Effects of different treatments on improving seed germination and initial growth properties in Zygophyllum eurypterum Boiss. & Buhse and Zygophyllum eichwaldii C.A.M.

Various treatments have been suggested for improving seed germination in different plants including agronomic، rangeland، forest and desert species. Our research was conducted to examine different treatments influences on seed germination and initial growth properties (germination percentage، rate of germination، length of radicle and plumule) in two species of Zygophyllaceae; Z. eurepterum and Z. eichwaldii. Five treatments including sulfuric acid (98% for 10 minutes)، potassium nitrate (0. 2 % for 72 hours)، gibberlic acid (250 ppm for 24 hours)، hot water (90 ºC for 10 minutes) and scarification were used. Additionally، distilled water was used as control treatment for results comparison. Factorial experiment with a completely randomized design in four replications was done. Results showed that there were significant difference among treatments in view point of percentage and rate of germination associated with length of plumule at p≤ 0. 01 and length of radicle at p≤ 0. 05. The highest amount of germination was related to scarification and hot water treatments while the lowest one was related to sulfuric acid. Also it was revealed that Z. eichwaldii understudy properties were higher than those of Z. eurepterum.