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Where does all the calcium go? Evidence of an important regulatory role for trichomes in two calcicoles.

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Where does all the calcium go? Evidence of an important regulatory role for trichomes in two calcicoles. / de Silva, D. L. R.; Hetherington, A. M.; Mansfield, T. A.

In: Plant, Cell and Environment, Vol. 19, No. 7, 07.1996, p. 880-886.

Research output: Contribution to Journal/MagazineJournal article

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de Silva, D. L. R. ; Hetherington, A. M. ; Mansfield, T. A. / Where does all the calcium go? Evidence of an important regulatory role for trichomes in two calcicoles. In: Plant, Cell and Environment. 1996 ; Vol. 19, No. 7. pp. 880-886.

Bibtex

@article{dc114f479006468f8312a43058a7e61e,
title = "Where does all the calcium go? Evidence of an important regulatory role for trichomes in two calcicoles.",
abstract = "In previous studies of the calcicoles Centaurea scabiosa and Leontodon hispidus, the stomata on isolated epidermis closed partially when the concentration of calcium in the medium was above 1 mol m−3. This is a much smaller concentration than that believed to be delivered into the leaves in xylem sap when the plants are growing in a calcium-rich medium, and hence the mechanism for 'protecting' stomata from excessive exposure to free calcium is thought to be of great physiological significance. It is shown here that, in the leaves of both species, a substantial amount of the calcium they contain is located within meso-phyll cells, and virtually all of that which does enter the epidermis is contained within trichomes, probably as calcium oxalate. The amounts of calcium in the vicinity of the stomata thus remain small despite high concentrations elsewhere, ensuring that the essential role of Ca2+ in intra-cellular signalling in guard cells can continue to be performed without disturbance.",
keywords = "Centaurea scabiosa • Leontodon hispidus • calcicoles • calcium • stomata • trichomes",
author = "{de Silva}, {D. L. R.} and Hetherington, {A. M.} and Mansfield, {T. A.}",
year = "1996",
month = jul,
doi = "10.1111/j.1365-3040.1996.tb00424.x",
language = "English",
volume = "19",
pages = "880--886",
journal = "Plant, Cell and Environment",
issn = "0140-7791",
publisher = "Wiley",
number = "7",

}

RIS

TY - JOUR

T1 - Where does all the calcium go? Evidence of an important regulatory role for trichomes in two calcicoles.

AU - de Silva, D. L. R.

AU - Hetherington, A. M.

AU - Mansfield, T. A.

PY - 1996/7

Y1 - 1996/7

N2 - In previous studies of the calcicoles Centaurea scabiosa and Leontodon hispidus, the stomata on isolated epidermis closed partially when the concentration of calcium in the medium was above 1 mol m−3. This is a much smaller concentration than that believed to be delivered into the leaves in xylem sap when the plants are growing in a calcium-rich medium, and hence the mechanism for 'protecting' stomata from excessive exposure to free calcium is thought to be of great physiological significance. It is shown here that, in the leaves of both species, a substantial amount of the calcium they contain is located within meso-phyll cells, and virtually all of that which does enter the epidermis is contained within trichomes, probably as calcium oxalate. The amounts of calcium in the vicinity of the stomata thus remain small despite high concentrations elsewhere, ensuring that the essential role of Ca2+ in intra-cellular signalling in guard cells can continue to be performed without disturbance.

AB - In previous studies of the calcicoles Centaurea scabiosa and Leontodon hispidus, the stomata on isolated epidermis closed partially when the concentration of calcium in the medium was above 1 mol m−3. This is a much smaller concentration than that believed to be delivered into the leaves in xylem sap when the plants are growing in a calcium-rich medium, and hence the mechanism for 'protecting' stomata from excessive exposure to free calcium is thought to be of great physiological significance. It is shown here that, in the leaves of both species, a substantial amount of the calcium they contain is located within meso-phyll cells, and virtually all of that which does enter the epidermis is contained within trichomes, probably as calcium oxalate. The amounts of calcium in the vicinity of the stomata thus remain small despite high concentrations elsewhere, ensuring that the essential role of Ca2+ in intra-cellular signalling in guard cells can continue to be performed without disturbance.

KW - Centaurea scabiosa • Leontodon hispidus • calcicoles • calcium • stomata • trichomes

U2 - 10.1111/j.1365-3040.1996.tb00424.x

DO - 10.1111/j.1365-3040.1996.tb00424.x

M3 - Journal article

VL - 19

SP - 880

EP - 886

JO - Plant, Cell and Environment

JF - Plant, Cell and Environment

SN - 0140-7791

IS - 7

ER -