ArticlePlant physiology1998
Strontium-induced repetitive calcium spikes in a unicellular green alga
Article in Plant physiology, 1998. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.
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Who cites it
13 citing papers in PubMed, 56 citations in OpenAlex.
- Calcium Signals from the Vacuole.Plants (Basel, Switzerland) · 2013Review
- Towards the Physics of Calcium Signalling in Plants.Plants (Basel, Switzerland) · 2013Review
- Calcium efflux systems in stress signaling and adaptation in plants.Frontiers in plant science · 2011Article
- Copper-induced calcium release from ER involves the activation of ryanodine-sensitive and IP(3)-sensitive channels in Ulva compressa.Plant signaling & behavior · 2010Article
- Cytoplasmic calcium increases in response to changes in the gravity vector in hypocotyls and petioles of Arabidopsis seedlings.Plant physiology · 2008Article
- Regulation of TRPM2 by extra- and intracellular calcium.The Journal of general physiology · 2007Article
- Calcium: just another regulator in the machinery of life?Annals of botany · 2005Review
- Pharmacological analysis of nod factor-induced calcium spiking in Medicago truncatula. Evidence for the requirement of type IIA calcium pumps and phosphoinositide signaling.Plant physiology · 2002Article
- Mobilization of Ca2+ by cyclic ADP-ribose from the endoplasmic reticulum of cauliflower florets.Plant physiology · 2001Article
- Plant calcium signaling and monitoring: pros and cons and recent experimental approaches.Protoplasma · 2001Review
- Cooperative block of the plant endomembrane ion channel by ruthenium red.Biophysical journal · 1999Article
- Elevation of the cytosolic free [Ca2+] is indispensable for the transduction of the Nod factor signal in alfalfa.Plant physiology · 1999Article
- Communicating with calciumThe Plant cell · 1999Article
Corrections and comments
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Authors and funding
7 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The divalent cation Sr2+ induced repetitive transient spikes of the cytosolic Ca2+ activity [Ca2+]cy and parallel repetitive transient hyperpolarizations of the plasma membrane in the unicellular green alga Eremosphaera viridis. [Ca2+]cy measurements, membrane potential measurements, and cation analysis of the cells were used to elucidate the mechanism of Sr2+-induced [Ca2+]cy oscillations. Sr2+ was effectively and rapidly compartmentalized within the cell, probably into the vacuole. The [Ca2+]cy oscillations cause membrane potential oscillations, and not the reverse. The endoplasmic reticulum (ER) Ca2+-ATPase blockers 2,5-di-tert-butylhydroquinone and cyclopiazonic acid inhibited Sr2+-induced repetitive [Ca2+]cy spikes, whereas the compartmentalization of Sr2+ was not influenced. A repetitive Ca2+ release and Ca2+ re-uptake by the ER probably generated repetitive [Ca2+]cy spikes in E. viridis in the presence of Sr2+. The inhibitory effect of ruthenium red and ryanodine indicated that the Sr2+-induced Ca2+ release from the ER was mediated by a ryanodine/cyclic ADP-ribose type of Ca2+ channel. The blockage of Sr2+-induced repetitive [Ca2+]cy spikes by La3+ or Gd3+ indicated the necessity of a certain influx of divalent cations for sustained [Ca2+]cy oscillations. Based on these data we present a mathematical model that describes the baseline spiking [Ca2+]cy oscillations in E. viridis.
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Registered trials
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