Auxin induces an increase of Ca2+ concentration in the cytosol of wheat leaf protoplasts

Шишова, М. Ф.; Lindberg, Sylvia

doi:10.1016/j.jplph.2003.12.005

Cited by 50 publications

(42 citation statements)

References 44 publications

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“…For example, treatment with exogenous auxin increases cytosolic Ca 2þ concentrations in wheat protoplasts (Shishova and Lindberg, 2004). Additionally, mutation of CAX1, which encodes a Ca 2þ transporter, alters expression of the auxin-responsive IAA28: b-glucuronidase reporter gene (Cheng et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

Regulation of Telomerase in Arabidopsis by BT2, an Apparent Target of TELOMERASE ACTIVATOR1

et al. 2007

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Telomerase, an enzyme essential for the synthesis and maintenance of telomeric DNA and the long-term stability of the genome, is developmentally regulated in plants. Telomerase activity is abundant in reproductive organs but low or undetectable in vegetative organs. Treatment with exogenous auxin, however, overrides this developmental control and induces telomerase in mature leaves. The Arabidopsis thaliana transcription factor TELOMERASE ACTIVATOR1 (TAC1) potentiates some responses to auxin, including the induction of telomerase activity in leaves. Here, we report that BT2, a protein with BTB, TAZ, and calmodulin binding domains, is an essential component of the TAC1-mediated telomerase activation pathway. Steady state concentration of BT2 mRNA increases in response to TAC1 expression, and TAC1 specifically binds the BT2 promoter both in vitro and in yeast one-hybrid assays. Constitutive expression of BT2 induces telomerase activity in leaves, whereas a null mutation of BT2 blocks TAC1-mediated telomerase induction, indicating that BT2 acts downstream of TAC1 to regulate telomerase activity in mature vegetative organs.

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Section: Introductionmentioning

confidence: 99%

Regulation of Telomerase in Arabidopsis by BT2, an Apparent Target of TELOMERASE ACTIVATOR1

et al. 2007

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“…Hence, the suggested phenomenon might indicate common mechanisms of signaling. Elevation of [Ca 2+ ] cyt induced by auxin is shown to be in the range of about 100 nM (Felle, 1988;Shishova and Lindberg, 2004). This is enough to activate the secretory system within 10-20 s after the increase in Ca 2+ concentration (Sutter, Homann, and Thiel, 2000).…”

Section: Plant Sciencementioning

confidence: 91%

“…The internal pool of Ca 2+ also was shown to be important, but the absence of extracellular calcium at the proper concentration led to delay in the auxin-induced elevation of its cytosolic concentration (Shishova and Lindberg, 2004). Cytosol acidification started with A23187 Ca 2+ ionophore, and this effect was blocked by vanadate, which revealed the role of H + -ATPase in Ca 2+ -dependent pH decrease (Shishova and Lindberg, 2004). Moreover, [Ca 2+ ] cyt elevation is not only the one primary rapid reaction.…”

Section: Auxin As a Regulator Of Pm Proton Pump Activitymentioning

confidence: 99%

“…Millimolar extracellular Ca 2+ concentration was important for auxin-induced reactions, including acidification (Ayling and Clarkson, 1994;2004). The internal pool of Ca 2+ also was shown to be important, but the absence of extracellular calcium at the proper concentration led to delay in the auxin-induced elevation of its cytosolic concentration (Shishova and Lindberg, 2004). Cytosol acidification started with A23187 Ca 2+ ionophore, and this effect was blocked by vanadate, which revealed the role of H + -ATPase in Ca 2+ -dependent pH decrease (Shishova and Lindberg, 2004).…”

Section: Auxin As a Regulator Of Pm Proton Pump Activitymentioning

confidence: 99%

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Proton pump and plant cell elongation

Кирпичникова

Chen

Teplyakova

et al. 2018

BioComm

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Plant cell elongation growth is an integral process involved in different plant movements (tropisms); it provides the possibility to reach different resources of energy, water and nutrition and is therefore important for metabolism and development. Cell multiple enlargement along the longitudinal axis is commonly accepted to be under the control of the phytohormone auxin. One of the key enzymes involved in elongation is the plasma membrane H + -ATPase, which is known to acidify the cell wall. Investigation of the role of the proton pump at the plasma membrane was initiated by Prof. Vsevolod V. Polevoi and still is in progress in the group of Prof. Maria F. Shishova at the Department of Plant Physiology and Biochemistry, St. Petersburg State University. Different mechanisms of post-translation regulation of H + -pump activity are discussed in this review. We also suggest a possible scheme of elongation growth based on the shift in plant cell sensitivity to auxin and on its facility to elongate.

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“…), enabling it to influence stomatal aperture regulation, responses to light, responses to biotic and abiotic stresses, immunity and responses to multiple plant hormones, including responses to auxin [18]- [20]. Exogenous application of both synthetic and natural auxins can induce rapid, and transient increases in cytosolic Ca 2+ concentration in wheat leaf protoplasts [21], maize coleoptile and root cells [22] [23], parsley hypocotyls [22], and Arabidopsis roots [24]. In nearly all cases, the increase of cytosolic Ca 2+ concentration occurred within minutes after auxin application, demonstrating that auxin is a potent inducer of Ca 2+ signals.…”

Section: Introductionmentioning

confidence: 99%

Interactions of Auxinic Compounds on Ca2+ Signaling and Root Growth in <i>Arabidopsis thaliana</i>

Teaster¹,

Sparks²,

Blancaflor³

et al. 2015

AJPS

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Auxinic-like compounds have been widely used as weed control agents. Over the years, the modes of action of auxinic herbicides have been elucidated, but most studies thus far have focused on their effects on later stages of plant growth. Here, we show that some select auxins and auxiniclike herbicides trigger a rapid elevation in root cytosolic calcium levels within seconds of application. Arabidopsis thaliana plants expressing the Yellow-Cameleon (YC) 3.60 calcium reporter were treated with indole-3-acetic acid (IAA), indole-3-butyric acid (IBA), 1-naphthalene acetic acid (NAA), and two synthetic herbicides, 2,4-dichlorophenoxyacetic acid (2,4-D) and mecoprop [2-(4-chloro-2-methylphenoxy) propanoic acid], followed by monitoring cytosolic calcium changes over a 10 minute time course. Seconds after application of compounds to roots, the Ca 2+ signaling-mediated pathway was triggered, initiating the plant response to these compounds as monitored and recorded using Fluorescence Resonance Energy Transfer (FRET)-sensitized emission imaging. Each compound elicited a specific and unique cytosolic calcium signature. Also primary root development and elongation was greatly reduced or altered when exposed at two concentrations (0.10 and 1.0 µM) of each compound. Within 20 to 25 min after triggering of the Ca 2+ signal, root growth inhibition could be detected. We speculate that differences in calcium signature among the tested auxins and auxinic herbicides might correlate with their variation and potency with regard to root growth inhibition.

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Auxin induces an increase of Ca2+ concentration in the cytosol of wheat leaf protoplasts

Cited by 50 publications

References 44 publications

Regulation of Telomerase in Arabidopsis by BT2, an Apparent Target of TELOMERASE ACTIVATOR1

Regulation of Telomerase in Arabidopsis by BT2, an Apparent Target of TELOMERASE ACTIVATOR1

Proton pump and plant cell elongation

Interactions of Auxinic Compounds on Ca2+ Signaling and Root Growth in <i>Arabidopsis thaliana</i>

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Auxin induces an increase of Ca2+ concentration in the cytosol of wheat leaf protoplasts

Cited by 50 publications

References 44 publications

Regulation of Telomerase in Arabidopsis by BT2, an Apparent Target of TELOMERASE ACTIVATOR1

Regulation of Telomerase in Arabidopsis by BT2, an Apparent Target of TELOMERASE ACTIVATOR1

Proton pump and plant cell elongation

Interactions of Auxinic Compounds on Ca2+ Signaling and Root Growth in &lt;i&gt;Arabidopsis thaliana&lt;/i&gt;

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Interactions of Auxinic Compounds on Ca2+ Signaling and Root Growth in <i>Arabidopsis thaliana</i>