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Delayed modifications in plant-water relations in the coastal marsh halophyte Spartina patens following sudden increases in soil salinity
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Kara E. Salpeter
Published/Copyright:
March 29, 2012
Abstract
Little is known about how upper marsh plants (growing in freshwater) will respond physiologically to sudden increases in salinity. In this study, we used experimental microcosms to evaluate changes in plant-water relations in the halophyte Spartina patens following increases in soil salinity (salinity levels: 15, 30, and 45). There was a delay (by 3–5 weeks) in the lowering of leaf water potential (ψleaf), stomatal conductance (g), and tissue water content (θ) in plants subjected to salinities of 30–45. These physiological delays in plant-water adjustments following sudden increases in salinity may be an adaptation of S. patens that allows it to effectively exploit higher habitat elevations that receive intermittent seawater inundations without promoting costly physiological modifications.
Keywords: bulk modulus of elasticity; osmotic potential; salt avoidance; salt tolerance; Spartina patens; water potential
Received: 2011-10-18
Accepted: 2012-2-22
Published Online: 2012-03-29
Published in Print: 2012-06-01
©2012 by Walter de Gruyter Berlin Boston
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Keywords for this article
bulk modulus of elasticity;
osmotic potential;
salt avoidance;
salt tolerance;
Spartina patens;
water potential
Articles in the same Issue
- Masthead
- Masthead
- Research Articles
- Fucoid assemblages on the north coast of Spain: past and present (1977–2007)
- New record of Sargassum denticarpum Ajisaka (Fucales, Phaeophyceae) from Iriomote Island (Ryukyu Archipelago, Japan)
- Seasonal periodicity and reproduction of brown algae (Phaeophyceae) at Puerto Deseado (Patagonia)
- Determining bathymetric distributions of the eelgrass Zostera marina L. in three turbid estuaries on the eastern North Pacific coast
- Morphological and molecular evidence demonstrates the amphi-Atlantic distribution of Laurencia catarinensis (Ceramiales, Rhodophyta)
- Effects of temperature, salinity, irradiance, and nutrients on the development of carposporelings and tetrasporophytes in Gracilaria domingensis (Kütz.) Sonder ex Dickie (Rhodophyta, Gracilariales)
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