Autotetraploidization in Ziziphus jujuba Mill. var. spinosa enhances salt tolerance conferred by active, diverse stress responses

Chinese jujube (Ziziphus jujuba Mill.), native to China, is an important deciduous fruit tree. This species is mainly propagated by grafting, with Z. jujuba var. spinosa widely used as the rootstock because of its resistance to adverse conditions such as saline environments. In a previous study, we found that autotetraploid jujube is phenotypically superior to the corresponding diploid, furthermore, the differences in salt tolerance between the...