Resumen de Effects of abiotic stress on the germination
Chiraz Charrei Hoauari, Afef Hajjaji Nasraoui, Houda Gouia, Ali Haouari
Seeds germination of Pennisetum dichotomum was tested for three alternating temperatures (10, 25, 35 oC) at different hydric potentials (0,-1, -3, -7, -10 and -16 bar) applied with differ- ent concentrations of sodium chloride (0-3-6-12 or 15g/l of NaCl). The highest germination parameters (germination rate, germination percentage) were obtained with no osmotic potential (0 bar) under 25 oC. Germination rate decreased progressively with increasing NaCl dose, and the lower value of this parameter was reached with 15g/l of NaCl. Compared to control (0g/l of NaCl) P. dichotomum seeds, the radical length (RL) and the hypocotyl length (HL) of the NaCl-treated ones were severely decreased at 12 and 15g/l concentrations. In another way, seedling growth of P. dichotomum was shown more sensitive than germination seeds to salinity stre
