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Articles by M. El Hassni
Total Records ( 2 ) for M. El Hassni
  A. El Hadrami , M. Belaqziz , M. El Hassni , S. Hanifi , A. Abbad , R. Capasso , L. Gianfreda and I. El Hadrami
  The present study revealed that traditional and industrial OMW samples were mildly acidic (pH= 4.10-4.50) and of a high conductivity of 18 to 56 mS cm-1. The chemical oxygen demand (COD) ranged from about 250 to 600 g L-1 while the biological demand of oxygen (DBO5) was about 3.05 to 3.39 g L-1. The two OMW samples showed also significant differences in contents of many other chemical elements such as sodium, chloride, phosphorus and soluble and bound phenolic compounds. Fertirrigation of some crops from Mediterranean basin (maize, wheat, chickpea and tomato) by various concentrations of OMW showed significant different influences as respect to controls both with regard to the germination and growth stages of the plants. High reduction of shoot and root weight, of ramification and leaf extension rates, accompanied with significant reduction of yield, was observed for all the studied crops, especially wheat. The results were confirmed by significant qualitative and quantitative differences of some stress indicators such as phenolic compounds, peroxidases, chlorophyll contents observed between OMW treated plants and controls. A reduction of chlorophyll contents accompanied with a stimulation of peroxidases activity and phenolic compounds accumulation was recorded for OMW treated plants. The physiological disorders and/or phytotoxicity attributed to the OMW phenolics were highlighted depending on the crops.
  A. Arfaoui , B. Sifi , M. El Hassni , I. El Hadrami , A. Boudabbous and M. Cherif
  Germinated seeds of two chickpea cultivars ILC482 and INRAT87/1, respectively susceptible and moderately resistant to Fusarium oxysporum f. sp. ciceris (Foc), were preinoculated with a suspension of two Rhizobium isolates PchDMS and Pch43. Three days later, the seedlings were challenged by root dip with a conidial suspension of Foc race 0. The two Rhizobium isolates protected chickpea plants from F. oxysporum infection; the best protection has been obtained by PchDMS for the two cultivars. For the susceptible cultivar, mortality was 12.5 and 33.33% for treated plants, respectively with PchDMS and Pch43 as compared to the 79.16% in the inoculated control with Foc only. For the INRAT87/1 Cv. mortality was 8.33 and 12.5% for treated plants, respectively with PchDMS and Pch43 compared to the 54.16% in the control inoculated treatment. The two Rhizobium isolates stimulated the peroxidases and polyphenoloxidases activities and induced the accumulation of phenolic compounds. The maximum of peroxidases activities in plant roots were reached 24 h after challenging. However, the higher activity of polyphenoloxidases and the higher level of the phenolic compounds were recorded 72 h after Foc inoculation. Comparing the two strains, PchDMS was more effective in inducing enzymes and phenolic compounds and highest levels were recorded in INRAT87/1 cultivar.
 
 
 
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