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Articles by Hanan Gahin
Total Records ( 2 ) for Hanan Gahin
  Yasser Hussein , Gehan Amin , Adel Azab and Hanan Gahin
  Sesame (Sesamum indicum L., family Pedaliaceae) is considered as one of the most important oil crops in Egypt due to its high seed oil content. This study was conducted to study the influence of exogenously applied phytohormones (Salicylic Acid (SA) and kinetin (Kin) on growth and physiological behavior in drought stressed sesame plants. The experiment was designed into 4 groups, control, drought stress, drought treated with SA (0.1, 0.5 and 1 mM) and drought treated with Kin (0.05, 0.1 and 0.5 mM). It was found that drought stress adversely affected all growth parameters of sesame including plant height, fresh weight, dry weight, number of leaves and leaf area. Drought stress caused significant decrease in endogenous phytohormones (SA and Kin), while on treatment of drought stressed sesame plants with SA and Kin increased level of endogenous SA and Kin. On the other hand, drought stress caused significant increase in total soluble protein, poly peptide bands, proline, moreover on treatments with SA and Kin improved all previous substances in drought stressed sesame plants. The SDS-PAGE detection of protein indicated some changes in amount and number of protein bands and also new protein bands appeared in both stressed and phytohormonal treated plants. Therefore, exogenous application of drought stressed sesame plants with salicylic acid or kinetin may induce resistance to drought stress by enhancement of growth and various physiological processes which are negatively affected by drought stress.
  Yasser Hussein , Gehan Amin and Hanan Gahin
  Sesame (Sesamum indicum L.) is an annual plant that belongs to the Pedaliaceae family. Sesame is considered to be the oldest oil seed plant and is widely cultivated as an oil-crop in tropical and subtropical climates. Drought stressed sesame plants were exogenously treated with phytohormones (Salicylic Acid (SA) and Kinetin (Kin)). The experiment was designed into 4 groups: control, drought stress, drought treated with SA (0.1, 0.5 and 1 mM) and drought treated with Kin (0.05, 0.1 and 0.5 mM). Drought stress caused significant decrease in total seed oil contents and activities of catalase and peroxidase enzymes while on treatment of drought stressed sesame plants with SA or Kin increased all previous antioxidant substances. On the other hand, drought stress caused significant increase in phenolic compounds and activity of L-amino acid oxidase, moreover on treatments with SA and Kin improved all previous antioxidant substances in drought stressed sesame plants. The different seed oil extracts of all groups exhibited significant antimicrobial activities against tested bacteria and fungi. In conclusion, exogenous application of drought stressed sesame plants with SA or Kin activate antioxidant systems to resist drought stress.
 
 
 
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