Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - The control of specificity in guard cell signal transduction.
AU - Hetherington, Alistair M.
AU - Gray, J. E.
AU - Leckie, C.
AU - McAinsh, Martin R.
AU - Ng, C.
AU - Pical, C.
AU - Priestly, A. J.
AU - Staxén, I.
AU - Webb, A. A. R.
PY - 1998/9
Y1 - 1998/9
N2 - Stomatal guard cells have proven to be an attractive system for dissecting the mechanisms of stimulus–response coupling in plants. In this review we focus on the intracellular signal transduction pathways by which extracellular signals bring about closure and opening of the stomatal pore. It is proposed that guard cell signal transduction pathways may be organized into functional arrays or signalling cassettes that contain elements common to a number of converging signalling pathways. The purpose of these signalling cassettes may be to funnel extracellular signals down onto the ion transporters that control the fluxes of ions that underlie stomatal movements. Evidence is emerging that specificity in guard cell signalling may be, in part, encoded in complex spatio–temporal patterns of increases in the concentration of cytosolic–free calcium ([Ca2+]cyt). It is suggested that oscillations in [Ca2+]cyt may generate calcium signatures that encode information concerning the stimulus type and strength. New evidence is presented that suggests that these calcium signatures may integrate information when many stimuli are present.
AB - Stomatal guard cells have proven to be an attractive system for dissecting the mechanisms of stimulus–response coupling in plants. In this review we focus on the intracellular signal transduction pathways by which extracellular signals bring about closure and opening of the stomatal pore. It is proposed that guard cell signal transduction pathways may be organized into functional arrays or signalling cassettes that contain elements common to a number of converging signalling pathways. The purpose of these signalling cassettes may be to funnel extracellular signals down onto the ion transporters that control the fluxes of ions that underlie stomatal movements. Evidence is emerging that specificity in guard cell signalling may be, in part, encoded in complex spatio–temporal patterns of increases in the concentration of cytosolic–free calcium ([Ca2+]cyt). It is suggested that oscillations in [Ca2+]cyt may generate calcium signatures that encode information concerning the stimulus type and strength. New evidence is presented that suggests that these calcium signatures may integrate information when many stimuli are present.
KW - stomata
KW - calcium
KW - signalling cassette
KW - guard cell
KW - signal transduction
KW - abscisic acid
U2 - 10.1098/rstb.1998.0304
DO - 10.1098/rstb.1998.0304
M3 - Journal article
VL - 353
SP - 1489
EP - 1494
JO - Philosophical Transactions of the Royal Society B: Biological Sciences
JF - Philosophical Transactions of the Royal Society B: Biological Sciences
SN - 0962-8436
IS - 1374
ER -