Calcium signaling in plants

Rudd, J. J.; Franklin‐Tong, Vernonica E.

doi:10.1007/s000180050286

Cited by 80 publications

(46 citation statements)

References 113 publications

(181 reference statements)

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“…Pulses, repetitive oscillations, and sustained plateaus constitute elements of [Ca 2ϩ ] cyt signatures (Dolmetsch et al, 1997(Dolmetsch et al, , 1998Li et al, 1998), all of which have been detected in plant cells (Thuleau et al, 1998;Rudd and Franklin-Tong, 1999;Trewavas, 1999 (1) Replacement of W2 by alanine or deletion of terminal residues markedly reduced the ability of these Pep-13 derivatives to trigger the [Ca 2ϩ ] cyt response. These residues were previously reported to be essential for elicitor as well as competitor activity of Pep-13 (Nürnberger et al, 1994Zimmermann et al, 1997).…”

Section: Discussionmentioning

confidence: 99%

“…Cytoplasmic free Ca 2 ϩ ([Ca 2 ϩ ] cyt ) serves as a second messenger in plant processes as diverse as root nodule formation, phytochrome phototransduction, stomatal closure, geotropism, circadian rhythm, pollen tube growth, and stress adaptation (Rudd and Franklin-Tong, 1999). Stimulusspecific and spatially and temporally defined Ca 2 ϩ signatures of characteristic magnitude, frequency, and duration are assumed to maintain signal specificity of transduction cascades (Thuleau et al, 1998;Trewavas, 1999).…”

Section: Introductionmentioning

confidence: 99%

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Receptor-Mediated Increase in Cytoplasmic Free Calcium Required for Activation of Pathogen Defense in Parsley

et al. 2000

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INTRODUCTIONCytoplasmic free Ca 2 ϩ ([Ca 2 ϩ ] cyt ) serves as a second messenger in plant processes as diverse as root nodule formation, phytochrome phototransduction, stomatal closure, geotropism, circadian rhythm, pollen tube growth, and stress adaptation (Rudd and Franklin-Tong, 1999). Stimulusspecific and spatially and temporally defined Ca 2 ϩ signatures of characteristic magnitude, frequency, and duration are assumed to maintain signal specificity of transduction cascades (Thuleau et al., 1998;Trewavas, 1999). Subsequently, the binding of [Ca 2 ϩ ] cyt to calmodulin, Ca 2 ϩ -dependent protein kinases, Ca 2 ϩ -dependent protein phosphatases, Ca 2 ϩ -gated ion channels, or Ca 2 ϩ -activated phospholipases facilitates downstream signal transduction directed toward activation of a signal-specific cellular response (Blumwald et al., 1998).Expression of the Aequorea aequorea apoaequorin gene in the cytoplasm of plant cells provides a means for accurate, noninvasive quantification of changes in [Ca 2 ϩ ] cyt (Knight et al., 1991). When reconstituted with coelenterazine, holoaequorin acts as a bioluminescent indicator of [Ca 2 ϩ ] cyt . Since the pioneering work of Knight et al. (1991), aequorin technology has been widely applied in plants to report changes in [Ca 2 ϩ ] cyt in response to abiotic stimuli, such as touch, wind, cold, heat, and drought (Knight et al., 1991(Knight et al., , 1992(Knight et al., , 1997Haley et al., 1995;Gong et al., 1998;Plieth et al., 1999); blue light ; circadian rhythm (Johnson et al., 1995); ozone (Clayton et al., 1999); anoxia (Sedbrook et al., 1996); oxidative stress (Price et al., 1994); and hypoosmotic shock (Chandra and Low, 1997;Takahashi et al., 1997;Cessna et al., 1998).Numerous recent studies have provided evidence that Ca 2 ϩ plays a pivotal role in activating the plant's surveillance system against attempted microbial invasion (Yang et al., 1997;Scheel, 1998). Activation of plant defense is believed to be receptor mediated through recognition of pathogenderived elicitors (Yang et al., 1997;Scheel, 1998;Nürnberger, 1999). In contrast to elicitors from phytopathogenic bacteria, elicitors of fungal or oomycete origin appear to be recognized by high-affinity receptors residing in the plasma membrane of plant cells. Although several such plasma membrane binding sites have been characterized kinetically and structurally, our knowledge of the molecular mode of fungal pathogen perception in plants remains fragmentary: only one elicitor receptor has been isolated thus far, a soybean 70-kD plasma membrane protein that binds Phytophthora sojae-derived ␤ -glucans (Umemoto et al., 1997).Receptor-ligand interaction initiates an intracellular signal transduction cascade that mediates activation of the defense against the pathogen. Cellular components shown to be modulated by elicitor treatment include GTP binding proteins (Bischoff et al., 1999); plasma membrane ion channels 1 Current address: LION Bioscience AG, Im Neuenheimer Feld 515-517, D-69120 Heidelberg, Germany. 2 To whom corre...

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Receptor-Mediated Increase in Cytoplasmic Free Calcium Required for Activation of Pathogen Defense in Parsley

et al. 2000

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“…Signaling to SI-Induced PCD Ca 2+ operates as a second messenger in many signaling cascades in both plant and animal systems, including PCD (Rudd and Franklin-Tong, 1999). [Ca 2+ ] cyt is known to play a pivotal signaling role in incompatible field poppy pollen; increased [Ca 2+ ] cyt is the earliest event triggered by SI Wu et al, 2011) that involves Ca 2+ influx (Wu et al, 2011 Franklin-Tong et al, 1997), Ca 2+ and K + influx (Wu et al, 2011), inhibition of sPPase activity (Rudd et al, 1996;de Graaf et al, 2006), depolymerization and stabilization of F-actin (Snowman et al, 2002;Thomas et al, 2006;Poulter et al, 2008Poulter et al, , 2011, and rapid inhibition of incompatible pollen tube growth.…”

Section: The Involvement Of the Vacuole In Cytosolic Acidification Anmentioning

confidence: 99%

Self-Incompatibility-Induced Programmed Cell Death in Field Poppy Pollen Involves Dramatic Acidification of the Incompatible Pollen Tube Cytosol

et al. 2015

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Self-incompatibility (SI) is an important genetically controlled mechanism to prevent inbreeding in higher plants. SI involves highly specific interactions during pollination, resulting in the rejection of incompatible (self) pollen. Programmed cell death (PCD) is an important mechanism for destroying cells in a precisely regulated manner. SI in field poppy (Papaver rhoeas) triggers PCD in incompatible pollen. During SI-induced PCD, we previously observed a major acidification of the pollen cytosol. Here, we present measurements of temporal alterations in cytosolic pH ([pH] cyt ); they were surprisingly rapid, reaching pH 6.4 within 10 min of SI induction and stabilizing by 60 min at pH 5.5. By manipulating the [pH] cyt of the pollen tubes in vivo, we show that [pH] cyt acidification is an integral and essential event for SI-induced PCD. Here, we provide evidence showing the physiological relevance of the cytosolic acidification and identify key targets of this major physiological alteration. A small drop in [pH] cyt inhibits the activity of a soluble inorganic pyrophosphatase required for pollen tube growth. We also show that [pH] cyt acidification is necessary and sufficient for triggering several key hallmark features of the SI PCD signaling pathway, notably activation of a DEVDase/caspase-3-like activity and formation of SI-induced punctate actin foci. Importantly, the actin binding proteins Cyclase-Associated Protein and ActinDepolymerizing Factor are identified as key downstream targets. Thus, we have shown the biological relevance of an extreme but physiologically relevant alteration in [pH] cyt and its effect on several components in the context of SI-induced events and PCD.

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“…Herein, signal information would be encoded by a specific Ca 2+ signature that is defined by precise control of spatial, temporal, and concentration parameters of alterations in cytosolic Ca 2+ concentration. The spectrum of stimuli that evoke such Ca 2+ elevations and their stimulus-specific characteristics has been cataloged and critically discussed in a number of informative reviews (Rudd and Franklin-Tong, 1999;Sanders et al, 1999;Knight and Knight, 2001;Sanders et al, 2002;Scrase-Field and Knight, 2003). Subsequent research suggested that while the shape and spatio-temporal distribution of Ca 2+ elevations could be of critical importance for stimulus response coupling , an additional level of regulation and specificity is achieved by Ca 2+ binding proteins that function as signal sensor proteins .…”

Section: Introductionmentioning

confidence: 99%

Calcium Signals: The Lead Currency of Plant Information Processing

2010

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Ca 2+ signals are core transducers and regulators in many adaptation and developmental processes of plants. Ca 2+ signals are represented by stimulus-specific signatures that result from the concerted action of channels, pumps, and carriers that shape temporally and spatially defined Ca 2+ elevations. Cellular Ca 2+ signals are decoded and transmitted by a toolkit of Ca 2+ binding proteins that relay this information into downstream responses. Major transduction routes of Ca 2+ signaling involve Ca 2+ -regulated kinases mediating phosphorylation events that orchestrate downstream responses or comprise regulation of gene expression via Ca 2+ -regulated transcription factors and Ca 2+ -responsive promoter elements. Here, we review some of the remarkable progress that has been made in recent years, especially in identifying critical components functioning in Ca 2+ signal transduction, both at the single-cell and multicellular level. Despite impressive progress in our understanding of the processing of Ca 2+ signals during the past years, the elucidation of the exact mechanistic principles that underlie the specific recognition and conversion of the cellular Ca 2+ currency into defined changes in protein-protein interaction, protein phosphorylation, and gene expression and thereby establish the specificity in stimulus response coupling remain to be explored.

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Calcium signaling in plants

Cited by 80 publications

References 113 publications

Receptor-Mediated Increase in Cytoplasmic Free Calcium Required for Activation of Pathogen Defense in Parsley

Receptor-Mediated Increase in Cytoplasmic Free Calcium Required for Activation of Pathogen Defense in Parsley

Self-Incompatibility-Induced Programmed Cell Death in Field Poppy Pollen Involves Dramatic Acidification of the Incompatible Pollen Tube Cytosol

Calcium Signals: The Lead Currency of Plant Information Processing

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