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Cold calcium signaling in Arabidopsis involves two cellular pools and a change in calcium signature after acclimation.
Cold shock elicits an immediate rise in cytosolic free calcium concentration ([Ca2+]cyt) in both chilling-resistant Arabidopsis and chilling-sensitive tobacco (Nicotiana plumbaginifolia). InExpand
Transgenic plant aequorin reports the effects of touch and cold-shock and elicitors on cytoplasmic calcium
It is shown here that aequorin can be reconstituted in transformed plants and that it reports calcium changes induced by touch, cold-shock and fungal elicitors, which could be valuable for determining the role of calcium in intracellular signalling processes in plants. Expand
Calcium signalling in Arabidopsis thaliana responding to drought and salinity.
Calcium transients were of a similar magnitude and duration in response to both mannitol and isoosmolar concentrations of salt, suggesting that a factor other than calcium is involved in the discrimination between drought and salinity signals in Arabidopsis. Expand
Elevation of cytoplasmic calcium by caged calcium or caged inositol trisphosphate initiates stomatal closure
The use of the fluorescent Ca2+ indicator Fluo-3 to follow changes in stomatal aperture and cytoplasmicCa2+ concentration as Ca2 + or inositol 1,4,5-trisphosphate (InsP3) are released into the cell from their caged (photoactivatable) forms suggests that Ca2+. Expand
Circadian oscillations of cytosolic and chloroplastic free calcium in plants.
Tobacco and Arabidopsis plants, expressing a transgene for the calcium-sensitive luminescent protein apoaequorin, revealed circadian oscillations in free cytosolic calcium that can be phase-shiftedExpand
Dynamics of the apical vesicle accumulation and the rate of growth are related in individual pollen tubes.
Quantitative analysis of FM4-64 distribution in the apex revealed that fluctuations in fluorescence 5 to 10 microm subapically, and to a lesser extent the apical 3 microm, could be related to the periodic oscillation in pollen tube growth rate, which reveals a quantitative relationship between FM 4-64 staining and growth rate within an individual tube. Expand
Oxidative Signals in Tobacco Increase Cytosolic Calcium.
There is a role for calcium in plant responses to oxidative stress and pretreated seedlings with buthionine sulfoximine and inhibitors of ascorbate peroxidase modify the hydrogen peroxide-induced transients in [Ca2+]cyt, suggesting that these three signals mobilize different pools of intracellular calcium. Expand
Aspects of plant intelligence.
  • A. Trewavas
  • Medicine, Biology
  • Annals of botany
  • 1 July 2003
To commence use of the term intelligence with regard to plant behaviour will lead to a better understanding of the complexity of plant signal transduction and the discrimination and sensitivity with which plants construct images of their environment, and raises critical questions concerning how plants compute responses at the whole-plant level. Expand
Self-Reporting Arabidopsis Expressing pH and [Ca2+] Indicators Unveil Ion Dynamics in the Cytoplasm and in the Apoplast under Abiotic Stress1[w]
It is suggested that osmotic stress and salt stress are differently sensed, compiled, and processed in plant cells. Expand
Role of Calcium in Signal Transduction of Commelina Guard Cells.
The endogenous growth regulator abscisic acid elevated cytosolic Ca2+ levels in a minority of cells investigated, even though stomatal closure always occurred. Expand