Evaluation on the salt tolerance of 38 germplasm resources of Elytrigria repens at seed germination stage

Based on simulation salt stress with mixture of 1.2% of NaCl∶Na2SO4(1∶1), the routine paper bed culture was used to estimate the salt tolerance of 38 germplasm resources of Elytrigria repens at the seed germination stage by measuring the germination rate, germination energy, germ length, embryonic root length, vitality index, germination salt tolerance index and germination stress index. The results of this study showed that the salt stress decreased the germination rate, germination energy, germination Index and vitality index of E.repens, inhibited the growth of E.repens germ and radical, and also decreased the germination characteristic of E.repens. According to the comprehensive evaluation value, the salt tolerance sequence of 38 E.repens accessions from high to low was E03, E31, E16, E17, E42, E26, E04, E25, E12, E38, E15, E36, E13, E32, E09, E21, E07, E08, E01, E29, E10, E18, E24, E28, E30, E23, E11, E39, E02, E34, E19, E35, E06, E40, E33, E41, E37, E27.