Kh. Ahmadi; H. Omidi
Abstract
Drought stress affects the morphology, physiology, and biochemistry of plants and will have major effects on agricultural production. This study was conducted to evaluate the effect of drought on some physiological and grain yield properties of Balangu populations (Lallemantia royleana Benth.), in the ...
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Drought stress affects the morphology, physiology, and biochemistry of plants and will have major effects on agricultural production. This study was conducted to evaluate the effect of drought on some physiological and grain yield properties of Balangu populations (Lallemantia royleana Benth.), in the Research Station of Shahed University. This study was conducted in a split-plot design based on randomized complete block design (RCBD) with three replications during 2014-2015. The experimental factors consisted of three different levels of drought stress at the flowering stage as main factors (applying soil water potential of -0.5, -6.5 and -9.5 atm), and Balangu populations including one population from Kurdistan and four populations from Esfahan province (Esfahan3, Esfahan5, Esfahan6, Esfahann) were considered as subplots. The traits studied included grain yield, one thousand seed weight, photosynthetic pigments content, proline content, total phenol content, membrane stability index (MDA), and peroxidase activity. According to the results, drought stress had significant effects on all traits except chlorophyll b content and chlorophyll a/b ratio. Population and its interactions showed a significant effect with all traits except anthocyanin content. Drought caused to the reduced content of photosynthetic pigments, membrane stability index, thousand grain weight and grain yield. With increasing drought stress, the lipid peroxidation enzymatic activity and non-enzymatic antioxidants such as phenolic content, carotenoids content, anthocyanins content, and proline content of tissue increased to induce drought tolerance. The highest grain yield with the mean of (312.77 kg/ha) and the highest phenolic content with an average of (14.02 mg/g FW) were recorded for the Esfahan3 population under relatively severe stress.
J. Aslani; A. Hajizadeh Moghaddam; Z. Fallah Mohammadi; A.H. Ismaili; R. Mohammadi
Abstract
The flowers of Eriobotrya japonica Lindl. have antioxidant and protective effects. The aim of this study was to investigate the effects of neuroprotection with hydro-alcoholic extract of Eriobotrya japonica flowerson CDNF, malondialdehyde and superoxide dismutase levels in the rat ...
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The flowers of Eriobotrya japonica Lindl. have antioxidant and protective effects. The aim of this study was to investigate the effects of neuroprotection with hydro-alcoholic extract of Eriobotrya japonica flowerson CDNF, malondialdehyde and superoxide dismutase levels in the rat cerebral cortex in an experimental model of Parkinson's disease. In this study, animals were randomly divided into three groups of nine each (control, damaged and damaged treated with plant extract). At first, the second and third groups of rats received the solvent of extract (saline) and the extract (200 mg/kg body weight) intraperitoneally for twelve weeks and three days per week, respectively. For Parkinson's disease in rats, 6-OHDA was injected into the right ventricle of the brain after 12 weeks. After five days, rats were sacrificed and CDNF, SOD and MDA levels in their cortex were measured. Data were analyzed using ANOVA test. Our results showed that pre-treatment with the flower extract of Eriobotrya japonica, increased CDNF and SOD and decreased MDA levels of cerebral cortex. These effects may be caused by phenolic and flavonoid compounds of this plant with strong antioxidant properties. Therefore, it could be concluded that this plant extract has protective role against Parkinson's disease because of protecting neurons against oxidative damage of toxic 6-OHDA.
N. Kabiri; S. Asgary; P. Rahimi
Abstract
Hypercholesterolemia, cholesterol-enriched diet and oxidative stress may cause an increase in serum total cholesterol (TC) levels resulting in development of atherosclerosis. Antioxidants play an important role in inhibiting and scavenging free radicals. Amaranthus caudatus L. is a lipid-lowering and ...
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Hypercholesterolemia, cholesterol-enriched diet and oxidative stress may cause an increase in serum total cholesterol (TC) levels resulting in development of atherosclerosis. Antioxidants play an important role in inhibiting and scavenging free radicals. Amaranthus caudatus L. is a lipid-lowering and antioxidant agent. The objectives of this study were to determine the effect of Amaranthus caudatus L. in reduction of some risk factor for atherosclerosis associated with reduction of oxidative stress. rabbits were assigned to four groups: Group I, regular diet (control); Group II, 1% cholesterol diet for 75 days; Group III, 1% cholesterol diet (45 days) followed by regular diet(30 days); Group IV, 1% cholesterol diet (45 days) followed by regular diet and Amaranthus caudatus (30 days) (150 mg·kg body wt). Blood samples were collected from rabbits before (0 time) and after 45 days and 75 days of experimental diets for measurement of apolipoproteinB (apoB), malondialdehyde (MDA), apolipoproteinA (apoA) and OX-LDL. The results showed that application of Amaranthus caudatus for 30 days caused a significant decrease in apolipoproteinB (apoB), malondialdehyde (MDA) and OX-LDL. However apolipoproteinA (apoA) increased significantly. Whereas, no significant decrease of risk factors was observed in animals received only normal diet. Consequently, these effects of Amaranthus are associated with reductions in oxidative stress probably due to the antiatherogenic effects and it could be considered as an important diet in regression of atherosclerosis.
M. Bahrami; F. Shariatmadari; M.A. Karimi Torshizi
Abstract
The aim of this study was to determine the effect of dietary extract of thyme and peppermint and vitamin E on layer immunie system and performance in heat stress condition and content of peroxidation egg during storage. One hundred fourty-four Lohmann strain light hens (26 weeks) allocated to four treatments ...
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The aim of this study was to determine the effect of dietary extract of thyme and peppermint and vitamin E on layer immunie system and performance in heat stress condition and content of peroxidation egg during storage. One hundred fourty-four Lohmann strain light hens (26 weeks) allocated to four treatments with 3 replications and 6 birds in each replication. Experiment treatments applied included control, thyme, peppermint and vitamin E (200 PPM)) that were hold in two different house temperature (normal and cyclic temperature). Plant extract administrated via drinking water were 1% for normal and 0.6% for warm house. Malondialdehyde (MDA) was determined in fresh and stored eggs for 14 days at different holding temperature (4*c and 23-27*c). Prior to and 14 days after vaccination against Newcastle disease (Lasota) blood samples were collected to evaluate the birds immune responses. To determinate of effects of factors against sheep red blood cell (SRBC) at 42nd and 47th days of experiment antigen were injected. Vitamin E induced antibody against Newcastle vaccination in layers kept at normal temperature (P0.05). Produced antibody amount was increased against NV after vaccination (P>0.05). Antibody titration was not affected by house temperature. Experiment treatment depressed egg MDA (P<0.05). MDA level in fresh egg yolk and those hold at 4*c were reduced by vitamin E, mint and thyme to the extend that in vitamine E group was lowest of all
