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Articles by Mozafar Sharifi
Total Records ( 2 ) for Mozafar Sharifi
  Aria Dolatabadian , Seyed Ali Mohammad Modarres Sanavy and Mozafar Sharifi
  The effects of pretreatment with salicylic acid on wheat seed germination (Triticum aestivum L. cv. Roshan), lipid peroxidation, and superoxide dismutase, catalase, polyphenol oxidase, and peroxidase activity were studied under conditions of salt stress. Seeds treated with different concentrations of salicylic acid were used for measuring germination traits. Salt stress was induced by sodium chloride solution. Seeds were soaked in salicylic acid solution for 24 h, dried with sterile paper, transferred to sterile Petri dishes, and treated with 10 ml NaCl solution at different concentrations. After 1 week, the number of germinated seeds, root length, seedling length, and dry weight were recorded. Antioxidant enzyme activity and lipid peroxidation were also assayed. Salinity decreased seed germination. Thus, a high concentration of NaCl (200 mM) decreased germination by 17.6% compared with control treatment. Salicylic acid significantly increased germination in stressed and control seeds. Salicylic acid increased the level of cell division of seedlings and roots, which increased plant growth. Salt stress significantly increased the activity of the antioxidative enzymes catalase, superoxide dismutase, peroxidase, and polyphenol oxidase in wheat seedlings, and salicylic acid reduced the activity of antioxidant enzymes as stress signal molecules. Our results indicated that scavenging of reactive oxygen species was effective, especially by salicylic acid, and that membrane damage was limited. The aim of the present work was to study the character of changes in enzymatic systems induced by NaCl and salicylic acid in wheat seedlings under conditions of salt stress. In brief, salicylic acid treatment reduced the damaging action of salinity on embryo growth and accelerated a restoration of growth processes; thereupon it may be effective for the improvement of seed germination in arid and semi-arid regions.
  Hassan Zare-Maivan , Khajehzadeh , Mohammad Hassan , Faezeh Ghanati and Mozafar Sharifi
  Despite wide distribution of Artemisia species in Iran, few investigations are available on ecophysiological mechanism(s) of its adaptation to various altitudes and soil properties. This study reports on the mycorrhizal fungal populations in the rhizosphere and degree of Arbascular Mycorrhizal (AM) symbiosis with Artemisia aucheri in Parvar Protected Area (PPA), located in Eastern Alborz mountain ranges, Iran. Samples of soil and plants were collected randomly in three altitudes at/and about 36° latitude. Soils samples from top 30 cm of rhizosphere and A. aucheri roots were collected and analyzed. Mycorrhizal fungal spores were isolated, identified and statistically analyzed. Soil type was sandy-loam significantly becoming loamy with increase in altitude. Spores of Glomus species formed the dominant mycorrhizal populations in the rhizosphere. A. aucheri roots developed arbuscular-vesicular mycorrhizae. Content of Ca in the roots and shoots of A. aucheri significantly was lower while contents of N and P significantly improved with hike in altitude. There were strong to moderate correlations between degree of AM mycorrhizal development, spore density and soil nutrients. Mycorrhizal symbiosis affects A. aucheri nutritional uptake and growth. Adaptive distribution potentials of A. aucheri makes it a reliable candidate for “designated indicator species” in steppe ecosystems and provides a means for well-planned sustainable green management in disturbed areas and conserving of protected areas. All ecological and conservation programs for Artemisia communities in PPA, need to take into account the role of mycorrhizal symbionts and the need to conserve mycorhizal fungi in the soil as well.
 
 
 
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