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Articles by C. Djenadi
Total Records ( 2 ) for C. Djenadi
  H. Bachiri , R. Djebbar and C. Djenadi
  This study assessed the physiological changes in wheat plants exposed to gamma radiation and then subjected to water stress for 10 days. Seeds of wheat cultivar Hidhab and M4 mutant populations obtained previously by gamma rays treatment of cultivar Hidhab with 150 and 200 Gy were carried out in the green house at University of Bab-Ezzour (North Algeria) in 2012-2013. In water stress conditions, the 150 Gy dose caused a significant increase of total chlorophyll (30.13%) and proline content (31.48%) compared to non irradiated plants. Also the data show both treatments had a significant effect on Relative Water Content (RWC), where the high values of water content (48.57 and 54.10%) were recorded at 150 and 200 Gy, respectively under water stress. Overall, most of the physiological traits showed an improvement under gamma effect, now it is clear that the physical agents such as gamma rays can be used to enhance wheat cultivars in harsh conditions.
  H. Bachiri , R. Djebbar , A. Mekliche , C. Djenadi and A.M.A. Ghanim
  Background and Objective: Wheat crop always considered as strategic crop in Algeria and most Algerian land used for wheat production is subjected to water stress. Improvement of drought tolerance in wheat is among objectives for breeder in this region. This experiment was aimed to use carbon isotope discrimination (CID or Δ) as physiological marker to compare the response of ten wheat genotypes (Triticum aestivum L.) under different water regimes and to evaluate the relationship between Δ and other traits. Materials and Methods: Ten bread wheat genotypes were grown in pots in the absence of stress until 3 weeks of germination, 3 treatments of water regimes were imposed progressively. Treatments resulted from the combination of three irrigation levels (well-watered at 100%, medium-watered at 50% and low-watered at 25% of container capacity). Water stress was imposed after three weeks of germination, the experiment was continued up to 8th week of germination. The data were recorded in terms of dry matter (DM), relative water content (RWC) and carbon isotope ratio (δ) analyzed from shoot dry matter. Results: Carbon isotope discrimination varied significantly (p<0.01) among genotypes under well-watered and water-stressed conditions (medium-watered and low-watered treatments). Water regimes produced a linear and significant (r = 0.99, p<0.001) decrease in Δ with DM of all genotypes, the correlation between Δ and dry matter (DM) was positive (r = 0.71, p<0.05) in case of medium-watered treatment, while Δ wasn’t correlated with DM for well-watered and low-watered treatments. The genotypes V9, Hidhab and V6 exhibited the best performance under water stress (medium-watered treatment), with minimum decrease in DM and high carbon isotope discrimination (CID) values were observed in these genotypes as well as close relationship between DM and Δ. Conclusion: Data indicated that measurement of carbon isotope discrimination maybe useful tool for selection of drought tolerant wheat genotypes to enhance wheat productivity in drought prone areas.
 
 
 
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