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Articles by H.R.M. Galal
Total Records ( 2 ) for H.R.M. Galal
  A.M. Ismail , M.F. Abou Alhamd , H.R.M. Galal and F.A. Nasr-Eldeen
  Previous studies have shown that salicylic Acid (SA) plays an important role in the response of plants to salt and osmotic stresses. Therefore this experiment was conducted to investigate the impact of exogenous salicylic acid (0.5 mM) on some metabolic activities of Chlorella vulgaris and wheat cv. Sds-1 seedlings under 0, 50, 100, 150, 200, 400 and 600 NaCl mM. There are a highly significant decrease in chlorophyll a (at all salinity levels) in wheat seedlings and chlorophyll b (above 50 mM NaCl) in tested Chlorella and wheat plants. Soluble carbohydrates in Chlorella and wheat reached a maximum value (53.833 and 78.190 mg, respectively) when treated with 0.5 mM SA. Under treatment of SA, the highest concentration of soluble protein in salinized Chlorella and wheat was (76.658 and 194.360 mg, respectively) and total free amino acids value was (16.353 mg) in Chlorella. Na+ concentration in Chlorella and wheat increased (up to 390 and 200%, respectively) higher than control at the highest NaCl concentration. An opposite trend for K+, Ca++ and Mg++ contents was obtained. The lowest value of Ca++ (61.5% reduction of the control) in two tested plants was observed at the highest salinity levels. K+ content in treated plants with SA increased (at all salinity levels) than control. The plants with SA may produce the required factors for plant protection that may reduce the harmful effects of NaCl.
  H.R.M. Galal , W.M. Salem and F. Nasr El-Deen
  The present research has been conducted to explore the antifungal potency of the methanol and ethyl acetate crude extracts of seaweeds collected from the red sea, Hurghada, Egypt. The concentration of (50 mg mL-1) was tested against Alternaria alternata, Fusarium oxysporium, Alternaria brassicicola, Ulocladium botrytis and Botryotrichum Piluliferum. The antifungal activities were expressed as inhibition in dry mass (mg), protein content (μg mL-1) and enzymatic activity of pectinase and cellulase (units mL-1). For comparative study, the biological activity of standard antibiotic Nystatin was also measured. Crude ethyl acetate extract of Padina gymnospora and methanolic extract of codium fragile exhibited strong activity against most of the tested fungi. All the tested fungi were sensitive to Nestatin, except F. oxysporium (the most resistant fungi), where the dry weight recorded from 68 to 69%, protein recorded 69 to 52%, pectinase and cellulase activity 62 to 58% of control. The most sensitive fungi were U. botrytis where the dry weight, protein content, pectinase and cellulase activities all were completely inhibited in cellulose and pectin media. While, the most active algae is the ethyl acetate extract of P. gymnospora and methanolic extract of C. fragile. inhibited pectinase and cellulase enzymes activities for all the tested fungi except A. brassicicola and F. oxysporium. This report confirms the broad antifungal effect of C. fragile using the methanolic extracts rather than ethyl acetate (P. gymnospora). Additionally, These Egyptian seaweeds, therefore, considered as a potential source for treating infections caused by the tested plant fungi.
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