بررسی اثر شوری روی جوانه زنی بذور گیاهان ‭(.Medicago spp., Onobrychis spp., Trifolium spp)‬

This expriment was performed to determine salt tolerance in some genera available in Gene bank.Salinity is an important environmental stress which restrict agricultural yeild. The effect of salt (NaCl) was studied on seeds germination of 19 different species of three genera, namely Medicago ( M. turbinata (L.) ALL. ، M. scutellata Mill. ، M. minima ( L.) Bartalini، M. polymorpha L.، M. rugosa Desr. ، M. rigidula (L.) ALL. and M. Lupolina L.), Onobrychis ( O. sativa , O. gypsicola , O. crista-galli and O. major ) and Trifolium (T. pratense L.، T. resupinatum L.، T. repens L. ).seeds were collected from Gene bank (RIFR) and after determination of optimum temprature (20 degree centigrade) and relative humidity (60%) for germination, effect of salt on percentage and rate of germination, shoot height, Root length and shoot and root dry weight were measured. The factorial expriments on RCBD design was used to carry out the intraction of species and different salt levels (0, 50, 100.150,200,250 and 300 mM). Results showed that increment of salt concentration caused delay in germination rate and decreased germination of seeds specially in some species of Trifolium genus. The results of analysis of variance showed a significant differences among the genera for all salt levels. Finally the highest salt resistance observed in Onobrychis genus in compare with other genera.. Key words: Fabaceae, Salinity, seeds germination, dry and wet weight, Medicago, Onobrychis and Trifolium.

کلیدواژه ها:

شوری خاک ، اونوبریکیس ، تریفولیوم ، مدیکاگو ، نیامک دارهای علوفه ای ، جوانه زنی