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Articles by A. Abbad
Total Records ( 3 ) for A. Abbad
  A. Abbad , A. El Hadrami and A. Benchaabane
  The effect of salinity on the germination of the seeds before and after exposure to different NaCl concentrations were studied using seven Atriplex halimus provenances. The study showed a highly significant effect of salinity, provenance and their interaction on the percentage of germination. Seed germination was reduced in all provenances with an increase in salinity. Maximum germination levels were observed in tests using distilled water. SBO provenance showed a lesser reduction in germination in response to salt stress than other provenances. IDE provenance (Saharan provenance) showed low germination at 0% NaCl concentration and failed to germinate in 2% NaCl. Germination in distilled water indicated significantly different provenance responses. For TAO, IMS and SAL provenances, inhibition of germination was reversible, since the total germination after recovery of seeds exposed to three concentration of NaCl (1, 1.5 and 2%) did not differ significantly (P<0.05) from the distilled water control, whereas the inhibition of germination for NAD, OUD and IDE provenances are not reversible.
  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. Abbad , A. El Hadrami , I. El Hadrami and A. Benchaabane
  The product of biomass and the accumulation of the inorganic ions of seven Moroccan provenances of Atriplex halimus, treated with different concentrations of NaCl (0, 1, 2, 3 and 3.5%) was carried out. The study has shown a highly significant effect of provenance, salinity and their interaction (provenance x salinity). The production of the most significant biomass was recorded at 1 and 2% NaCl concentrations. High NaCl concentrations (3 and 3.5%) induce a reduction of the biomass. Among all the studied provenances, those Sidi Bouzid and Marrakech have shown the highest values of the biomass. As for the inorganic ions, the increase of salinity have generate an accumulation of Na+ and Cl- with a reduction of K+. This accumulation of the inorganic ions under salt stress was variable between provenances. This variability appears in relation with the polymorphism, which characterize the species. On the seven studied Moroccan provenances, those of Sidi Bouzid and Marrakech have shown a particular eco-physiological behaviour with a significant biomass production under salt stress.
 
 
 
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