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A postulated role for calcium oxalate in the regulation of calcium ions in the vicinity of stomatal guard cells.

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A postulated role for calcium oxalate in the regulation of calcium ions in the vicinity of stomatal guard cells. / Ruiz, L. P.; Mansfield, T. A.
In: New Phytologist, Vol. 127, No. 3, 1994, p. 473-481.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

Ruiz, LP & Mansfield, TA 1994, 'A postulated role for calcium oxalate in the regulation of calcium ions in the vicinity of stomatal guard cells.', New Phytologist, vol. 127, no. 3, pp. 473-481. https://doi.org/10.1111/j.1469-8137.1994.tb03965.x

APA

Ruiz, L. P., & Mansfield, T. A. (1994). A postulated role for calcium oxalate in the regulation of calcium ions in the vicinity of stomatal guard cells. New Phytologist, 127(3), 473-481. https://doi.org/10.1111/j.1469-8137.1994.tb03965.x

Vancouver

Ruiz LP, Mansfield TA. A postulated role for calcium oxalate in the regulation of calcium ions in the vicinity of stomatal guard cells. New Phytologist. 1994;127(3):473-481. doi: 10.1111/j.1469-8137.1994.tb03965.x

Author

Ruiz, L. P. ; Mansfield, T. A. / A postulated role for calcium oxalate in the regulation of calcium ions in the vicinity of stomatal guard cells. In: New Phytologist. 1994 ; Vol. 127, No. 3. pp. 473-481.

Bibtex

@article{efc9adcbe5fc4f80abccf7047f20478e,
title = "A postulated role for calcium oxalate in the regulation of calcium ions in the vicinity of stomatal guard cells.",
abstract = "Calcium ions are known to play an important part in signal transduction in stomatal guard cells. In Cummelina communis L., stomatal opening in isolated epidermis is strongly inhibited if the calcium concentration in the incubation medium is 0.1 mol mol m−3 or greater, It can be assumed that in the intact leaf, the apoplastic concentration of free calcium in the vicinity of the guard cells must be kept below this level if interference with stomatal functioning is to be avoided. When C. communis was grown with 15 mol m−3 calcium in the rhizosphere, the concentration of free calcium in the xylem sap in the shoot was found to be 3.76 mol m−3. A mechanism is clearly needed for reducing this concentration as the sap traverses the apoplast between the xylem and the stomatal guard cells. Evidence is presented here that the deposition of calcium oxalate in cells of the leaf achieves the necessary regulation. The protective role of the six specialized subsidiary cells in this species appears to be specially important. It is suggested that the regulation of apoplastic free calcium may take an important contribution to the effective stomatal control of gas exchange.",
keywords = "Calcium oxalate • stomata • guard cells • subsidiary cells • calcium ions",
author = "Ruiz, {L. P.} and Mansfield, {T. A.}",
year = "1994",
doi = "10.1111/j.1469-8137.1994.tb03965.x",
language = "English",
volume = "127",
pages = "473--481",
journal = "New Phytologist",
publisher = "Wiley",
number = "3",

}

RIS

TY - JOUR

T1 - A postulated role for calcium oxalate in the regulation of calcium ions in the vicinity of stomatal guard cells.

AU - Ruiz, L. P.

AU - Mansfield, T. A.

PY - 1994

Y1 - 1994

N2 - Calcium ions are known to play an important part in signal transduction in stomatal guard cells. In Cummelina communis L., stomatal opening in isolated epidermis is strongly inhibited if the calcium concentration in the incubation medium is 0.1 mol mol m−3 or greater, It can be assumed that in the intact leaf, the apoplastic concentration of free calcium in the vicinity of the guard cells must be kept below this level if interference with stomatal functioning is to be avoided. When C. communis was grown with 15 mol m−3 calcium in the rhizosphere, the concentration of free calcium in the xylem sap in the shoot was found to be 3.76 mol m−3. A mechanism is clearly needed for reducing this concentration as the sap traverses the apoplast between the xylem and the stomatal guard cells. Evidence is presented here that the deposition of calcium oxalate in cells of the leaf achieves the necessary regulation. The protective role of the six specialized subsidiary cells in this species appears to be specially important. It is suggested that the regulation of apoplastic free calcium may take an important contribution to the effective stomatal control of gas exchange.

AB - Calcium ions are known to play an important part in signal transduction in stomatal guard cells. In Cummelina communis L., stomatal opening in isolated epidermis is strongly inhibited if the calcium concentration in the incubation medium is 0.1 mol mol m−3 or greater, It can be assumed that in the intact leaf, the apoplastic concentration of free calcium in the vicinity of the guard cells must be kept below this level if interference with stomatal functioning is to be avoided. When C. communis was grown with 15 mol m−3 calcium in the rhizosphere, the concentration of free calcium in the xylem sap in the shoot was found to be 3.76 mol m−3. A mechanism is clearly needed for reducing this concentration as the sap traverses the apoplast between the xylem and the stomatal guard cells. Evidence is presented here that the deposition of calcium oxalate in cells of the leaf achieves the necessary regulation. The protective role of the six specialized subsidiary cells in this species appears to be specially important. It is suggested that the regulation of apoplastic free calcium may take an important contribution to the effective stomatal control of gas exchange.

KW - Calcium oxalate • stomata • guard cells • subsidiary cells • calcium ions

U2 - 10.1111/j.1469-8137.1994.tb03965.x

DO - 10.1111/j.1469-8137.1994.tb03965.x

M3 - Journal article

VL - 127

SP - 473

EP - 481

JO - New Phytologist

JF - New Phytologist

IS - 3

ER -