Effects of Salt Stress on Germination of Lettuce Seed and Growth of Seedling

The effects of different NaCl concentration on germination of lettuce seed and growth of seedling were investigated.The results showed that germination rate,germination vigor and germination index of Huayinaiyou lettuce seeds was a little higher compared with control under the stress of 50 mmol/L NaCl.With the increase of NaCl stress,germination rate,germination vigor,germination index and vigor index decreased to some degree.The length and fresh weight of root and plumula were also inhibited obviously by NaCl stress.Moreover the growth of root was stronger inhibited by NaCl stress than that of the plumule.It indicated that the root was more sensitive to NaCl stress.