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    • List of Articles Fariba Khosravinejad

      • Open Access Article

        1 - Study of Biochemical Parameters and Antioxidant Enzymes Activities on Oryza sativa under Salt Stress
        Ali Asghar Bagheri Fariba Khosravinejad
        Abiotic stress including Salt stress is the major limiting factors of growth and crop production in arid and semiaridregions. Many of the Salinity affects are seen at the cellular levels. In order to understand the response of Oryza sativa to salt stress, some of antiox More
        Abiotic stress including Salt stress is the major limiting factors of growth and crop production in arid and semiaridregions. Many of the Salinity affects are seen at the cellular levels. In order to understand the response of Oryza sativa to salt stress, some of antioxidant enzyme activities, Lipid peroxidation and Proline content were analyzed. Oryza sativa plant was treated by NaCl 0(control), 100, 200 and 300 mM for 14 days. For this purpose, a factorial design based on completely randomized design with three replications was used. The results showed that Growth parameters for example fresh and dry weight and height of shoot decreased under increasing NaCl. With increasing the concentration of NaCl, The activity of Catalase(CAT) and Ascorbat peroxidase(APX) were increased, but Superoxide dismutase (SOD) activity increased with increasing NaCl to 200 mM and then decreased at 300mM. Proline (Pro) and Malondialdehyde(MDA) contents respectively increased 2 and 3.6-fold at 300mM NaCl relative to the 0mM NaCl. Our results showed that by increasing the activity of CAT, SOD and APX associated with increased Proline had a positive effect on salt tolerance of Oryza sativa. Manuscript profile
      • Open Access Article

        2 - Effect of endophytic fungus, Piriformospora indica, on growth parameters and activity of antioxidant enzymes of rice (Oryza sativa L.) under salinity stress
        Ali Asghar Bagheri Fariba Khosravinejad
        Abiotic stress including salinity is the major limiting factors of growth and crop production in arid and semiaridregions. The endophytic fungus,Piriformospora indica has a pronounced growth-promoting activity and also increasesplant resistance to environmental stresses More
        Abiotic stress including salinity is the major limiting factors of growth and crop production in arid and semiaridregions. The endophytic fungus,Piriformospora indica has a pronounced growth-promoting activity and also increasesplant resistance to environmental stresses including salinity, drought and plantpathogens. In order to study, experiment was conducted in completely randomized block design with three replicationsand with two levels of p.indica–inoculated and non-p.indica-inoculated rice(control) and four levels of NaCl (0, 100, 200 and 300 mM). This research deals with the potential of P. indica to improve growth parameters of rice (Oryza sativa L.) and increase its resistance to salt stress with base on increasing of antioxidant enzyme activities. Our study demonstrated P.indica significantly increased growth parameters for example shoot and root biomass, Relative Water Content(RWC), proline content and activities of antioxidant enzymes such as glutathione reductase (GR), ascorbate peroxidase (APX), catalase (CAT), superoxide dismutase (SOD) and in contrast, decreased malondialdehyde (MDA) content (produced from peroxidation of membrane lipids) in p.indica–inoculated than non-p.indica-inoculated rice under all of salt stress conditions.So our results showed that P. indica-induced protection of O.sativa against salt stress could be mediated by antioxidant enzymes. Manuscript profile
      • Open Access Article

        3 - The effect of methanol extract of Lippia citrodoria in the prevention and control of IBD induced by acetic acid in mice
        maryam teimouri Fariba Khosravinejad
        Inflammatory bowel disease (IBD) is a chronic condition of the intestine with unknown etiology involving multiple immune, genetic and environmental factors. We were interested to examine the effect of extract from Lippia citrodoria, a medicine plant in prevention and co More
        Inflammatory bowel disease (IBD) is a chronic condition of the intestine with unknown etiology involving multiple immune, genetic and environmental factors. We were interested to examine the effect of extract from Lippia citrodoria, a medicine plant in prevention and control of experimental mouse IBD. L.citrodoria was administered (50, 150.200 mg/kg) through drinking water to IBD mice (induced by intrarectal administration of acid-induced). Prednisolone was used as the standard drug for comparison. Biochemical, macroscopic and microscopic examination of colon were performed. Biochemical evaluation of inflamed colon was done using assay of myeloperoxidase (MPO) activity and thiobarbituric acid reaction substances(TBARS) concentration as indicators of free radical activity and cells lipid peroxidation. Results indicated that the activity of MPO and lipid peroxidation products (TBARS) increased in acetic acid-treated group while recovered by pretreatment of animals with L.citrodoria (50,150,200 mg/kg) and prednisolone. L.citrodoria (50-100mg/kg) and prednisolone. L.citrodoria (50-200 mg/kg) and prednisolone-treated groups showed significantly lower score values of macroscopic and microscopic characters when compared to the acetic acid – treated group. The benefical effect of L.citrodoria ( 200mg/kg) was comparable to that of prednisolone.It is concludes that the antioxidant, antimicrobial, and anti-inflammatory potentials of L.citrodoria might be the mechanisms by which this extract protects animals against experimentally induced IBD. Proper clinical investigation should be carried out to confirm the activity in human Manuscript profile