حسن نورافکن Articles List

List of Articles حسن نورافکن

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1 - Effect of Chitosan on Physiological and Morphological Traits of Lemon Verbena (Lippia citriodora L.) under in Vitro and Field Conditions
Hassan Nourafcan
10.30495/jcep.2019.664838

Chitosan is one of the bio-elicitors that cause physiological and morphological changes in plants. To this end, two separate experiments were carried out to investigate the effect of chitosan on morphological and physiological traits of lemon verbena under in vitro and More

Chitosan is one of the bio-elicitors that cause physiological and morphological changes in plants. To this end, two separate experiments were carried out to investigate the effect of chitosan on morphological and physiological traits of lemon verbena under in vitro and field conditions. 12.5, 25, 50 and 100 ppm concentrations of chitosan were added to MS culture medium and their effects on lemon verbena growth indices were evaluated. The results showed that chitosan had a significant effect on all traits, except for the normal plantlet percentage, lateral shoots and chlorotic leaf numbers evaluated. Increasing chitosan concentrations up to 50 and 100 ppm under in vitro condition increased longest shoot length, chlorophyll content and plantlet length in lemon verbena explants but it reduced node numbers of the longest shoot when all concentrations of chitosan were used. Increasing the effect of chitosan on rooting percentage and root numbers were positive and reached the highest levels at concentrations of 50 and 100 ppm. It was also found that the shoot fresh weight, the leaf number and longest root have a positive effect on chitosan and had a better effect on concentrations less than 100 ppm. However, the use of chitosan showed irregular changes in the amount of citral. The effect of chitosan with 12.5, 25, 50 and 100 ppm concentrations were evaluated on growth indices of lemon verbena under field condition. The positive effect of chitosan concentration of 50 ppm was observed for inflorescence number, inflorescence length and leaf fresh weight. Because of positive effects of chitosan concentrations of 50 and 100 ppm, on most growth characteristics of lemon verbena in field and tissue culture conditions their applications could be recommended in plantations of this tree. Manuscript profile
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2 - Effect of Salicylic Acid on Morpho-physiological Characteristics of Lemon verbena (Lippia citriodora) in In Vitro and Field Conditions
Hassan Nourafcan

Salicylic acid (SA) is a natural phenolic and a hormone like compound, and its different concentrations and treatment duration cause many actions and reactions in plants. Thus, two experiments were conducted to evaluate the effect of salicylic acid on morphological and More

Salicylic acid (SA) is a natural phenolic and a hormone like compound, and its different concentrations and treatment duration cause many actions and reactions in plants. Thus, two experiments were conducted to evaluate the effect of salicylic acid on morphological and physiological characteristics of lemon verbena as an ornamental and medicinal plant in in vitro and field conditions at Miyaneh, Iran. In tissue culture conditions, five concentrations of SA including 0, 2.5, 5, 10 and 20 μM were added to MS culture medium and their effects on lemon verbena growth indices were evaluated. Increasing SA concentrations caused increment in chlorotic leaf number but decrement in normal plantlet percentage and lateral shoots number in lemon verbena explants. However, in low concentrations of SA, longest shoot length, leaf number and chlorophyll content were increased. Although all concentrations of SA improved shoot fresh weight in lemon verbena explants. Under field condition, the effect of salicylic acid at 2.5, 5, 10 and 20 μM concentrations, non spray and spray with distilled water, were evaluated on morphological and physiological traits of lemon verbena. Salicylic acid affected significantly leaf width, inflorescence number, fresh inflorescence and leaf weights and the longest inflorescence length. The negative effect of SA application on leaf width and number and fresh weight of inflorescence was observed. But leaf fresh weight and inflorescence length improved especially in low SA concentrations. Therefore, application of low SA concentrations, because of their enhancing potential effect on vegetative growth of lemon verbena both in field and tissue culture conditions can be recommended. Manuscript profile
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3 - Effect of Foliar Application of Chitosan and Salicylic Acid on Morphological Traits and Essential Oil Quality of Lemon Balm (Melissa officinalis L.)
Negin Safari Kamal Abadi Nasser Mohebalipour Mehdi Oraei Hasan Nourafcan Asad Asadi
10.30495/JCEP.2021.1927610.1791

Lemon balm is an aromatic and perennial bushy plant with interesting pharmacological and biological properties, which extensively distributed in the Mediterranean region and Asia. The effects of salicylic acid (50, 100, 150 and 200 mg.L-1) and chitosan (50, 100, 150 and More

Lemon balm is an aromatic and perennial bushy plant with interesting pharmacological and biological properties, which extensively distributed in the Mediterranean region and Asia. The effects of salicylic acid (50, 100, 150 and 200 mg.L-1) and chitosan (50, 100, 150 and 200 mg.L-1) foliar application on plant parameters, essential oil and chemical compositions of lemon balm at two different harvest stages (seedling and flowering) were evaluated. The results showed that the highest values of chlorophyll index obtained from foliar application of 150 and 200 mg/L chitosan. Application of chitosan (all concentration levels except 50 mg.L-1) significantly improved the plant height of lemon balm compared with the control. Leaf and dry weight of aerial parts per plant increased with increasing in salicylic acid and chitosan concentrations. The essential oil compounds of lemon balm (citronellal, caryophyllene, linalool, carvacrol, α-pinene, geraniol) at flowering harvest stage were significantly higher than the seedling harvest stage. Foliar application of chitosan was more effective than salicylic acid in increasing essential oil compounds of lemon balm. The essential oil content ranged between 0.07% and 0.09% in the seedling harvest stage and between 0.30% and 0.52% in the flowering harvest stage. The highest value of essential oil (0.52%) was recorded from the flowering harvest stage with foliar application of 200 mg.L-1 chitosan. The findings of the current study showed that both elicitors possess strong potential in biomass production and enhancement of essential oil compounds in lemon balm. Manuscript profile
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4 - Effect of Vermicompost and Liquid Seaweed Fertilizer on Morpho-physiological Properties of Marigold (Calendula officinalis L.)
Milad Heydari Amir Mohammad Daneshian Moghaddam Hassan Nourafcan

Marigold is an ornamental and medicinal plant and has also industrial in cosmetalogical uses. To evaluate the effects of vermicompost and seaweed fertilizers on some morpho-physiological properties of the plant, a factorial experiment based on a randomized complete bloc More

Marigold is an ornamental and medicinal plant and has also industrial in cosmetalogical uses. To evaluate the effects of vermicompost and seaweed fertilizers on some morpho-physiological properties of the plant, a factorial experiment based on a randomized complete block (RCB) design with three replications was conducted in pot in Mianeh. In this experiment, the first factor was vermicompost fertilizer at four levels (0, 5, 10 and 15 t.ha-1) added to the pot soil and the second factor was for levels of liquid seaweed fertilizer (0, 1, 2 and 3 percent) sprayed on foliage. The assessed traits were leaf, root and stem dry weights, root volume, number of secondary shoots, plant height, leaf number, flowering period, number of flowers, flower diameter, dry weight of flowers, leaves electrolyte leakage, leaf area (LA) and essential oil percentage and yield. The results showed that application of vermicompost increased some traits, including plant height (18.58 cm), number of branches (4.3 branches), root volume (3.4 cm³) and leaf area index (65.55 cm2). Using 3 percent of liquid seaweed fertilizer was also effective. In general, application of 5 tons per hectare of vermicompost with 3 percent of liquid seaweed fertilizer resulted in highest flower and stem dry weights. Manuscript profile

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List of Articles حسن نورافکن