Masomeh Ganji; Serolah Galeshi; Hamid Jabbari; Forough Sanjarian; Benjamin Torabi
Abstract
Objective: Water stress affects the crucial processes and yield of crops. This study aimed to investigate the effect of water stress on physiological and biochemical traits of safflower genotypes.Methods: A factorial experiment was carried out as randomized complete block design in Seed and Plant Improvement ...
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Objective: Water stress affects the crucial processes and yield of crops. This study aimed to investigate the effect of water stress on physiological and biochemical traits of safflower genotypes.Methods: A factorial experiment was carried out as randomized complete block design in Seed and Plant Improvement Research Institute during 2017-19. The treatments included two irrigation levels (40 and 80% depletion of available water) and Parnian, Goldasht and Kazak genotypes. Plants were sown in soil columns with a height of 150 and a diameter of 23 cm, and irrigated by a drip system. Antioxidant enzymes, malondialdehyde, proline, relative water content, chlorophyll, seed yield and fatty acid composition were measured at the end.Results: Water stress significantly increased the accumulation of hydrogen peroxide and malondialdehyde in safflower genotypes which led to increased catalase and peroxidase enzyme activity by 1 and 2.5 U, respectively. The proline content increased about 16 times under water stress conditions. In contrast, the relative water content showed a significant decrease, which resulted in increased canopy temperature and decreased seed yield by 70%. The Kazak genotype had the lowest increase in canopy temperature under stress conditions and showed higher yield stability. Moreover, the fatty acid composition of seed oil changed and the amount of linoleic acid decreased by 1.8% under water stress conditions.Conclusion: The results showed that in addition to drought-related physiological traits, no increase in saturated/unsaturated fatty acid ratio is also an important indicator in screening superior genotypes for cultivation in water shortage.
mehdi taheri asghari
Abstract
In order to investigate the effect of municipal sewage sludge, Azotobacter, and Azospirillum on some nitrogen indices and fatty acid composition of Canola, a factorial experiment has been conducted based on randomized complete block design with three replications in the field of South Tehran Water and ...
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In order to investigate the effect of municipal sewage sludge, Azotobacter, and Azospirillum on some nitrogen indices and fatty acid composition of Canola, a factorial experiment has been conducted based on randomized complete block design with three replications in the field of South Tehran Water and Wastewater Company during 2016-2017 and 2017-2018. The experiment is a factorial experiment in a randomized complete block design with three replications. The experimental factors include canola seed inoculation in three levels (without inoculation, inoculation with azotobacter, and inoculation with azospirillum) and the use of municipal sewage sludge in five levels (control, recommended fertilizer, 10, 20, and 30 tons of sewage sludge). Results show that the interaction between seed inoculation and sewage sludge treatments on eicosanoic, palmitic, and arachidonic fatty acids has been significant at 1% and on stearic acid at 5%. Aztobacter and 30 tons of sewage sludge treatment (2680 kg/ha) has had the highest grain yield, 23.5% higher than the control treatment (2170 kg/ha). The highest amount of oleic and linoleic acid is obtained from 30 tons of sewage sludge treatment with 61.23% and 18.41%, respectively. Nitrogen uptake efficiency is the highest in fertilizer recommendation treatment with Azotobacter (16.79%). Interaction effects of inoculation and sewage sludge treatments on both trait consumption efficiency and productivity efficiency (agricultural) have been significant in terms of biomass and grain yield. Results indicate that the use of nitrogen fertilizer in proper amount, provided that it is in a timely manner, combined with inoculation could have a greater effect on productivity efficiency (agricultural) index. It can be stated that with appropriate use of sewage sludge, and necessary precautions, it can be a good substitute for nitrogen fertilizers.
Kamal Sadat Asilan
Abstract
In order to investigate the effect of nitrogen, phosphorus, and potassium elements on fatty acid profiles, oil percentage, grain yield, and flax seed oil, Lirina cultivar, a factorial experiment has been conducted during 2019, based on a randomized complete block design with three replications in Hashtgerd ...
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In order to investigate the effect of nitrogen, phosphorus, and potassium elements on fatty acid profiles, oil percentage, grain yield, and flax seed oil, Lirina cultivar, a factorial experiment has been conducted during 2019, based on a randomized complete block design with three replications in Hashtgerd research farm, Alborz Province. It has employed a factorial arrangement in a randomized complete block design with three replications with the factors involving three levels of nitrogen fertilizers (N1=30, N2=60, and N3=90 Kgha-1, three levels of phosphorus fertilizers (P1=40, P2=80, and P3=120 Kg.ha-1), and three levels of potassium fertilizers (K1=40, K2=80, and K3=120 Kg.ha-1). Result show that the highest amount of linolenic acid (43.99%), linoleic acid (17.68%), and palmitic acid (6.02%) have occurred in 30 kg. ha-1 nitrogen and 40 kg.ha-1 phosphorus. The highest amount of oleic acid (27.49%) and stearic acid (5.25%) belong to 30 kg.ha-1 phosphorus. Based on the results, the highest amount of grain yield (2384 kg.ha-1) and oil yield (939 kg.ha-1) are recorded in 90 and 120 kg.ha-1 nitrogen and phosphorus, respectively. Therefore, according to the results, different levels of fertilizer on percentage of oil has had no significant effect.
Esmaeil Khaleghi; Kazem Arzani; Norollah Moallemi; Mohsen Barzegar
Abstract
The effect of Kaolin on fruit and oil of olive cv. `Zard’ was evaluated in a commercial orchard in Fasacity, Fars Province. Mature olive trees cv. `Zard’ were sprayed with 0, 3 and 6% kaolin after 60 days, 60and 90 days and 60, 90, 120 days after full bloom. Results showed that kaolin concentration ...
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The effect of Kaolin on fruit and oil of olive cv. `Zard’ was evaluated in a commercial orchard in Fasacity, Fars Province. Mature olive trees cv. `Zard’ were sprayed with 0, 3 and 6% kaolin after 60 days, 60and 90 days and 60, 90, 120 days after full bloom. Results showed that kaolin concentration and sprayingtime had not significant effects on physicochemical parameters but they had significant effects on freefatty acids composition. linoleic acid (14.49 percent) and linolenic acid (1.02%) were lowest in the thirdlevel of spraying time. Amount of oleic acid, monounsaturated fatty acids to polyunsaturated fatty acids,oleic acid to linoleic acid were higher in oil extracted from trees treated with 3 or 6% kaolin than theuntreated trees. Also, oleic acid to linoleic acid (4.65%), monounsaturated fatty acids to polyunsaturatedfatty acids (4.2%) were the highest in 6% kaolin with thrice spraying treatment (6% kaolin × thricespraying) while linolenic acid, palmitic acid, linoleic acid were the lowest in 6% kaolin × thrice spraying.Therefore this study showed fatty acids composition was improved by kaolin spraying.
Hamid Iran nejad; Mahboobeh Poshtkoohi; Zeinab Javanmardi; Reza Amiri
Volume 11, Issue 2 , November 2009, , Pages 11-17
Abstract
The performance of nine different linseed cultivars studied in a randomized complete block design (RCB) with four replications in Varamin region (Iran) in 2006. The traits were seed yield, fatty acids, protein and oil content of linseed. The difference between cultivars was significant for all traits ...
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The performance of nine different linseed cultivars studied in a randomized complete block design (RCB) with four replications in Varamin region (Iran) in 2006. The traits were seed yield, fatty acids, protein and oil content of linseed. The difference between cultivars was significant for all traits (P< 0.01). The Legina cultivar had the highest seed yield (3000 kg/ha) and linolenic acid content (45.16 percent). The palmitic acid content of RH 14/05 cultivar, oil percent and stearic acid of GOLDA cultivar, and protein content and yield of native cultivar were higher than other cultivars (p< 0.05). The RH 14/05 cultivar which was low in linolenic acid and high in oleic acid can be used as a breeding line to produce oil.