Research on responses of wild soybean to alkaline stress

345 lines of wild soybeans (Glycine soja) were collected from alkaline land in Baicheng of Jilin province. Different alkaline degrees soil was used for stress treatment from seeding. The germination rate and plant height were decreased with the increasing of alkaline concentration. Seed germination and growth were inhibited by 50% at pH 9.0. The 3 weeks seedlings were treated with 0, 50, 75, 150, 300, 500 mmol/L NaHCO3, which indicated that the seedlings grew normally under 0 or 50 mmol/L stress and the others wilted after 19, 6.5, 3, and 0.5 h respectively. 9 lines were selected with high germination rate and seed setting rate in alkaline soil (pH 9.0). Their contents of Chlorophyll, relative electrical conductivity and malondialdehyde were measured. G07048，G07092 and G07256 had no significant difference in the above index after stress treatment and were alkaline tolerant.