Research Paper
Mehrasa Anvari; Davood Hashemabadi; Behzad Kaviani; Leila Asadpour
Articles in Press, Accepted Manuscript, Available Online from 01 December 2021
Abstract
The application of blue light to postharvest cut flowers is a new method to improve their vase life. This research aimed to explore the effect of blue light irradiated for different times (6, 12, 18, or 24 hours) and the pulse treatment of silver nanoparticles (SNP) (5, 10, 15, or 20 mg L-1) on the vase ...
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The application of blue light to postharvest cut flowers is a new method to improve their vase life. This research aimed to explore the effect of blue light irradiated for different times (6, 12, 18, or 24 hours) and the pulse treatment of silver nanoparticles (SNP) (5, 10, 15, or 20 mg L-1) on the vase life and the related traits of cut Alstroemeria cv. ‘Napoli’ flowers. The control plants were treated with 3% sucrose. The study was based on a completely randomized design with three replications. The results showed that the longest vase life was 22.66 days obtained from 10 mg L-1 SNP, which did not differ significantly from the treatments of 12 hours of blue light irradiation (22.00 days) and 20 mg L-1 SNP (21.66 days). The lowest fresh weight losses were observed in the treatments of blue light for 18 and 12 hours and SNP at the rate of 10 mg L-1, respectively. The highest dry matter percentage (57.34 %) was related to the plants treated with 10 mg L-1 SNP. The flowers irradiated with blue light for 12 hours had the highest chlorophyll a and b (2.52 and 1.27 mg g-1 FW, respectively), the highest catalase activity (5.26 nmol g-1 FW min-1), and the lowest polyphenol oxidase activity (0.007 μmol g-1 FW min-1). The lowest vase solution bacterial population was obtained from the application of 15 mg L-1 SNP and the highest petal protein from the irradiation of blue light for 24 hours. SNP was effective in controlling Gram-negative bacteria, and blue light was effective in controlling Gram-positive bacteria in the vase solution. It is inferred from the results that blue light, as a physical factor, is effective in preserving the vase life and relevant traits in the cut Alstroemeria ‘Napoli’ flowers.
Research Paper
Bayzid Yousefi; Kamkar Jaimand
Articles in Press, Accepted Manuscript, Available Online from 03 September 2019
Abstract
Essential oil content and compositions of 49 Iranian landraces of Damask rose (Rosa damascena Mill.) was investigated in Sanandaj (Iran) during 2004-2008. Essential oils were isolated with distillation method and component composition was determined with gas chromatography–mass spectrometry (GC/MS). ...
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Essential oil content and compositions of 49 Iranian landraces of Damask rose (Rosa damascena Mill.) was investigated in Sanandaj (Iran) during 2004-2008. Essential oils were isolated with distillation method and component composition was determined with gas chromatography–mass spectrometry (GC/MS). Twenty main compounds were identified in the essential oil representing about 90% of the total oil. The major components were found to be n-nonadecane (with seasonal range of 32.4-36.1%), n-heneicosane (20.3-22.1%), citronellol (6.6-10.3%), n-hexadecanol (6.4-6.7%) and n-tricosane (5.9-7.0%). Added to the oil content, the percentages of citronellol and geraniol as two important compounds related to rose oil quality in 2008 were more than 2007, thus, it can be inferred that dry conditions increases the aliphatic compounds percentages and reduces alcoholic compounds in rose oil. Although there were varying origin sites, climates and ecological conditions among landraces, the results of cluster analysis (CA) released that all of them with exception KB1 and AK1 showed more than 90% similarity in the major oil composition. The result of principal component analysis (PCA) revealed that the landraces of with the highest percentage of citronellol and geraniol components usually show extreme values (positive or negative) of PC1 and PC2.
Research Paper
Raoof Haghparvar Fatemeh; Davood Hashemabadi; Behzad Kaviani
Articles in Press, Accepted Manuscript, Available Online from 03 January 2022
Abstract
In addition to its ornamental and medicinal applications, marigold is considered an edible flower, too. To produce marigold with safe and non-chemical methods, a factorial experiment was conducted based on a completely randomized design with three replications and 20 treatments. The experimental treatments ...
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In addition to its ornamental and medicinal applications, marigold is considered an edible flower, too. To produce marigold with safe and non-chemical methods, a factorial experiment was conducted based on a completely randomized design with three replications and 20 treatments. The experimental treatments included two cultivars of marigold (‘Yellow’ and ‘Orange’) and three amino acids including arginine, glutamine, and proline at three levels (100, 500, and 1000 µM), as well as distilled water as the control treatment. The results showed that amino acids had positive effects on the recorded traits. The treatment of 100 µM arginine outperformed other treatments in increasing leaf number, flower diameter, shoot fresh weight, and shoot dry matter, reducing electrolyte leakage, and improving catalase activity in cv. ‘Orange’. In cv. ‘Yellow’, the highest leaf number, shoot fresh weight and root dry matter, the lowest polyphenol oxidase activity, the lowest electrolyte leakage, and the highest catalase activity were related to the treatment of 1000 µM proline. The highest total phenol was obtained from 100 µM arginine in two cultivar. With the application of amino acids, flavonoids were increased in both cultivars versus the control. Therefore, it is recommended to apply amino acids, especially arginine (100 µM) and proline (1000 µM), to produce marigolds ‘Orange’ and ‘Yellow’ in an organic way, respectively.
Research Paper
Saeed Reza Farahmandi; Saeed Samavat; Mostafa Mostafavi; Ali Mohammadi Torkashvand; Sepideh Kalatejari
Articles in Press, Accepted Manuscript, Available Online from 03 January 2022
Abstract
Vase life of cut flowers of many gerbera (Gerbera jamesonii) cultivars is typically short because of stem bending; therefore, stem bending that occurs during the early vase life period is a major problem in gerbera. Foliar application of amino acids and inorganic fertilizers is an effective practice ...
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Vase life of cut flowers of many gerbera (Gerbera jamesonii) cultivars is typically short because of stem bending; therefore, stem bending that occurs during the early vase life period is a major problem in gerbera. Foliar application of amino acids and inorganic fertilizers is an effective practice to improve plant yield in agriculture and horticulture. This experiment was carried out to improve vase life of gerbera cut flowers through changes in relative fresh weight (RFW), anthocyanin content, electrolyte leakage (EL), and stem bending. The plants were treated by foliar application of 4 and 8 g L-1 L-glutamic acid (GA), 5 and 10 g L-1 potassium (K) and nitrogen (N). The results showed the greatest RFW was observed in flowers sprayed with 4 g L-1 GA, 5 g L-1 N, and 5 g L-1 K to be 86.7%. The 20% reduction of EL was observed in flowers treated with co-application of 8 g L-1 GA, 10 g L-1 N, and 5 g L-1 K as compared to control. The main enhancement of anthocyanin concentration was corresponded to GA application. Stem bending ranged from 63.1° in gerbera flowers supplied with non-GA, 5 g L-1 N, and 5 g L-1 K to 73.9° in control plants. To sum up, 8 g L-1 GA in combination with 5 g L-1 N and 5 g L-1 K was chosen as an optimum treatment to improve vase life and decreased stem bending of gerbera cut flowers.
Research Paper
vida akhavan markazi; Rohangiz Naderi; Elham Danaee; SepidehSepideh Kalateh Jari; fereshteh nematollahi
Articles in Press, Accepted Manuscript, Available Online from 03 January 2022
Abstract
Indoor air pollution is one of the most important environmental subjects in the world with serious side effects on human health. We report the result of a three replications and factorial design experiment that assesses the effect of plants (Epipremnum aureum and Dracaena trifasciata ) on the removal ...
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Indoor air pollution is one of the most important environmental subjects in the world with serious side effects on human health. We report the result of a three replications and factorial design experiment that assesses the effect of plants (Epipremnum aureum and Dracaena trifasciata ) on the removal of indoor air pollution. To gain the objects Potted plants were placed individually in 125 liters airtight glass containers (chamber) which had a small valve to inject and sucking airs. Each plant was exposure to, benzene 25 and 50 µlit/lit, acetone 25 and 50 µlit/lit, ethanol 50 µlit/lit and methanol 50 µlit/lit during a day (24 hours). According to the biochemical examination electrolyte leakage (%) of pothos was decreased especially in acetone 25 µlit/lit. versus on treated sansevieria increased. Total chlorophyll content of sansevieria in all treatments was increased, while it was decreased when pothos exposure to benzene 25, benzene 50 µlit/lit and methanol 50 µlit/lit. Catalase activity and super oxide dismutase showed converse results. In both plant species catalase activity was decreased especially in acetone 50, however super oxide dismutase activity was increased in all treatments and in sansevieria exposure to benzene 50 µlit/lit more than others. There was no significant change in prolin content of pothos, although there was significant increase in acetone 50 µlit/lit and ethanol 50 µlit/lit of sansevieria. The results indicate when plants exposure to the benzene, tissue cells damaged more than other treatments while, acetone had least amount of tissue cell damage. According to this paper results, both plant species have the potential of indoor air pollution phytoremediation but, pothos had higher adaptability in pollutant indoor area.
Research Paper
Neda Nekouyar; Rohangiz Naderi; Davood Hashemabadi; Ali Mohammadi Torkashvand
Articles in Press, Accepted Manuscript, Available Online from 03 January 2022
Abstract
This research employed a factorial experiment based on a randomized complete block design in three replications to explore the interactive effects of gibberellic acid (GA) at three rates of 0, 150, and 300 mg L-1 and nitrogen (N) at three rates of 0, 100, and 200 mg L-1 on the traits of two violet species ...
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This research employed a factorial experiment based on a randomized complete block design in three replications to explore the interactive effects of gibberellic acid (GA) at three rates of 0, 150, and 300 mg L-1 and nitrogen (N) at three rates of 0, 100, and 200 mg L-1 on the traits of two violet species (Viola tricolor and V. odorata). The results showed that the application of GA and N significantly improved the edible traits of both species so that the highest protein, carotenoid, Fe, and Zn contents in the petals of both species were related to the treatment of ‘GA300 × N200’. The maximum petal anthocyanin content was produced by the treatment of ‘GA0 × N100’ (58.32 mg 100 g-1 FW) in the sweet violets and by the treatment of ‘GA300 × N100’ (66.84 mg 100 g-1 FW) in the commercial violets. The commercial violets were richer in Se than the sweet violets. The highest Se contents in the commercial violets were obtained from the treatments of ‘GA300 × N200’, ‘GA300 × N100’, and ‘GA150 × N200’. In both violet species, the highest flavonoid contents at the wavelengths of 300 and 330 nm were related to the treatments of ‘GA300 × N200’ and ‘GA150 × N200’. However, these treatments were ineffective in flavonoids at 270 nm. The sweet violets had a higher antioxidant capacity than the commercial violets. The highest antioxidant capacity in the sweet violets (84.83 % DPPHsc) and commercial violets (78.17 % DPPHsc) was produced with the application of ‘GA150 × N200’. Based on the results, both species are effective sources of proteins, minerals, and antioxidant compounds. As well, ‘GA300 × N200’ and ‘GA150 × N200’ are recommended for improving the edible traits of these two species.
Research Paper
Samira Nicknezhad; Davood Hashemabadi; Mohammad Sadegh Allahyari
Articles in Press, Accepted Manuscript, Available Online from 03 January 2022
Abstract
Supplying safe, natural, and inexpensive food sources for the growing population of the world is a need of contemporary societies. Edible flowers are a new natural source in humans’ food basket. In this regard, the nutritional value of five edible flowers including African marigold (Tagetes erecta ...
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Supplying safe, natural, and inexpensive food sources for the growing population of the world is a need of contemporary societies. Edible flowers are a new natural source in humans’ food basket. In this regard, the nutritional value of five edible flowers including African marigold (Tagetes erecta L.), gladiolus (Gladiolus), yucca (Yucca elephantipes), chrysanthemum (Chrysanthemum), and Hibiscus syriacus were explored. According to the results, the African marigold flowers had the highest total flavonoids (16.13 mg CE g-1 FW), total phenols (14.48 mg GAE g-1 FW), antioxidant capacity (87.89 % DPPH inhibition), vitamin C (30.60 mg 100 g-1 FW), and proteins (1.56 %). The highest carotenoids (482.57 μg g-1 FW), Fe (2.54 mg 100 g-1 FW), and Zn (0.27 mg 100 g-1 FW) were recorded by the yucca flowers. The chrysanthemum flowers exhibited the highest Ca (47.25 mg 100 g-1 FW) and Mg (2.60 mg 100 g-1 FW), and the H. syriacus flowers exhibited the highest anthocyanins (30.86 mg/100 g FW). In addition, the gladiolus flowers showed the lowest total flavonoids (11.17 mg CE g-1 FW), anthocyanins (2.14 mg 100 g-1 FW), proteins (0.52 %), Fe (0.36 mg 100 g-1 FW), Ca (9.11 mg/100 g FW), and Zn (0.14 mg 100 g-1 FW). The chrysanthemums had the lowest total phenols (0.54 mg GAE g-1 FW) and vitamin C (8.16 mg 100 g-1 FW), the yuccas had the lowest antioxidant capacity (47.76% DPPH inhibition), and the H. syriacus flowers had the lowest carotenoids (362.17 μg g-1 FW). So, given the phenol and antioxidant compounds, minerals, and proteins of the studied flowers, they can be included in the food basket of households as natural food sources