Bibliothèque Tour du Valat

Se connecter

Mot de passe oublié ?
Pas encore inscrit ?

La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Détail

Ajouter au panier

Ajouter au panier

Lien vers la notice

Titre :	Salt Spray Induces Osmotic Adjustment and Tissue Rigidity in Smooth Cordgrass, Spartina alterniflora (Loisel.)
Auteurs :	Brant W. Touchette, Auteur ; Kirsten L. Rhodes, Auteur ; Gracen A. Smith, Auteur ; Mariana Poole, Auteur
Type de document :	Article
Dans :	Estuaries and Coasts (32(5) SEP 2009)
Article en page(s) :	917-925
Résumé :	Salt spray is one of many abiotic factors that can influence plant productivity and species composition in coastal ecosystems. However, little is known about how marsh plants respond physiologically to the accumulation of sea aerosols on foliar tissues. In this study, experimental microcosms maintained in controlled greenhouse conditions were used to evaluate how low- (1.7 mg dm(-2) day(-1), weekly averages) and high- (8.6 mg dm(-2) day(-1)) salt-spray loads would influence plant-water relations in Spartina alterniflora (Loisel.). While no differences in plant performance (e.g., changes in biomass and leaf area) were observed between the treatments and control plants, a number of physiological modifications attributed to salt spray were observed. In general, salt-treated plants underwent significant decreases in water potential (I) and osmotic potential (I (pi)) and increases in leaf conductance (g) and bulk modulus of elasticity (epsilon). It is likely that these physiological responses were used to generate lower I while maintaining osmotic and water homeostasis. That is, by decreasing I (pi) and increasing g and epsilon, more efficient water flow through the soil-plant-atmosphere continuum can be achieved, thus generating lower I without promoting loss of turgor.

FAQ

Infos pratiques

Heures d'ouverture et contact

Lundi , mardi et jeudi de 9h à 12h et de 13h à 17h00 : ouverture au public ...

Liens utiles

A-
A
A+