Akram Rostamipour; Reza Tavakkol Afshari; Hamidreza Khazaie; Danial Kahrizi; Hamid Reza Eisvand
Abstract
Camelina, an oilseed plant in the Brassicaceae family, is extensively utilized in the food and pharmaceutical industries. This study aimed to investigate the effects of micronutrient foliar application on the growth and yield traits of two camelina genotypes (Soheil cultivar and Line-69) during the periods ...
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Camelina, an oilseed plant in the Brassicaceae family, is extensively utilized in the food and pharmaceutical industries. This study aimed to investigate the effects of micronutrient foliar application on the growth and yield traits of two camelina genotypes (Soheil cultivar and Line-69) during the periods 1400-1401 and 1401-1402 at the Agriculture Research Station of Ferdowsi University of Mashhad,, Iran. The experiment was conducted as a factorial design based on a completely randomized block with three replication, considering line and cultivar. The applied treatments included foliar application of iron sulfate, zinc sulfate, manganese sulfate, a mixture of micronutrients (iron sulfate, zinc sulfate, manganese sulfate), distilled water, and a control. These treatments were applied at two stages: 50% flowering and 50% pod formation. The experiment was conducted as a factorial design based on a completely randomized block with three replication, considering line and cultivar. The results of mean comparison revealed that, over two cropping years, the highest 1000-grain weight (1.20 grams) was attained in the Soheil cultivar during the 50% flowering stage in the first crop year, following the application of manganese sulfate via foliar application. The highest number of pods per plant (214 pods) was also observed in the Soheil cultivar during the 50% flowering stage, achieved through foliar application of iron sulfate in the second crop year. Under the influence of cultivar, the highest seed yield per hectare was obtained in the Soheil cultivar (1930 kg/hectare).
Nasrin Teimoori; Mokhtar Ghobadi; Danial Kahrizi
Abstract
Drought is one of the most important stresses in reducing plant growth, especially in the seed germination stage. Oxidative stress is one of the consequences of drought in plants. To investigate the reduction of oxidative stress damage caused by drought stress by using silicon in the initial stages of ...
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Drought is one of the most important stresses in reducing plant growth, especially in the seed germination stage. Oxidative stress is one of the consequences of drought in plants. To investigate the reduction of oxidative stress damage caused by drought stress by using silicon in the initial stages of camellia seedling growth, a factorial experiment as completely randomized design was carried out in the seed laboratory of Razi University with three replications. The factors include two camelina genotypes, four levels of drought stress (0, -3, -6, -9 bar using PEG-6000) and five levels of silicon (0, 2, 4, 6 and 8 mM). According to the results, drought stress increased the activity of antioxidant enzymes including peroxidase, catalase and superoxide dismutase and the amount of malondialdehyde, but it decreased the growth characteristics of seedlings and the amount of soluble proteins. The consumption of silicon (especially by 6 and 8 mM concentrations) increased the activity of antioxidant enzymes and seedling growth characteristics. So, consumption of 8 mM silicon increased peroxidase activity by 23.2%, catalase activity by 13.4%, superoxide dismutase activity by 41%, malondialdehyde by 19.1% and protein content. Soluble was 10.8%. Therefore, the consumption of silicon 8mM by activating the antioxidant system moderated the effects of oxidative stress caused by drought stress and increased the growth characteristics of camellia seedlings.
Nasrin Teimoori; Mokhtar Ghobadi; Danial Kahrizi
Abstract
Camelina oilseed has a lot of ability to be placed in the cultivation pattern of Iran's drylands. The seed germination and seedling establishment in dryland agriculture are usually exposed to drought stress. The aim of this study is to investigate the application effect of silicon concentrations in improving ...
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Camelina oilseed has a lot of ability to be placed in the cultivation pattern of Iran's drylands. The seed germination and seedling establishment in dryland agriculture are usually exposed to drought stress. The aim of this study is to investigate the application effect of silicon concentrations in improving the seed germination characteristics and seedling growth of camelina under drought-stress conditions. The experiment was conducted as a factorial based on CRD with three replications at the seed laboratory of Razi University. The factors include camelina genotypes (Sohail and Line-84), drought stress (0, -3, -6, -9 bar using PEG-6000) and silicon (0, 2, 4, 6 and 8 mM using sodium silicate). According to the results, increasing the drought stress decreased the seed germination characteristics and the seedling growth. However, germination percentage, germination rate, seedling length, seedling dry weight, seedling vigor indices and allometric coefficient of plumule to radicle weight were increased by silicon. To increase the measured traits, silicon 6 and 8 mM were better than other concentrations. In general, silicon was effective in mitigating the effects of drought stress on the seedling growth of camelina by improving the seed germination characteristics and seedling growth. Therefore, it seems that the silicon is an effective factor in such studies and its usability in camelina seed technology and seed coating for dryland areas.
