Miad Haji Mahmoodi; Abdolmahdi Bakhshande; Seyed Amir Moosavi; seyed ata Siadat
Abstract
Aging and salinity stress are main challenges towards of producing a healthy seedling. This research was conducted to investigate the effects of seed aging on the seed germination properties of Wild mustard under salinity stress condition. Experimental treatments were five levels of seed aging 0, 24, ...
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Aging and salinity stress are main challenges towards of producing a healthy seedling. This research was conducted to investigate the effects of seed aging on the seed germination properties of Wild mustard under salinity stress condition. Experimental treatments were five levels of seed aging 0, 24, 48, 72 and 96 h and different levels of salinity stress 0, 100, 200, 300, 400 and 500 mmol. Seed germination, germination rate and seed vigor were declined at high salinity concentrations. Catalase activity and total seed protein content were decrease due to the aging. Seed protein content (1.4 mg/g fw) declined about 92% and reach to 0.1 mg/g fw after 96h of aging. Catalase activity was decrease due to aging while in contrast, peroxidase activity was higher from 0.04 to 0.11 u/ mg protein after 96 h of aging. It was observed that all fatty acids of wild mustard seed oil were changed at higher aging durations. Behenic acid (C22:0) and Erusic acid (C22:1) were 0.656 and 38.543% in noaged seeds and they increased to 0.751 and 40.186%, respectively.
R. Farhoudi; F. Por Hassan
Abstract
In order to evaluate the allelopatic potential of Eucalyptus camaldulesis aquatic extract on antioxidant enzyme activities, cell membrane damage and α-amylase enzyme activity of S. halapense, thisexperiments was conducted in Islamic Azad University, Shoushtar branch at 2012. The experiment was ...
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In order to evaluate the allelopatic potential of Eucalyptus camaldulesis aquatic extract on antioxidant enzyme activities, cell membrane damage and α-amylase enzyme activity of S. halapense, thisexperiments was conducted in Islamic Azad University, Shoushtar branch at 2012. The experiment was laid out according to a Completely Randomized Design with five replications and six treatments were various concentration of E. camaldulesis aquatic extract (0, 10, 20, 30, 40, 50 and 60%). The results indicated E. camaldulesis aquatic extract application exhibited gradual rise inhibitory effect on seed germination, seedling fresh weight, antioxidants enzymes activities, and α-amylase enzyme activity. Contrary to the previous traits, elevated malondialdehyde concentration and seedling fatty acid in S. halapense seedlings were detected. The minimum α-amylase enzyme activity (3.1 and 3.5 nmol prot -1 min-2 ), seedling fresh weight (0.1 and 0.8 mg) and seed germination (54% and 42 %) showed in 40% and 50% Eucalyptus camaldulesis aquatic extract. The highest fatty acid (23.6% and 23.1%) was noted at 40% and 50% Eucalyptus camaldulesis aquatic extract. In conclusion, E. camaldulesis aquatic extract decreased seedling growth, α-amylase enzyme activity and cell membrane stability of S. halapense seedling.
P. Rezvani Moghaddam; S.M. Seyyedi
Volume 5, Issue 2 , January 2016, , Pages 119-131
Abstract
Oil content and fatty acid composition are the most important factors for assessing and describing oilseeds. On the other hand, seed germination and seedling establishment are affected by seed reserves. In order to investigate the germination characteristics of sesame (Sesamum indicum L.) seeds as related ...
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Oil content and fatty acid composition are the most important factors for assessing and describing oilseeds. On the other hand, seed germination and seedling establishment are affected by seed reserves. In order to investigate the germination characteristics of sesame (Sesamum indicum L.) seeds as related totheiroil content and fatty acids composition, series of laboratory and greenhouse pot experiments were conducted in Ferdowsi University of Mashhad. Experiments were arranged based on a completely randomized design with 15 treatments and four replications. The experimental treatments were consisted of 15 sesame cultivars: Darab 2, Darab 14, Dashtestan 2, Dashtestan 5, Esfaraen, IS, JL-13, Kalat, Kashmar, Mashhad, Oltan, Sistan, TS-3, Varamin 2822, and Yellow White. The results showed that the low mean germination time (MGT) and mean emergence time (MET) were detected in Dashtestan 2, Dashtestan 5 and IS cultivars. In contrast, the high MGT and MET were observed in Yellow White and Mashhad cultivars. Although, there were no statistically differences between sesame cultivars for seed nitrogen concentration and oil percentage, significant differences were observed in terms of seed phosphorus concentration. The highest and the lowest seed P concentration were obtained in Dashtestan 2 and Yellow White cultivars, respectively. There were no significant correlation between MET and fatty acids, except for oleic, linoleic and linolenic acids. A negative correlation between oleic acid and MET (R2= 0.73**) and also a positive correlation between linolenic acid and MET (R2= 0.73**) was observed. Therefore, it seems that sesame seed vigor highly depends on unsaturated fatty acids composition.
S.M. Seyyedi; P. Rezvani Moghaddam; M. Khajeh Hosseini; H. Shahandeh
Volume 5, Issue 1 , March 2015, , Pages 93-105
Abstract
In order to investigate the role of quality yield characteristics and fatty acids composition on seed quality of black seed (Nigella sativa L.) in a calcareous soil, a field experiment was conducted at the Faculty of Agriculture, Ferdowsi University of Mashhad, Iran, in 2013. A complete randomized block ...
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In order to investigate the role of quality yield characteristics and fatty acids composition on seed quality of black seed (Nigella sativa L.) in a calcareous soil, a field experiment was conducted at the Faculty of Agriculture, Ferdowsi University of Mashhad, Iran, in 2013. A complete randomized block design was used based on factorial arrangement. In the field experiment, the fertilizer resources (vermicimpost (V) (10 ton ha-1) + Tiobacilus (T), Sulfur (S) (20 ton ha-1) + T, V+S+T and control) and three levels of P (0, 30 and 60 kg.ha-1) were the first and second experimental factors, respectively. Based on proximate analysis of black seeds, V+S+T had a highest significant effect on increasing crude protein, essential (volatile) oil and fixed oil, as compared to control treatment. The applying V+T, S+T and V+S+T had significant decreasing effects on linolenic acid (by 53, 42 and 63%, respectively), as compared to control. The highest linoleic acid (cis) was observed significantly by applying V+S+T. There was the highest significant relationship between linolenic acid and seed vigor (R2=0.69**). Based on our results, vermicompost, especially in combination with sulfur application treatment, can be suitable approach to increasing the fixed oil quality of black seed
