adel abdimani; Gholam Ali Akbari; elias soltani; Majid Ghorbani Javid
Abstract
The present study was conducted during the agricultural year 2021-2022 in plots with three repetitions at the research farm of Aboureihan Campus, located in the Pakdasht region of Tehran province. In this study, the light level was controlled at four levels (no shading, light-shade, shade-light and complete ...
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The present study was conducted during the agricultural year 2021-2022 in plots with three repetitions at the research farm of Aboureihan Campus, located in the Pakdasht region of Tehran province. In this study, the light level was controlled at four levels (no shading, light-shade, shade-light and complete shading). The main factor was the light control at these four levels, and the secondary factor was the planting date at three levels (20th of April, 10th of May, and 31th of May). Applying complete shading initially, and then transitioning to shade-light treatment along with planting ginger on the 20th of April, had the most significant impact on increasing all the examined traits, including yield components, yield, and the percentage of essential oil in ginger rhizomes. The two mentioned treatments (complete shading and shade-light) led to an approximately 29% increase in the number of rhizomes in ginger plants compared to both the full light treatment and the light-shading treatment. On the other hand, the highest ginger essential oil percentage (1.76%) was obtained in plants planted on the 20th of April, which did not show a significant difference compared to plants planted on the 10th of May (1.66%) but was approximately 25% higher when compared to the essential oil percentage of plants planted on the 31th of May.Therefore, the overall results demonstrated that implementing shading treatment on the planting date of 20st of April could be a promising method for significantly increasing both the quantitative and qualitative yield of ginger under similar climatic conditions.
Reza Sadeghi; Mostafa Mirzaei; Asgar Ebadollahi; Arsalan Jamshidnia; Majid Ghorbani Javid
Abstract
Indian meal moth Plodia interpunctella Hübner (Pyralidae) is one of the most important pests of storage products in Iran, which is controlled by chemical fumigants. The use of plant essential oils and their compounds can be a suitable alternative to conventional fumigants due to their low risks ...
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Indian meal moth Plodia interpunctella Hübner (Pyralidae) is one of the most important pests of storage products in Iran, which is controlled by chemical fumigants. The use of plant essential oils and their compounds can be a suitable alternative to conventional fumigants due to their low risks to mammals. The present study invesrigates the mortality, inhibition of alpha-amylase enzyme, and the total protein content of Indian meal moth larvae (Plodia interpunctella (Hübner)) affected by saffron petal extract with high concentration of anthocyanin under experimental conditions. The concentrations have been 500, 690, 1000, 1380, and 2000 ppm, used against the fifth-instar larvae of the pest in four replications within 24 and 48 h. The lethal concentration to kill fifty percentage of larvae (LC50) by saffron petal extract after 24 and 48 hours is estimated to be 2244.950 and 1434.828 ppm, respectively. Alpha-amylase enzyme activity in the fifth instar larvae of Indian meal moth, treated by saffron petal extract, has been significantly different from the control. The highest activity of the alpha-amylase enzyme in pest larvae treated by saffron petal extract has been recorded with 83.1%, and the inhibitory rate of this enzyme has been 21.8%, which is significantly different from control. Also, the amount of protein in the larvae affected by this extract significantly differs from the control groups. Therefore, due to its fumigant toxicity and the alpha-amylase inhibitory activity of Indian meal moth larvae, saffron petal extract can be considered for additional researches on managing this pest based on an ecological principle.
Marjanossadat Hosseinifard; Majid Ghorbani Javid; Elias Soltani; Iraj Allah dadi; Danial Kahrizi
Abstract
In order to evaluate the yield components, seed yield, and oil content of Camelina doubled haploid lines, an experiment has been conducted based on a randomized complete block design with 40 doubled haploid lines (as treatments) and three replications in the research farm of College of Aburaihan- the ...
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In order to evaluate the yield components, seed yield, and oil content of Camelina doubled haploid lines, an experiment has been conducted based on a randomized complete block design with 40 doubled haploid lines (as treatments) and three replications in the research farm of College of Aburaihan- the University of Tehran, Pakdasht during 2020. Since the yield characteristics and oil content of Camelina lines are unknown in the Iranian climate, the study investigates seed yield components, as well as oil yield and oil content of 40 Camelina lines. The results show a very significant difference between Camelina lines in terms of yield components, which ultimately leads to significant differences in grain yield, thus affecting the grain oil yield. Although none of the lines has had absolute superiority in all components of grain yield, in terms of final grain yield, line of 134 with 3178 and line of 110 with 3120 kg/ha are identified as superior lines. Therefore, according to the purpose of this study, in order to select the best Camelina line with maximum grain and oil yield, 134 and 110 lines are introduced and recommended as superior and promising lines that are compatible with the climatic conditions of the Pakdasht region.
Shiva Akbari; Iraj Allahdadi; Majid Ghorbani Javid; kourosh Kabiri; Elias Soltani
Abstract
In order to study the effect of slow release hydrogel-urea complex (SRHUC) on yield, yield components and physiological traits of barley under water deficit, an experiment was performed in 2017-2018 and conducted as factorial in Randomized Complete Block Design (RCBD) in three replications in greenhouse ...
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In order to study the effect of slow release hydrogel-urea complex (SRHUC) on yield, yield components and physiological traits of barley under water deficit, an experiment was performed in 2017-2018 and conducted as factorial in Randomized Complete Block Design (RCBD) in three replications in greenhouse of Aburaihan campus of University of Tehran. The combination of factorial levels were as fertilization factor containing nitrogen (N) from urea source in five levels of no use of N, equivalent 125 and 65 kg.ha-1 N (without SRHUC) as CU-N125 and CU-N65 and equivalent 125 and 65 kg.ha-1 N with SRHUC as SRHUC-N125 and SRHUC-N65 and water deficit in three levels of 70, 50 and 30% of FC. Water deficit decreased yield and yield components, RWC and SPAD. The highest grain yield in a pot belonged to SRHUC-N125 (41.9 g) and there was no significant difference between CU-N125 (41.5 g) and SRHUC-N65 (39.1 g). For most of the traits, there was no significant difference between SRHUC-N125 and SRHUC-N65 and CU-N125. Under stress, utilization of SRHUC for both N amount could generate a better biological yield and SPAD index. Using N in the form of SRHUC was preferred to using of N without SRHUC, especially under stressed conditions.
Somayeh Ehsanfar; Ali Sorooshzadeh; Seyed Ali Mohammad Modarres-Sanavy; Majid Ghorbani Javid
Abstract
To investigate the effect of polyamines on vegetative and biochemical traits of Crocus sativus L., an experiment was conducted as factorial in a randomized complete block design with three replications in 2015-2016 in Training Field of Tarbiat Modares University with three sizes of corms (3-5, 5-7 and ...
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To investigate the effect of polyamines on vegetative and biochemical traits of Crocus sativus L., an experiment was conducted as factorial in a randomized complete block design with three replications in 2015-2016 in Training Field of Tarbiat Modares University with three sizes of corms (3-5, 5-7 and 7-10 g) and five concentrations of polyamines (zero in control, zero in distilled water, spermidine 0.5 and 1 , putrescine 0.5 and 1 ) as the treatments. Results showed that plants treated with putrescine 0.5 and spermidine 1 mM had the highest germination percentage (96.56 percent) and the highest number of lateral sprouts (average number of 8.33), respectively. The length and weight of the leaves were negatively affected by polyamine treatment. The highest chlorophyll content and corm yield were observed in plants treated with Putrescine 0.5 mM and 1 mM, respectively. The content of starch and soluble carbohydrates in dormant corms at the end of growing season were not affected by polyamines significantly; however, total phenolic and flavonoid content in these corms were respectively decreased and increased as a result of applying polyamines. Having no significant effect on stigma dry weight and picrocrocin content, polyamine treatment increased the number of flowers and crocin content in small corms. It is concluded that to obtain better vegetative and biochemical traits of saffron, corms more than 7 g, treated with putrescine, should be used.
Avishan Taherkhanchi; Gholam Ali Akbari; Seyed Ali Mohammad Modarres-Sanavy; Majid Ghorbani Javid
Abstract
To evaluate the effect of bio-fertilizers on physiological traits in soybean under water deficit condition, agreenhouse experiment was conducted in 2011, at faculty of Agriculture, Tarbiat Modares University,using a factorial design based on RCBD with three replications. The experimental treatments weredifferent ...
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To evaluate the effect of bio-fertilizers on physiological traits in soybean under water deficit condition, agreenhouse experiment was conducted in 2011, at faculty of Agriculture, Tarbiat Modares University,using a factorial design based on RCBD with three replications. The experimental treatments weredifferent irrigation regimes including non-stress (40% water depletion), moderate stress (60% waterdepletion) and severe stress (80% water depletion) and four methods for application of mixed ofAzotobacter and Azosperilium on plant or seed. Results showed that the highest yield and yieldcomponents were observed in non-stress and spraying of bacteria on leaf + seed inoculation conditions.The highest catalase enzyme activity was observed in moderate stress and seed inoculation + spraying ofbacteria on leaf condition. In addition, the highest proline content was showed in severe stress and nonbacterialinoculation and was three times more than the minimum treatment. The results generallyindicated that using bio-fertilizer in moderate stress can reduce the destructive effects of stress anddecrease of yield, but severe stress led to increase of cost of production and could not effect on increasingof yield significantly.