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
Bita Sharifi; Davood Naderi
Abstract
Tuberose is one of the most important aromatic cut flower among ornamental plants that its growth and quality is influenced by the type and percentage of mineral compounds in the substrate. This study was carried out on the basis of a randomized complete design to explore the impact of feldspar, talc, ...
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Tuberose is one of the most important aromatic cut flower among ornamental plants that its growth and quality is influenced by the type and percentage of mineral compounds in the substrate. This study was carried out on the basis of a randomized complete design to explore the impact of feldspar, talc, dolomite and tuff minerals at the rate of 10, 20 and 40% incorporated with garden soil and manure on some quantitative and qualitative traits of Tuberose plants. The results showed that the highest stem diameter, floret number, root fresh and dry weight were obtained from plants grown in garden soil + dolomite + manure at the ratios of 40:40:20% and 60:20:20%. The highest stem length, floret fresh weight, content of chlorophyll b and total chlorophyll were detected in the plants treated with garden soil + talc and manure (40:40:20%). Highest daughter bulb perimeter, total bulb weight, and floret dry weight were obtained from plants treated with garden soil + feldspar + manure (40:40:20%). Highest floret length and width were seen in plants grown in garden soil + tuff + manure (70:10:20%) and garden soil + talc + manure (60:20:20%). Plants that were grown in garden soil + feldspar + manure at the ratios of 70:10:20% and 60:20:20% had the highest chlorophyll a content and the lowest daughter bulb perimeter, stem length and width, floret dry weight, width and number of floret, chlorophyll b, and total chlorophyll content respectively. Highest root dry weight was measured in control (garden soil + manure 80:20%) and the lowest root fresh and dry weights and volume were recorded for plants grown in garden soil + tuff mineral soil + manure (40:40:20%). Overall, the use of talc, dolomite, and feldspar at the ratio of 40% as Mg and K supplying minerals can improve growth and biochemical parameters of the Tuberose plant.
