Abstract
Suaeda salsa is a main halophyte in saline soils of China with dimorphic seeds (brown and black seeds). Brown seeds show higher germination percentage than black seeds. The effect of salinity on gibberellins (GAs) and abscisic acid (ABA) during germination of S. salsa seeds was invested. ABA content in dry brown seeds was about 2.7 times of black seeds, and decreased quicker than black seeds after imbibition. NaCl stress slightly prevented decreasing of ABA content in germination seeds and fluridone alleviate seed germination under salinity stress. Bioactive GAs and their biosynthetic precursors were higher in brown seeds than black seeds in all treatmens. Deactivated GAs forms were higher in black seeds than brown seeds in all treatments. GA4 declined in response to salinity for both seeds in early stage of germination. GA4 is more active than GA1 in promote seed germination.
