Fatemeh Jafarpour; Davoud Bakhshi; Mahmood Ghasemnejad; Reza Hassan Sajedi
Abstract
In this study, effect of exogenous putrescine on maintaining postharvest quality and antioxidant compounds of two broccoli cultivars, ‘General’ and ‘Liberty’ during cool storage were investigated. Broccoli branchlets were treated with 0.5, 1 and 1.5 mM Putrescine. Distilled water was used as ...
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In this study, effect of exogenous putrescine on maintaining postharvest quality and antioxidant compounds of two broccoli cultivars, ‘General’ and ‘Liberty’ during cool storage were investigated. Broccoli branchlets were treated with 0.5, 1 and 1.5 mM Putrescine. Distilled water was used as control. Treated florets were put into polyethylene bag and transferred to storage with 0°C and 90% RH. Weight loss, total chlorophyll, total phenols and catechin and chlorogenic acid were determined after 40 days of cool storage and kept 2 additional days in room temperature. Results showed that 1.5 mM putrescine treatment prevented weight loss, delayed chlorophyll degradation and senescence and improved florets quality in General and Liberty cultivars. Total phenols and flavenoids content declined at the end of storage and also two additional days in room temperature, but putrescine treatments prevented its significant decreasing. Catechin and chlorogenic acid content decreased in untreated florets was decreased when transferred to room temperature after long-term storage in low temperature; but 1.5 mM putrescine increased them in both studied cultivars. Overall, application of 1.5 mM putrescine with preventing chlorophyll degradation and maintaining antioxidant compounds, delayed broccoli florets senescence.
Fatemeh Abri; Mahmood Ghasemnejad; Reza Hassan Sajedi; Davoud Bakhshi; Mohammad Ali Shiri
Abstract
In this study, effect of different concentration of ascorbic acid (AsA, 0, 2, 4 and 6 mM) on delaying senescence in cut rose flowers cv. Royall Class was investigated based on factorial design. The results showed that the greatest delay in senescence was obtained with 4 mM AsA as compared to control ...
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In this study, effect of different concentration of ascorbic acid (AsA, 0, 2, 4 and 6 mM) on delaying senescence in cut rose flowers cv. Royall Class was investigated based on factorial design. The results showed that the greatest delay in senescence was obtained with 4 mM AsA as compared to control (distilled water). Therefore, fresh weight and diameter of flowers treated with 4 mM AsA was more than others treatments. Biochemical attributes such as protein, proline, anthocyanin content and lipid per oxidation levels were determined only in DW and 4 mM AsA. Application of 4 mM AsA treatments was shown to retard degradation of protein over 8 days vase life. Proline content in AsA treated flowers was slightly lower than DW flowers but no significant differences were found in treated flowers with AsA. Anthocyanin content declined gradually with onset of senescence, while AsA treatments suppressed decreasing its content. Therefore, treatment with 4 mM AsA suppressed malondialdehyde accumulation and delayed flowers senescence.
