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Gewählte Publikation:

Keutgen, AJ; Pawelzik, E; .
(2007): Cultivar-dependent cell wall modification of strawberry fruit under NaCl salinity stress.
J Agric Food Chem. 2007; 55(18):7580-7585 FullText FullText_BOKU

Strawberry cultivars differ in their sensitivity to NaCl; fruits of cv. Elsanta suffer from softening, whereas those of cv. Korona retain their firmness. The mean fruit fresh weight is reduced in cv. Elsanta up to 46% and in cv. Korona up to 26%. Cell walls of fruits grown under 0, 40, or 80 mmol/L NaCl were extracted and analyzed. In fruits of cv. Korona, the content of the alcohol-insoluble residue remained comparatively stable as salt levels increased but was reduced in cv. Elsanta. The water-soluble pectin fraction was not affected in cv. Korona, but the content of low methoxy pectinates increased significantly, indicative of the generation of calcium and magnesium bridges that stabilize pectin polysaccharicles of cell walls. In cv. Elsanta, the content of water-soluble pectin rose, indicating pectin solubilization. For both cultivars, the significant negative correlation of fruit Cl- contents with the contents of NaOH-soluble pectinates, when expressed per fruit fresh mass, indicated that covalently bound pectic substances were degraded. Especially the response of cv. Elsanta is in line with the general observation that severe osmotic stress results in slower cell expansion and weaker cell walls.
Autor*innen der BOKU Wien:
Keutgen Anna
Find related publications in this database (using NML MeSH Indexing)
Cell Wall/chemistry*
Cell Wall/drug effects
Osmolar Concentration
Osmotic Pressure
Sodium Chloride/administration & dosage*
Species Specificity

Find related publications in this database (Keywords)
Fragaria x ananassa Duch.
fruit softening
NaCl salinity
cell wall

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