RefDoc
Haut

Faire une nouvelle recherche
Make a new search
Lancer la recherche


Titre du document / Document title

Protection of plasma membrane of onion epidermal cells by glycinebetaine and proline against NaCl stress

Auteur(s) / Author(s)

MANSOUR M. M. F. (1) ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

(1) Department of Botany, Faculty of Science, Ain Shams University, Cairo 11566, EGYPTE

Résumé / Abstract

To test the hypothesis that glycinebetaine (GB) or proline (Pro) may have a specific effect on the plasma membrane under salt stress, Allium cepa bulb scale inner epidermal cells were exposed for 3 h to 150 mM NaCI before or after GB or Pro treatments at different regimes. Two concentrations of GB or Pro were applied (50 or 100 mM). Plasma membrane permeability for individual intact cells and cell viability were measured to determine whether GB or Pro counteract the deleterious Na-induced alterations of the cell membrane. The NaCI treatment increased membrane permeability for urea and methylurea, and the number of cells with swollen protoplasm. It also enhanced cell death. GB or Pro added before, after, or simultaneously with NaCI significantly prevented Na-induced cellular alterations; exposure to GB or Pro prior to salt treatment had the greatest protective effect. GB was more effective as a membrane protectant than Pro. Both concentrations of GB or Pro had about the same effect suggesting high concentrations of GB or Pro are not required for the stabilization of the cell membrane. In conclusion, it is evident that cell membrane protection under salinity stress can be provided by GB or Pro thus leading to increased salt tolerance in plants.

Revue / Journal Title

Plant physiology and biochemistry    ISSN  0981-9428   CODEN PPBIEX 

Source / Source

1998, vol. 36, no10, pp. 767-772 (36 ref.)

Langue / Language

Anglais

Editeur / Publisher

Elsevier, Paris, FRANCE  (1987) (Revue)

Mots-clés anglais / English Keywords

Osmoregulation

;

Protection

;

Epidermis

;

Salinity

;

Plasma membrane

;

Cell permeability

;

Viability

;

Salt resistance

;

Allium cepa

;

Proline

;

Glycine

;

Betaine

;

Osmoticum

;

Liliaceae

;

Monocotyledones

;

Angiospermae

;

Spermatophyta

;

Vegetable crop

;

Mots-clés français / French Keywords

Osmorégulation

;

Protection

;

Epiderme

;

Salinité

;

Membrane plasmique

;

Perméabilité cellulaire

;

Viabilité

;

Résistance sel

;

Allium cepa

;

Proline

;

Glycine

;

Bétaïne

;

Osmoticum

;

Liliaceae

;

Monocotyledones

;

Angiospermae

;

Spermatophyta

;

Plante légumière

;

Mots-clés espagnols / Spanish Keywords

Osmoregulación

;

Protección

;

Epidermis

;

Salinidad

;

Membrana plasmática

;

Permeabilidad celular

;

Viabilidad

;

Resistencia sal

;

Allium cepa

;

Prolina

;

Glicina

;

Liliaceae

;

Monocotyledones

;

Angiospermae

;

Spermatophyta

;

Planta leguminosa

;

Localisation / Location

INIST-CNRS, Cote INIST : 10570, 35400007150031.0090

Nº notice refdoc (ud4) : 2422100



Faire une nouvelle recherche
Make a new search
Lancer la recherche
Bas