Babak ValizadehKaji; Saied Maleki; Ahmadreza Abbasifar
Abstract
Table grape is a non-climacteric fruit with a short shelf-life. The current study aimed at applying specific treatments to prolong its shelf-life and maintain qualitative characteristics during storage. In a factorial arrangement and a completely randomized design, the first factor was the storage period ...
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Table grape is a non-climacteric fruit with a short shelf-life. The current study aimed at applying specific treatments to prolong its shelf-life and maintain qualitative characteristics during storage. In a factorial arrangement and a completely randomized design, the first factor was the storage period and the second factor was the combination of warm water treatments and gum arabic (GA). The fruits were stored at 5 °C and 80% relative humidity in permanent darkness. On days 0, 20, 40, and 60 of the storage period, seven berries from each replicate were randomly sampled and analyzed for physicochemical and qualitative parameters. The storage time negatively affected the qualities of ‘Bidane-h Ghermez’ table grape fruits. This deterioration in quality was countered by the application of warm water treatments and GA coating, especially by the 45 °C+GA 5% treatment. Compared to the uncoated control group, the application of 45 °C+GA 5% caused a better maintenance of vitamin C (30.43–160.00%), TSS/TA (19.76–21.57%), anthocyanin (37.40–57.75%), antioxidant activity (7.35–36.40%), total phenol (12.01–24.49%), and sensory attributes (66.66–248.50%) in the fruits during storage. Also, this treatment caused lower levels of weight loss (53.27–45.48%), H2O2 (9.90–26.55%), and malondialdehyde (8.84–27.92%). Therefore, the application of warm water treatments and GA coating, particularly at 45 °C+GA 5%, had a remarkable role in extending the shelf-life of table grape fruits. In addition to their effective role in storage, warm water and GA are especially recommended because of their low costs.
Safa Khosravi; Babak ValizadehKaji; Ahmadreza Abbasifar
Abstract
Consumption of vegetables with high nitrate content threaten human health. Garden cress is a hyperaccumulator of nitrate and quickly accumulates a large amount of nitrate. The objective of the current study was to investigate the effects of foliar application of selenium (Se) on the morphological and ...
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Consumption of vegetables with high nitrate content threaten human health. Garden cress is a hyperaccumulator of nitrate and quickly accumulates a large amount of nitrate. The objective of the current study was to investigate the effects of foliar application of selenium (Se) on the morphological and physiochemical traits of garden cress plants. Treatments included three levels of sodium selenite (1, 2, and 4 mg L-1) and three levels of green synthesized Se nanoparticles (NPs) (1, 2, and 4 mg L-1). Most nutrient treatments, especially 1 mg L-1 Se NPs, significantly increased plant height, number of leaves, fresh and dry weights, chlorophyll a, total chlorophyll, and nitrate reductase activity of garden cress plants. The foliar application of Se, especially 1 mg L-1 Se NPs, caused a significant decrease in the level of nitrate accumulation. Under different treatments of sodium selenite and green synthesized Se NPs on garden cress plants, the concentration of Se was increased, and concentrations of zinc and phosphorus were decreased. This research highlights the implications of Se for improving the quality and quantity of garden cress plants.
Mostafa Eshghi Khas; Ahmadreza Abbasifar; Babak ValizadehKaji
Abstract
Tissue culture techniques can be beneficial for quick clonal propagation and production of disease-free plants of purple passion fruit as one of the most important medicinal and ornamental plants. These techniques are essential tools for the production of transgenic plants and high-value phytochemicals. ...
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Tissue culture techniques can be beneficial for quick clonal propagation and production of disease-free plants of purple passion fruit as one of the most important medicinal and ornamental plants. These techniques are essential tools for the production of transgenic plants and high-value phytochemicals. The present study was planned to introduce an efficient in vitro propagation for purple passion fruit(Passiflora edulis Sims.). To do so, the effect of different plant growth regulators was investigated on micropropagation medium of purple passion fruit. For proliferation stage, nodal segments were cultured in media supplemented with various combinations of different plant growth regulators including: BA (0, 2.2, 4.4 and 8.9 μM), TDZ (2.3, 4.5 and 9.1 μM), GA3 (0 and 2.9 μM) and IBA (0 and 0.5 μM). For rooting, shoots with about 1.5 cm long originating from explants were removed and cultured in half-strength MS medium containing different concentrations of auxin-based plant growth regulators including: IAA (0, 1.1, 2.9, 5.7 and 11.4 μM), IBA (1, 2.5, 4.9 and 8.9 μM), and NAA (1.1, 2.7, 5.4, 10.7 μM). For the proliferation stage, the best plant growth regulator combination was 8.9 μM BA+2.9 μM GA3+0.5 μM IBA, resulting in the maximum shoot proliferation, number of shoots per explants, and shoot length. Half-strength MS medium supplemented with 5.4 μM NAA or 8.9 μM IBA was the most effective treatment for the rooting of shoots. Gradual acclimatization of the rooted plantlets was performed and the plantlets were established in the soil successfully. The micropropagated plants did not exhibit any visually detectable variation to their mother plants.
Babak ValizadehKaji; Ahmadreza Abbasifar; Hossein Bagheri; Golnar Zandievakili; Atieh Daryabeigi
Abstract
The objective of this study was to evaluate the stenting (grafted cutting) propagation of commercial pomegranate cultivars as scions on drought tolerant genotypes as rootstocks. The effect of drought stress on nine pomegranate rootstocks was analyzed. Cultivars including ‘Daneshgah 13’, ‘Daneshgah ...
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The objective of this study was to evaluate the stenting (grafted cutting) propagation of commercial pomegranate cultivars as scions on drought tolerant genotypes as rootstocks. The effect of drought stress on nine pomegranate rootstocks was analyzed. Cultivars including ‘Daneshgah 13’, ‘Daneshgah 32’ and ‘Daneshgah 8’ that were used as rootstocks showed the maximum drought tolerance among the studied cultivars; therefore, these three rootstocks were used to investigate the stenting propagation. Furthermore, three pomegranate cultivars including ‘Malas Saveh’, ‘Robab’ and ‘Bihasteh’ were used as scions. The highest percentage of graft success (58.88%) was obtained from grafting on ‘Daneshgah 13’. In addition, the highest percentage of graft success (84.22) was found in ‘Robab’. ‘Robab’ and ‘Malas Saveh’ had the longest shoot (11.50-11.93 cm) and highest shoot fresh weight (33.66-35.00 g) when grafted on ‘Daneshgah 13’. ‘Daneshgah 13’ had higher shoot dry weight (5.47 g) compared to the other rootstocks. Regarding the scion cultivars, ‘Robab’ and ‘Malas Saveh’ showed higher shoot dry weight (6.76-6.96 g) in comparison with ‘Bihasteh’. Using ‘Daneshgah 13’ as rootstock resulted in the highest content of chlorophyll a (18.11 mg/g), chlorophyll b (8.02 mg/g) and total chlorophyll (26.13 mg/g) in the scion leaves. ‘Robab’ and ‘Malas Saveh’ had highest content of chlorophyll a (18.11-18.33 mg/g), chlorophyll b (8.58-8.62 mg/g) and total chlorophyll (26.73-26.92 mg/g) among the scion cultivars. In all three rootstocks, a negative correlation was observed between the total phenolic content and the percentage of graft success. In addition, there was a negative correlation between the total phenolic content and the percentage of graft success in ‘Bihasteh’ scion.