SALT TOLERANCE IN THE HALOPHYTE SUAEDA MARITIMA (L.) DUM. : THE EFFECT OF SALINITY ON THE CONCENTRATION OF SODIUM IN THE XYLEM

Rates of ion transport and transpiration were measured during the day and night in whole seedlings of Suaeda maritima growing over a range of salinities, in order to calculate concentrations of sodium and potassium in the xylem during these periods. Mean sodium concentration in the xylem was maximal...

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Veröffentlicht in:The New phytologist. - 1979. - 105(1987), 3 vom: 20. März, Seite 359-366
1. Verfasser: Clipson, N J W (VerfasserIn)
Weitere Verfasser: Flowers, T J
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 1987
Zugriff auf das übergeordnete Werk:The New phytologist
Schlagworte:Journal Article Salt tolerance Suaeda halophyte transpiration xylem concentration
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520 |a Rates of ion transport and transpiration were measured during the day and night in whole seedlings of Suaeda maritima growing over a range of salinities, in order to calculate concentrations of sodium and potassium in the xylem during these periods. Mean sodium concentration in the xylem was maximal at 56 mol m-3 Na with an external salinity of 200 mol m-3 NaCl. The sodium concentration in the xylem was greater in the dark than in the light at all external salinities investigated. Comparison of the external sodium with that in the xylem indicated that sodium was more strongly excluded from the transpiration stream as salinity increased. The mean concentration of potassium in the xylem declined as external NaCl concentration increased, although selectivity for potassium increased at higher salinities. Results are discussed in relation to osmotic adjustment in S. maritima 
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700 1 |a Flowers, T J  |e verfasserin  |4 aut 
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