Showing 5 results for Cut Flower
Dr. Soheila Shabanian, Dr. Maryam Nasr Esfahani, Dr. Roya Karamian,
Volume 9, Issue 38 (8-2020)
Abstract
Gerbera is an important commercial cut flower that its vase life is usually short due to vascular occlusion. In this study, we assessed the effect of ethanol (2%) in prolonging the vase life, fresh weight, relative water uptake and some physiological and biochemical factors in the stem of two cultivars of gerbera cut flowers (‘Bayadère’ and ‘Sunway’). Ethanol extended the vase life of cut flowers of both cultivars as compared with their control and its effect was better on ‘Sunway’ than on ‘Bayadère’. Application of ethanol in vase solution decreased proline content in the stem of cut flowers of both cultivars, showing alleviation of water stress in ethanol-treated cut flowers. The use of ethanol in vase solution decreased polyphenol oxidase and increased phenylalanine ammonialyase activity, which was followed by increase in total phenols and flavonoids and finally was resulted in improved postharvest performance of ethanol-treated gerbera cultivars. In addition, we observed a decrease in malondialdehyde accumulation in the stem of ethanol-treated gerbera cultivars, which was associated with the better performance of antioxidant systems in these cut flowers because oxidative stress is one of the causes that reduce postharvest performance in cut flowers. Therefore, the application of ethanol is suggested as a cheap and environmentally friendly approach to improve postharvest performance of cut flowers.
Zeynab Bazyar, Mohamadreza Salehi Salmi, Babak Pakdaman Sardrood, Ahmad Zare,
Volume 11, Issue 50 (12-2022)
Abstract
In this research, to study the effect of drought stress on the morpho-physiological traits of two hybrid cultivars of lily, ʻMerluzaʼ and ʻNashvilleʼ, a factorial, completely randomized design-based experiment with four replicates was performed with potted plants in the experimental greenhouses of the department of Horticultural Science, Faculty of Agriculture, Agricultural Sciences and Natural Resources, University of Khuzestan. The experimental factors included four irrigation levels (irrigation at the rate of 100, 80, 60, and 40% rate of field capacity) and two lily cultivars, ʻNashvilleʼ with yellow, and ʻMerluzaʼ with white flowers. The results indicated that the reduction of irrigation rate had significant impact on the evaluated traits. Stalk height and the number of flowers reduced with the reduction of soil water content, whereas the fresh: dry weight ratio of petal increased. However, no significant difference was found in this trait between 80 and 100% rate of field capacity. The activity of catalase antioxidant enzyme, increased as the irrigation rate decreased, however, this increase in ʻNashvilleʼ was higher than ʻMerluzaʼ. Although with both cultivars, catalase activity and soluble carbohydrate level were higher under drought stress, severe stress at 40% rate of field capacity led to reduced protein content, ramped down catalase activity and diminished rate of soluble carbohydrates. Generally, the results of the present study indicated that although both cultivars well tolerated mild drought stress of 80% rate of field capacity, severe stress at 40% rate of field capacity led to serious damages in both lily cultivars. Also, lily ʻNashvilleʼ cultivar expressed more tolerance than ʻMerluzaʼ cultivar via the mechanisms such as increased carbohydrate content and peroxidase activity that resulted in the reduced peroxidation of lipids.
Azin Haratian, Forogh Mortazaeinezhad, Sepideh Kalateh Jari, Foad Fatehi,
Volume 11, Issue 51 (12-2022)
Abstract
In recent years, in the world and in Iran as well, attention to Lisianthus flowers has been such that its production has increased significantly. With the increase in the production of Lisianthus cut flowers, attention to nutrition and application of treatments to improve the growth and storability of this flower is felt more than ever. For this purpose, the effect of karrikin, salicylic acid and humic acid on the morphological and biochemical characteristics of Lisianthus was investigated in a factorial experiment in a completely randomized design with three replications. The studied treatments included application of karrikin (0, 1 and 2 mg.l-1) as irrigation, salicylic acid (0, 100 and 200 mg.l-1) and humic acid (0, 50 and 100 mg.l-1) as foliar application. The results showed that the application of salicylic acid 100 mg.l-1 had the greatest effect on morphological and biochemical parameters, meanwhile, in some traits such as shoot dry weight and leaf area, a concentration of 200 mg.l-1 was more effective. Also, the use of humic acid increased the leaves and roots fresh and dry weight by increasing root expansion. karrikin treatment 1 mg.l-1 increased the number of leaves, stem length and diameter and number of flowering stems, fresh and dry weight of roots, number of seed capsules and number of buds per branch. karrikin in combination with humic acid and especially salicylic acid with synergistic effect improved some parameters such as number of roots and leaves and flowering stems and the activity of phenylalanine ammonialyase (PAL). Concomitant use of salicylic acid 100 mg.l-1 with humic acid 50 mg.l-1 as foliar application and application of Karrikin 1 mg.l-1 as a plant solution is recommended to improve growth parameters and the quality of lisianthus flowers.
Ladan Mobaraki, Javad Rezapour Fard, Parviz Noruzi,
Volume 12, Issue 57 (12-2023)
Abstract
In order to evaluate the pre-harvest application of calcium silicate and calcium chelate effects on some morpho-physiological characteristics of ‘Dolce Vita’ cut rose in the post-harvest stage, a factorial study was conducted based on a completely randomized design with 3 replications under hydroponic cultivation in a commercial greenhouse. Application of calcium silicate at concentrations of 100, 100, 200 and 400 mg.L-1 and calcium chelate at concentrations of 0, 25, 50 and 100 mg.L-1 in the pre-harvest stage was done by foliar spraying once a week for a month. In this study, morphological (fresh and dry weight of shoots) and physiological indices (chlorophyll a and b, leaves and petals flavonoids, total soluble sugar contents and calcium, silicon and potassium contents of leaves) were measured. The results showed that the application of 100 mg/l of calcium chelate and 200 mg/l of calcium silicate increased the fresh weight and dry weight of flowers (by 2.88 and 3.09 times, respectively), chlorophyll a content (91.85 percent), and the amount of soluble sugar in leaves and petals (2.27 and 1.5 times, respectively) compared to the control. The application of calcium chelate and calcium silicate at concentrations of 400 mg.L-1 and 100 mg.L-1 respectively, caused the highest amount of chlorophyll b (95.9 mg.g-1 of fresh weight) and the longest vase life (6.33 days increase compared to the control). The highest amount of petal flavonoid (1.02 mg.g-1 of fresh weight) was recorded in the concentrations of 100 mg.L-1 of calcium chelate and 200 mg.L-1 of calcium silicate, which was not significantly different from the other treatments except the control. Leaf calcium content was only affected by 100 mg.L-1 calcium chelate (53.84% increase compared to the control). The highest concentration of leaf potassium in the treatment of 100 mg.L-1 of calcium silicate and 25 mg.L-1 of calcium chelate (75.23% increase) and the highest concentration of leaf silicon in the treatment of 200 mg.L-1 calcium silicate and 50 mg.L-1 of calcium chelate (an increase of 1.03-fold compared to the control) were recorded. The results showed that the application of calcium chelate and calcium silicate at concentrations of 100 mg.L-1 and 200 mg.L-1, respectively, were more effective in improving the postharvest properties of rose cut flowers. In general, it can be stated that the combined application of calcium silicate and calcium chelate in the pre-harvest stage could improve the postharvest quality of ‘Dolce Vita’ rose flowers.
Hossein Sarikhani Khorami, Ahmad Ershadi, Davod Asghari, Mehdi Ghabooli,
Volume 13, Issue 63 (12-2024)
Abstract
Gerbera flowers from the Asteraceae family are one of the most widely used cut flowers around the world. Improving the production and post-harvest life of flowers is one of the most important research issues in the cut flower industry. In this study, the effect of supplementary lighting (red 100%, red 83% and blue 17%, red 66% and blue 34% and no lighting) and inoculation with Piriformospora indica was studied on growth, yield and some biochemical changes of Gerbera jasmonica 'Dune' using a factorial experiment based on a completely randomized design with three replications. Inoculation with Piriformospora increased photosynthetic pigments and improved the fresh and dry weight of shoots and roots, as well as leaf number and leaf area, while reducing antioxidant enzyme activities. Different supplemental light treatments similarly improved shoot growth, while red + blue light had more impact on concentrations of chlorophyll a and carotenoids, root growth, length of flower stem, and number of flowers in comparison with 100% red light. Supplementary lighting, especially 66% red and 34% blue, increased proline concentration and antioxidant enzyme activities. Based on the results, employing supplementary light, especially 66% red and 34% blue, combined with inoculation with Piriformospora enhanced plant growth and antioxidant enzyme activities via increasing photosynthetic pigments and carbohydrate production, finally resulting in increased flowers with higher flower diameter and stem length.
