Mahsa Rafati Alashti; Shahryar Kazemi; Mojdeh Sadat Khayat Moghadam
Abstract
Drought stress is one of the most important factors in reducing yield and seed quality of rapeseed. The present study chiefly tries to evaluate the effect of application of brassinosteroid on seed yield, oil content, oil yield, and fatty acids profile of rapeseed genotypes under late-season water deficit ...
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Drought stress is one of the most important factors in reducing yield and seed quality of rapeseed. The present study chiefly tries to evaluate the effect of application of brassinosteroid on seed yield, oil content, oil yield, and fatty acids profile of rapeseed genotypes under late-season water deficit stresseen considered. A factorial split-plot test has been conducted in a randomized complete blocks design for two cultivation years (2017-2019) in Karaj, Iran. Experimental treatments include two levels of brassinosteroid (i.e., 0 (control) and 0.1μmol) and two levels of irrigation (full irrigation (control) and withholding irrigation from flowering stage) as factorial in the main plots, and rapeseed genotypes (Nafis, Ahmadi, Okapi, Nima, and Niloufar) as subplots. The levels of oleic acid and linoleic acid in the conditions of application of brassinosteroids have been 0.7% and 11% in full irrigation conditions and 1.1% and 6.4% in withholding irrigation conditions, respectively, compared to the control on the other hand, the use of brassinosteroids in withholding irrigation conditions reduce palmitic acid by 14% compared to the control. Okapi genotype has had the highest and lowest erucic acid and grain yield in irrigation conditions, respectively. Under drought stress conditions, the highest seed yield (3112.3 kg/ha) and the lowest amount of erucic acid (0.26%) belonged to Niloufar genotype. The use of brassinosteroids in both irrigation treatments improve the quality of fatty acids and Niloufar cultivar is recommended in both irrigation conditions
Maryam Habibi; Majid Majidian; Mohammad Rabiei
Abstract
In order to investigate the effects of boron, zinc and sulfur on yield and fatty acid composition of rapeseed(Hyola 401 cultivar), an experiment was conducted in Rasht province in 2011. A field experiment withcompletely randomized block design was performed with eight treatments in three replications.Maximum ...
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In order to investigate the effects of boron, zinc and sulfur on yield and fatty acid composition of rapeseed(Hyola 401 cultivar), an experiment was conducted in Rasht province in 2011. A field experiment withcompletely randomized block design was performed with eight treatments in three replications.Maximum grain yield (4157.6 kg ha-1) and grain oil (1770.2 kg ha-1) was obtained from S+B+Zntreatments. The highest and lowest grain oil was obtained from S+B+Zn (42.58) and control (38.37),respectively. The maximum oleic acid (234.8 mg g-1) and linolenic acid (26.68 mg g-1) and linoleic acid(55.98 mg g-1) were obtained from B+Zn+S treatments. Maximum stearic and palmitic acid were obtainedfrom control and S+Zn treatments which was 6.5 and 15.53 mg g-1, respectively. Regarding to the results,fatty acids composition of rapeseed are influenced by nutrient and since quality of edible oils depends onunsaturated fatty acids, especially linoleic and linolenic acids and these acids are essential fatty acids forthe human body that must be supplied through diet. Therefor this research showed that we are not onlyable to increase oil yield with can also increase oil quality with increasing fatty acid composition.
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.