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Articles by S.A. Haroun
Total Records ( 4 ) for S.A. Haroun
  S.A. Haroun and M.H. Hussein
  The effect of seed priming in culture filtrates of two blue-green algae namely Cylindrospermum muscicola and Anabaena oryzae (F1 and F2 respectively) on different growth criteria of Lupinus termis plants grown in siliceous soil collected from Gebel-El-Nargis was investigated. As compared to control plants, seed presoaking in the culture filetrate Cylindrospermum (F1) increased (P≤0.05) the photosynthetic activity, growth criteria, content of nitrogenous compounds and carbohydrates in the shoot of tested plant. On the other hand, these parameters seemed to be non-significantly affected when the seeds were presoaked in F2. In the majority of cases, seed pretreatment with F1 or F2 increased (P≤0.05) chl.a, chl.b, total chlorophylls and total pigments, whereas a reversed effect was manifested in carotenoid contents. The two culture filtrates; particularly F1 caused significant increase in auxin, gibberellic acid and cytokinin, whereas abscisic acid showed a reverse situation. Amylase, protease and aminotransferase activities were progressively increased in response to presoaking in the algal filtrates. Protein banding patterns generally showed disappearance of a 34 and 42 KDa protein and induction of 129 and from 3-8 KDa by F1 treatment, meanwhile certain protein (M wt: 18 KDa) were only induced following treatment with F2 but not occurring in either the control or F1 treatment. Application of both F1 or F2 increased the intensities of protein bands from 20-32 KDa.
  S.A. Haroun and A.H. Ibrahim
  A pot experiment was conducted to investigate the effect of presoaking of wheat grains in cheese whey at different concentrations (0, 25, 50 and 100 %) on growth vigor of wheat seedlings and some physiological criteria. Whey treatment at 50% level induced a marked increase in shoot length, shoot fresh and dry masses and total leaf area of wheat plants as compared with control plants. On the other hand, the other used whey concentrations had no significant effect on the abovementioned criteria. In comparing to control plants, whey concentrations appeared to improve Hill activity and photosynthetic pigments and this effect depends mainly on the applied whey concentration. On the other hand, only 50% level of whey increased total 14C photoassimilates and consequently soluble and insoluble carbohydrate fractions of wheat plants as compared with control plants. Furthermore, this treatment induced noticeable increase in total carbohydrates and total nitrogen content of wheat seedlings. Qualitative and quantitative analysis of protein profile indicated that whey at 25 and 50 % levels increased protein concentrations in wheat seedlings and the effect was more elicited with 47- 89 kDa polypeptides. Moreover, all whey treatments induced new protein bands with molecular weight 5 and 33 kDa. Grain priming with 50% whey significantly increased K, Ca and P concentrations of wheat seedlings. Magnesium concentration appeared to increase in wheat with increasing whey concentration as compared with control plants. Total leaf conductivity and transpiration rate of wheat seedlings were increased in response to grain priming in cheese whey at 25 and 50% level. Conversely, whey treatment at 100% level appeared to reduce transpiration rate and total leaf conductivity. Relative water content (RWC) was greatly increased in wheat seedlings with whey treatments.
  S.A. Haroun
  The diphenyl ether herbicide, oxyfluorfen effect was compared between foliar treatment and soil drench application on Glycine max plant. Spray of oxyfluorfen led to significant decrease in shoot length, number of leaves, total leaf area as well as fresh and dry weight of leaves and shoot after 45 days from sowing and a non significant decrease was manifested after 90 days from sowing. Soil drench with oxyfluorfen induced non-significant effect on the above mentioned parameters. Root length, number of nodules and root fresh and dry weight were non significantly affected by oxyfluorfen spraying and decreased significantly by soil drench. In the majority of cases, pigments content of soybean leaves as well as its photosynthetic activity decreased significantly by spraying oxyfluorfen; and non-significantly affected by soil drench. On the other hand, foliar application of oxyfluorfen decreased growth promoting substances (IAA, GA3 and cytokinin) with simultaneous increase in IAA oxidase and ABA content of soybean plant after 45 days from sowing, whereas at the same stage, soil drench with oxyfluorfen affects these growth regulators non significantly. After 90 days from sowing both the site of application of oxyfluorfen appeared with insignificant effect on growth regulators content of soybean plant.
  A.M. Kazamel , R.M.E. Gamel , S.A. Haroun , A.M. Bader and M.A. El-Metwally
  Background and Objective: Seed-dressing or coating substances play a role to control underground pests, having ability to kill seed and seedling diseases, promote seedling healthy growth, improve the crop quality and seed germination rate. Materials and Methods: This investigation was carried out in order to study protein banding pattern, antioxidant enzymes activity, leaves ultrastructure in maize and wheat coating with fungicides, hattrick (6%) and premis (25%), respectively during three vegetation stages. Results: The protein profile of maize and wheat showed the appearance of 6, 4, 23 and 21 monomorphic bands at the 2nd and 3rd stage, respectively. Catalase and peroxidase activities of treated plants were increased. In ultrastructure measurement treatment caused decrease or increase in the measured parameters, with appearance of starch grains in treated maize and disappearance in treated wheat. The soil properties and soil microflora showed marked differences in response to the used treatments. Conclusion: From results we can concluded that dressing maize and wheat grains with the prospective dose of hattrick and premis, respectively enhance growth and the response was more pronounced in maize plants.
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