comparison to the well studied charophyte algae Chara and Lamprothamnium. The siphonous green algae have a less negative plasma membrane potential, and are unlikely to have a proton-based chemiosmotic transport system, dominated by active electrogenic K + uptake. We also make note of the unusual cellular structure of the siphonous green algae. Hypertonic stress, due to increased external osmotic pressure, is accompanied by positive-going potential difference (PD), increase in conductance, and slow turgor-regulation. The relationship between these is not yet resolved, but may involve changes in K + conductance (G K ) or active K + transport at both membranes. Hypotonic turgor regulation, in response to decrease external osmotic pressure, is 3 times faster than hypertonic turgor regulation. It is accompanied by a negative-going PD, although conductance also increases. The conductance increase and the magnitude of the PD change are strongly correlated with the magnitude of hypotonic stress.

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“…Nas plantas, em diversas condições fisiológicas e de estresse, o pirofosfato pode assumir o papel do ATP, atuando como doador de energia metabólica da célula (Stitt, 1998). No tonoplasto, a H + -PPase é funcional na energização dos sistemas de transporte secundários da membrana vacuolar, atuando também no controle da homeostase citoplasmática, em sincronismo com a V-ATPase de tonoplasto e com a H + -ATPase de plasmalema (Rea et al, 1992;Sze et al, 1999).…”

Section: Introductionunclassified

Atividade ATPásica e pirofosfatásica em microssomos de raízes de milho colonizadas com fungos micorrízicos arbusculares

Ramos

Martins

Façanha

2005

Rev. Bras. Ciênc. Solo

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RESUMONo presente trabalho, foi avaliada a influência de duas espécies de fungos micorrízicos arbusculares (FMAs) Glomus clarum e Gigaspora margarita sobre as atividades ATPásica e pirofosfatásica de microssomos obtidos por meio de fracionamento celular de raízes de milho colonizadas aos 20, 30, 40 e 60 dias do plantio. Ambos os fungos proporcionaram aumentos significativos nas atividades das ATPases e pirofosfatases; entretanto, as maiores atividades foram observadas nas raízes colonizadas pelo fungo G. clarum. Os dados cinéticos indicaram a presença de uma ativação diferencial das H + -ATPases e H + -pirofosfatases presentes nas membranas das células radiculares, dependendo da espécie fúngica e do estádio da colonização das raízes pelos FMAs. Como indicadores da eficiência da micorrização, foram avaliados a altura e o conteúdo de nutrientes na parte aérea das plantas. Os dados obtidos mostraram a primeira evidência cinética de estimulação de atividade pirofosfatásica em membranas microssomais de raízes colonizadas e descreveram um padrão inédito de ativação diferencial para a hidrólise de ATP, dependendo da espécie (G. clarum ou G. margarita) e do estádio de colonização.

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Energization of Plant Cell Membranes by H⁺-Pumping ATPases: Regulation and Biosynthesis

Cited by 309 publications

References 110 publications

Roles of ion channels and transporters in guard cell signal transduction

Roles of ion channels and transporters in guard cell signal transduction

Electrophysiology of Turgor Regulation in Marine Siphonous Green Algae

Atividade ATPásica e pirofosfatásica em microssomos de raízes de milho colonizadas com fungos micorrízicos arbusculares

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Energization of Plant Cell Membranes by H+-Pumping ATPases: Regulation and Biosynthesis

Cited by 309 publications

References 110 publications

Roles of ion channels and transporters in guard cell signal transduction

Roles of ion channels and transporters in guard cell signal transduction

Electrophysiology of Turgor Regulation in Marine Siphonous Green Algae

Atividade ATPásica e pirofosfatásica em microssomos de raízes de milho colonizadas com fungos micorrízicos arbusculares

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Energization of Plant Cell Membranes by H⁺-Pumping ATPases: Regulation and Biosynthesis