Sara Moghare Abed; Davood Naderi
Abstract
In the production of flowers and ornamental plants, especially in the advanced greenhouse conditions, it is important to have a good light source and its accurate management. This study aimed to evaluate the effect of light quality on morphological and biochemical traits of two Marigold genotypes (Iranian-native ...
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In the production of flowers and ornamental plants, especially in the advanced greenhouse conditions, it is important to have a good light source and its accurate management. This study aimed to evaluate the effect of light quality on morphological and biochemical traits of two Marigold genotypes (Iranian-native and Gitana). This experiment was conducted in a completely randomized design with three replications. The treatments included five light qualities including red, blue, 70% red:30% blue (70%:30%), and white lights with an intensity of 500 μmol m-2 s-1 [photosynthetic photon flux density (PPFD)] and greenhouse natural light (with an average intensity of 650 PPFD). The results showed that light quality had significant effects on all studied traits at p
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.
Hossein Shahmoradi; Davood Naderi
Abstract
To investigate the positive effects of salicylic acid (SA) on morphological and biochemical traits of salinity stress-imposed winter jasmine, an experiment was conducted in a research greenhouse. The experiment was conducted using a factorial experiment based on completely randomized design with four ...
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To investigate the positive effects of salicylic acid (SA) on morphological and biochemical traits of salinity stress-imposed winter jasmine, an experiment was conducted in a research greenhouse. The experiment was conducted using a factorial experiment based on completely randomized design with four levels of salinity stress (2, 4, 6, and 8 dS.m-1) as the first factor and different levels of SA plant hormone (control, 181 and 362 μM) as the second factor in three replications. The results showed that spraying SA on winter jasmine plants, significantly improved all studied traits such as plant height, internode distance, fresh and dry weights, flower number, flower diameter, content of protein, POD and SOD enzyme activities. The positive effects of SA was concentration dependent. Salinity stress increased the activity of peroxidase (POD) and superoxide dismutase (SOD) enzymes compared to 2 dS.m-1 salt treatment. The highest enzymatic activities were observed at 8 dS m-1. In general, according to the obtained results, it can be concluded that foliar application of SA on the plants, has the potential to reduce the negative effects of salinity stress on winter jasmine.
Davood Naderi; Esmaeil Mahmoudi
Abstract
Cucumis melo L. is one of the most economically important horticultural crops worldwide. However, low plant regeneration frequency of this plant during genetic transformation is the major hurdle for applying biotechnological approaches. Hence, this study aimed to evaluate ...
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Cucumis melo L. is one of the most economically important horticultural crops worldwide. However, low plant regeneration frequency of this plant during genetic transformation is the major hurdle for applying biotechnological approaches. Hence, this study aimed to evaluate the effect of 6-benzyladenine (BA), cefotaxime (CTX), kanamycin (KAN), and indole-3-acetic acid (IAA) on the regeneration of cotyledonary petioles generated from 6-day-old in vitro grown seedlings. Results showed that application of 1.5 mgl-1 BA plus 250 mgl-1 CTX and 1 mgl-1 BA with 1000 mgl-1 CTX formed the most efficient media for plant regeneration. The highest callus production was recorded on medium containing 1 mgl-1 BA with 250 mgl-1 CTX and 1.5 mgl-1 BA with 750 mgl-1 CTX. Medium containing 500 mgl-1 CTX plus 0.1 mgl-1 IAA efficiently induced both root \ and leaf formation. All regenerated plants were died by adding 100 mgl-1 kanamycin therefore this level considered as threshold level for kanamycin application.. Overall, the results indicated that presence of BA plays an essential role for melon regeneration and cefotaxime can be considered as an auxiliary agent.
