Esmaeil Gholinezhad; Bakhtiar Lalehgani; Shahryar Kazemi
Abstract
In order to investigate the effect of polyamines on antioxidant activity and biochemical traits of Camelina under salinity stress conditions, a pot (as poen air) experiment was conducted at Payame Noor University (PNU), Iran in March 2022 as factorial layout based on a completely randomized design with ...
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In order to investigate the effect of polyamines on antioxidant activity and biochemical traits of Camelina under salinity stress conditions, a pot (as poen air) experiment was conducted at Payame Noor University (PNU), Iran in March 2022 as factorial layout based on a completely randomized design with 12 treatments and 3 repetitions. The salinity treatment was at three salinity levels (0, 15 and 30 dS/m) and 4 foliar spraying levels including 1- spermine (2 mM), 2- spermidine (2 mM), 3- putrescine (2 mM) and control (pure water foliar spraying). The results showed that with the increasing salinity stress, oil and protein contents and dry seed weight, chlorophyll index, shoot organic and mineral percentage decreased, but protein percentage, shoot ash percentage, soluble sugars, antioxidant activity and ion leakage percentage increased significantly. Salinity stress of 30 and 15 ds/m compared to the control, reduced the chlorophyll index (32 and 15 percent) and mineral percentage (19 and 3 percent), oil percentage (17 and 9 percent), dry oil weight in pot (62 and 21 percent) and dry seed weight (52 and 10 percent), but protein percentage (9 and 3 percent), ash percentage (33 and 30 percent), soluble sugars (32 and 20 percent) and antioxidant activity (21 and 13 percent) increased, respectively. Also, foliar spraying with polyamines increased the above traits, but decreased the percentage of ion leakage. Therefore, in order to decreasing the effects of salinity stress and increasing the dry seed and oil weights in pot, spraying with polyamines, especially spermine, is suggested.
Seyedeh nasrin Hosseini; Jalal Jalilian; esmaeil gholinezhad
Abstract
In order to investigate the effect of water deficit stress and stress modifiers on some morphological and physiological characteristics and yield of Quinoa, a pots factorial experiment, based on a completely randomized design, with 16 treatments and 6 iterations has been done during 2019 at Urmia University. ...
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In order to investigate the effect of water deficit stress and stress modifiers on some morphological and physiological characteristics and yield of Quinoa, a pots factorial experiment, based on a completely randomized design, with 16 treatments and 6 iterations has been done during 2019 at Urmia University. The first factor includes water deficit stress at four levels, stress at the vegetative growth stage, stress at the reproductive growth stage, stress at seed filling stage, and no stress (control). The second factor is foliar spraying of ascorbic acid, salicylic acid, nano-micronutrient chelate fertilizer, and control (water spray). Water deficit stress at different growth stages decreases plant height, a number of laterals, dry weight, fresh weight of vegetative organs, root volume, fresh, and dry weight of root and root length, compared to the control. However, electrolyte leakage and leaf temperature are increased. Results show that water deficit stress at post-anthesis stage decrease grain yield via decreasing 1000-grain weight. Foliar application of growth regulators by improving yield components, increase the yield of quinoa under water deficit stress condition. Therefore, according to the results, it seems that the use of stress modulators in quinoa under water deficit stress with stimulating growth and metabolism, lead to water deficit stress tolerance.
Mohammad Reza Naeini; Mahmood Esna-Ashari; Amir Hossein Khoshgoftar Manesh; Mohammad Hadi Mirzapour
Abstract
As a destructive effect of salinity, raising free radicals in root cells and thus leakage of ions is seen. In order to study the zinc effect on some of antioxidant enzymes (Catalase [CAT], Ascorbat Peroxidase [APX]) and decreasing salinity-induced by NaCl, oxidative damages in two cultivars of olive ...
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As a destructive effect of salinity, raising free radicals in root cells and thus leakage of ions is seen. In order to study the zinc effect on some of antioxidant enzymes (Catalase [CAT], Ascorbat Peroxidase [APX]) and decreasing salinity-induced by NaCl, oxidative damages in two cultivars of olive (Olea europea L.)(Frontoio and Conservollea), this pot experiment conducted, in factorial arrange and completely randomized design in three replication. One-year seedling of two olive cultivars treated with nutrition solutions involved different levels of sodium chloride (0, 40, 80, 120 mM) and zinc (0, 1, 5µ molar) of zinc sulfate (ZnSO4. 7H2O). The results showed that with increasing of salinity levels decreased root and leaf dry weight and plant height, but increased ion leakage of potassium and zinc in root and activity of CAT and APX enzymes in leaf, as well, using Zn, decreased ion leakage of potassium and zinc; whereas root and leaf dry weight, plant height, CAT and APX activity increased. Based on the results, the greater the concentration of sulfhydryl groups in roots in Frontoio variety compared to Conservolea was in acceptance with less leakage of potassium and zinc ions on the Frontoio compared to Conservolea. Therefore the Frontoio variety was more resistant to salinity in comparison with Conservolea.
Sajjad Fattahi; Mehdi Saidi; Mohammad Javad Zarea
Abstract
In order to evaluate morphological and physiological responses of lettuce plants inoculated/ non-inoculated with Piriformospora indica under salinity stress, a factorial experiment based on randomized complete block design (RCBD) with three replications was carried out under greenhouse condition. The ...
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In order to evaluate morphological and physiological responses of lettuce plants inoculated/ non-inoculated with Piriformospora indica under salinity stress, a factorial experiment based on randomized complete block design (RCBD) with three replications was carried out under greenhouse condition. The main factor was consisted of inoculated or non-inoculated seeds with the fungus and the sub-factor included three levels of irrigation water salinity (tap water with EC=0.8 dS/m as control and saline water with ECs of 4 and 8 dS/m). Salinity stress significantly decreased most of growth parameters and P. indica declined the adverse effects of salinity. An increase in fresh foliage weight and leaf area observed for plants inoculated with P. indica. These plants showed less leaf damage symptoms under stress condition. Inoculation by the fungus significantly increased the volume and the length of root in comparison with control plants. Inoculated plants contained higher concentration of proline, photosynthetic pigments and catalase enzyme activity in their leaves rather than control plants. The lowest ionic leakage was observed in P. indica-inoculated plants at EC=4 dS/m. The results revealed the usefulness of P. indica fungus in production of lettuce under salinity stress up to 4 dS/m. But inoculation with the fungus did not lead to desirable results at 8 dS/m.
ABBAS MIRZAKHANI; Mansoore Jalali
Abstract
This experiment was conducted in National Institute of Ornamental Plants for extending vase life of Anturium andranum cv. Climax cut flowers. Experiment was done based on Completely Randomized Design (CRD) with three replications and three cut flowers per replicate. Treatments included Volk oil emulsion ...
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This experiment was conducted in National Institute of Ornamental Plants for extending vase life of Anturium andranum cv. Climax cut flowers. Experiment was done based on Completely Randomized Design (CRD) with three replications and three cut flowers per replicate. Treatments included Volk oil emulsion wax coating (10, 20 and 30 percent), Thyme oil (100, 150 and 250 ppm), Salicylic acid (200, 400 and 600 ppm) and Aloe vera gel as wax coating (2.5, 5 and 7.5 percent). Sucrose (5 percent) was added to all of the treatments. After treatments some quantitative and qualitative traits were measured. Results showed that vase life of cut flowers increased significantly in volk oil wax coating 10 percent (27.33 days) than control (17.88 days), the lowest vase life was found with Thyme oil treatment. The flowers which treated with 2.5 percent of Aloe vera gel had the highest solution uptake than control. Treatment with thyme oil of 150 ppm caused the highest ion leakage (69.5 percent) compared to the others. The lowest ion leakage (10.71 percent) was obtained in Aloe vera gel treatment of 7.5 percent.