Sahar Toupchizadeh Tabrizian; Jafar Hajilou; Sahebali Bolandnazar; Gholamreza Dehghan
Abstract
Strawberry is one of the most important commercial fruits. This research aimed to ameliorate the negative effects of water deficit stress using silicon application on strawberry. The experiment was conducted as a factorial in a completely randomized design with three factors including cultivar (‘Selva’ ...
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Strawberry is one of the most important commercial fruits. This research aimed to ameliorate the negative effects of water deficit stress using silicon application on strawberry. The experiment was conducted as a factorial in a completely randomized design with three factors including cultivar (‘Selva’ and ‘Gavioita’), Na2SiO3 (Sodium silicate) concentrations [0, 3, and 6 mM), as the source of silicon, and water deficit stress (40%, 60%, 80%, and 100% of field capacity (FC)], in three replications. ‘Gavioita’ cultivar showed the highest superoxide dismutase enzyme activity in leaves under sever water deficit stress (40% of FC) following Na2SiO3 (3 and 6 mM concentrations) application. Application of Na2SiO3 at concentration of 6 mM increased the catalase enzyme activity significantly in the leaves of ‘Gavioita’cultivar under severe water deficit stress (40% of FC). The activity of peroxidase enzyme was enhanced considerably under 80% of FC and lower water deficit in the fruits of both cultivars. The fruit total anthocyanin level was increased significantly by application of Na2SiO3 at 3 and 6 mM concentrations under water deficit stress (60% of FC). Also, Na2SiO3 (at concentrations of 3 and 6 mM) enhanced the proline level significantly in ‘Gavioita’ cultivar compared to the control treatment under normal conditions (100% of FC). In conclusion, the results of present study indicated that application of Na2SiO3 at 6 mM concentration is useful treatment to cope with sever water deficit stress (40% of FC) especially in ‘Gavioita’ cultivar of strawbery
parvaneh Mohammadi-Benaruiyeh; Gholam Reza Sharifi-Sirchi
Abstract
Concerning highly restricted application of chemicals in postharvest technology of horticultural crops, it is necessary to introduce the safe methods for preserving food or methods of food preservation. This study aimed to improve quality and prolong storage life of strawberry fruit by application of ...
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Concerning highly restricted application of chemicals in postharvest technology of horticultural crops, it is necessary to introduce the safe methods for preserving food or methods of food preservation. This study aimed to improve quality and prolong storage life of strawberry fruit by application of grape seed and fruit skin extracts and to compare them with calcium chloride as a chemical. In this study, strawberry fruit was individually immersed in the 1% and 2% CaCl2 solutions, seed and skin extracts (1 and 2 mg L-1) and then placed in polyethylene packaging for 24 d at 5±1 °C. Measurements of firmness, titrable acid, pH, weight loss, total antioxidant capacity, total phenolic, anthocyanin, vitamin C, enzymes' activity including catalase, peroxidase, and polyphenol oxidase and decay were carried out at 0, 6, 12, 18, and 24 d of storage. All applied treatments caused a significant effect on measured parameters including weight loss, titratable acidity, decay percentage and firmness, maintenance of anthocyanin and vitamin C contents, total phenolic, and antioxidant capacity. However, grape skin extract and grape seed extract showed the best results. Therefore, it can be concluded that Shiraz dark grape seed and skin extracts have the potential to control the decay incidence, prolong the storage life and preserve of postharvest valuable attributes of strawberry.
