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Gewählte Publikation:

Saied, AS; Keutgen, AJ; Noga, G.
(2005): The influence of NaCl salinity on growth, yield and fruit quality of strawberry cvs. 'Elsanta' and 'Korona'
SCI HORTIC-AMSTERDAM, 103, 289-303; ISSN 0304-4238 FullText FullText_BOKU

Abstract:
In a 2-year field study, strawberry cvs. xxxElsantaxxx and xxxKoronaxxx were exposed to three different levels of NaCl salinity supplied as aqueous solutions characterised by electrical conductivities of 0.3 dS/m, 2.6 dS/m. and 5.1 dS/m. Salinity in the rhizosphere reduced plant growth by up to 44% in xxxKoronaxxx and 90% in xxxElsantaxxx. A rather distinct cultivar difference represented the reduction in leaf area per plant of 85% in the second year of experiment in xxxElsantaxxx compared to 29% in xxxKoronaxxx. Strawberry can be regarded as a Na+ excluder, because Na+ content of both strawberry cultivars remained below 3 nice g(-1) dry mass at all salinity levels. Cl- content increased considerably, up to 70 mg g(-1) dry mass in xxxKoronaxxx and 80 mg g(-1) dry mass in xxxElsantaxxx plants. xxxKoronaxxx retained most Of its Cl- in roots and crowns, whereas in xxxElsantaxxx the maximum was detected in petioles. xxxKoronaxxx was able to accumulate up to 33% higher Cl- content in the roots than xxxElsantaxxx. Macronutrient deficiency due to NaCl salinity was not observed and in comparison to xxxElsantaxxx, higher Cl- content in roots of xxxKoronaxxx did not coincide with an impairment of macronutrient uptake. Salinity stress reduced fruit yield by up to 27% in xxxKoronaxxx and 64% in xxxElsantaxxx. Fruit quality, characterised as taste, aroma, and texture by a consumer-type panel.. decreased by more than 24% in xxxElsantaxxx. but in xxxKoronaxxx differences were insignificant. Total soluble solids (Brix) and the ratio Brix/TA (TA, titratable acid) decreased significantly by about 20% in xxxKoronaxxx and 35% in xxxElsantaxxx. To summarise, the ability of xxxKoronaxxx to retain Cl- in the root system more effectively than xxxElsantaxxx resulted not only in a 41% lower leaf Cl- content at the highest salinity level and a better growth under NaCl stress, but also in a relatively higher fruit yield and fruit quality. (C) 2004 Elsevier B.V. All rights reserved.
Autor*innen der BOKU Wien:
Keutgen Anna
BOKU Gendermonitor:


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