Abstract: The knowledge of the physiological characters implied in the processes of the adaptation plants to the abiotic constraints constitutes a decisive stage of fight against the drought. Six varieties of durum wheat (Triticum durum) were used in this study: four local varieties characterized by a low potentiel production (Djenah khetaifa, Beliouni, Rahouia and Guem goum rkham) and two introduced varieties with a high production potentiel (Vitron and Gta dur). Pot experiments was carried out in a greenhouse. The plants were subjected to different rates of water supply (100, 80, 60, 40 and 12% of field capacity). At the anthesis stage, some physiological parameters such as net photosynthesis, transpiration, water use efficiency, stomatal resistance and the rate of chlorophyll were recorded on the flag leaf. The results revealed highly significant varietal differences to the whole of parameters measured. The results showed that water stress, in all the varieties decreased the chlorophyll rate, while increased the stomatal resistance, which involves a fall in the photosynthetic activity and therefore a decrease in the production of the dry mass. Yet, under the same conditions of water stress, the introduced varieties have a good capacity of adaptation compared with the local varieties. Nonetheless, variety Beliouni is confirmed as the most productive in parallel with the other local varieties. In the conditions of this study, positive correlations were reported between the net photosynthesis and the production of the dry mass.
N° Revue: World Journal of Agricultural Sciences 2009 Vol.5 No.5 - Pagination: 609-616 - Date: 2009
URL: https://www.cabdirect.org/cabdirect/abstract/20103042609
Mots cles: Water, , flat, leaf photosynthetic, , water, deficit, durum, wheat, Triticum, Desf,
co_auteurs: Bousba, R.; Ykhlef, N.; Djekoun, A.
citations: https://scholar.google.fr/scholar?cites=5702223507950682442&as_sdt=2005&sciodt=0,5&hl=fr