The research was carried out to investigate of main elements of salt stress response
in two strawberry cultivars, Elsanta and Elsinore. Plants were grown under 0, 10, 20 and
40 mM NaCl for 80 days. Salinity dramatically affected growth in both cultivars, although
Elsinore appeared to be more impaired than Elsanta. Moreover a significant reduction of
leaf photosynthesis, evaporation, and stomatal conductance was recorded 24 hrs after the
stress was applied in both cultivars, whereas physiological functions were differentially
restored after acclimation. However, cv. Elsanta had more efficient leaf gas exchange and
water status than cv. Elsinore. In general, Fruit yield reduced upon salinization, wheares
fruit quality concerning fruit taste, aroma, appearance, total soluble solids and titratable
acidity, did not change but rather was enhanced under moderate salinity. On the other hand
fruit quality was impaired at severe salt stress. Fruit antioxidant content and antioxidant
capacity were enhanced significantly by increasing salt concentration in both cultivars. The
oxidative effects of the stress were defined by the measures of some enzymatic activities
and lipid peroxidation. Consistently, an increase in superoxide dismutase (SOD), catalase
(CAT), peroxide dismutase (POD) enzymes and higher content of proline and soluble
proteins were observed in cv. Elsinore than in cv. Elsanta. The increase coincided with a
decrease in lipid peroxidation. The research confirmed that although strawberry cultivars
were sensitive to salinity, difference between cultivars exist; The experiment revealed that
cv. Elsanta could stand severe salt stress, which was lethal to cv. Elsinore. The parameters
measured in the previous experiment were proposed as early screening tools for the salt
stress response in nine strawberry genotypes. The results showed that, wheares Elsanta and
Elsinore cultivars had a lower dry weight reduction at 40 mM NaCl among cultivars,
Naiad, Kamila, and Camarosa were the least salt-sensitive cultivars among the screened.
| Identifer | oai:union.ndltd.org:unibo.it/oai:amsdottorato.cib.unibo.it:4888 |
| Date | 14 June 2012 |
| Creators | Alnayef, Mohammad <1980> |
| Contributors | Prosdocimi Gianquinto, Giorgio |
| Publisher | Alma Mater Studiorum - Università di Bologna |
| Source Sets | Università di Bologna |
| Language | English |
| Detected Language | English |
| Type | Doctoral Thesis, PeerReviewed |
| Format | application/pdf |
| Rights | info:eu-repo/semantics/openAccess |
Page generated in 0.0021 seconds