Abstract:

Polyethylene glycol （PEG-6000）was used to study the effect on seed vigor and chilling resistance of radish seedlings. The results showed that 20%PEG significantly enhanced germination potentiality 、germination index 、 vigor index. Under Low temperature, 20% PEG treatment significantly increased the activity of superoxide dismutase (SOD), the activity of peroxidase (POD), improved proline content significantly ,reduced malondialdehyde(MDA) content and relative electrical conductivity in leaves of radish seedlings. 20% PEG improved chilling resistance of radish seedlings.