Ponte Academic Journal Jul 2018, Volume 74, Issue 7 |
EFFECTS OF SALT STRESS ON SEED GERMINATION OF SOME NATIVE PLANTS OF ALGERIAN SAHARAN RANGELANDS Author(s): M. Marfoua ,S. Bissati Bouafia, A. Eddoud, E. Buisson, FZ Belhadj D. Ameur and A. Saridi J. Ponte - Jul 2018 - Volume 74 - Issue 7 doi: 10.21506/j.ponte.2018.7.7 Abstract: This study aims to compare the germination behavior of fourteen native dominant species from (11 botanical families) from dromedary's rangelands recommended for ecological restoration under different concentrations of NaCl (0, 50, 100, 150, 200 and 250 mM). Germination Percentage (GP %) and Mean Germination Time (MGT) was recorded. The obtained results showed that seeds of all the tested species germinate only in the lowest concentration of NaCl (0 and 50mM). On the other hand, when the saline concentration is between (100 and 250mM). An osmotic stress is manifested, decreasing and delaying the germination from the first three days at 0mM to the (9th, 12th and 15th day) at (150, 200 and 250 mM) respectively according to species. High concentrations of NaCl inhibit seed germination of most species. With the exception of Asphodelus tenuifolius Cavan. which showed the best germination behavior even in the highest concentrations (65 and 15%). It has a relatively higher tolerance than Bassia muricata (L.) Asch. (60%) and Crotalaria saharae Coss (40%).
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