Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
}
TY - JOUR
T1 - Sodium-related partial stomatal closure and salt tolerance of Aster tripolium
AU - Kerstiens, Gerhard
AU - Tych, W
AU - Robinson, M F
AU - Mansfield, T A
PY - 2002/3
Y1 - 2002/3
N2 - When Aster tripolium is grown at high salinity, stomatal closure is induced by the presence of sodium ions in the apoplast surrounding the guard cells. The occurrence of this system in Aster tripolium and not in the closely related glycophyte Aster amellus suggests that it could be an important factor in the network of physiological attributes required for salt tolerance.Gas exchange and growth parameters were measured in Aster tripolium plants grown at different levels of salinity. A simple mechanistic model was constructed to test whether the Na-sensing feature of the guard cells was a realistic component of salinity tolerance.The model captured very well the behaviour of plants in terms of salt uptake and reduction of growth with increasing salinity. There was moderate variance between measured and modelled rates of decrease of conductance with increasing levels of salinity.No evidence was found to refute our hypothesis that stomatal closure in response to sodium plays an important role in salt tolerance of Aster tripolium.
AB - When Aster tripolium is grown at high salinity, stomatal closure is induced by the presence of sodium ions in the apoplast surrounding the guard cells. The occurrence of this system in Aster tripolium and not in the closely related glycophyte Aster amellus suggests that it could be an important factor in the network of physiological attributes required for salt tolerance.Gas exchange and growth parameters were measured in Aster tripolium plants grown at different levels of salinity. A simple mechanistic model was constructed to test whether the Na-sensing feature of the guard cells was a realistic component of salinity tolerance.The model captured very well the behaviour of plants in terms of salt uptake and reduction of growth with increasing salinity. There was moderate variance between measured and modelled rates of decrease of conductance with increasing levels of salinity.No evidence was found to refute our hypothesis that stomatal closure in response to sodium plays an important role in salt tolerance of Aster tripolium.
KW - Aster tripolium L. (Tripolium vulgare)
KW - growth
KW - identifiability
KW - salt marsh
KW - salt tolerance
KW - sea aster
KW - stomatal conductance
KW - GUARD-CELLS
KW - GROWTH
KW - ACCUMULATION
KW - HALOPHYTES
KW - SALINITY
M3 - Journal article
VL - 153
SP - 509
EP - 515
JO - New Phytologist
JF - New Phytologist
SN - 0028-646X
IS - 3
ER -