Effect of drought stress on three physiological indexes in alfalfa seedling

The seedling of alfalfa (Golden Empress) were treated for 0 to 6 hours with the improved airdrought method and the AsA content, MDA content and POD activity in aboveground and underground parts were tested. The results showed that under the condition of slight drought stress in a short time, the MDA content and AsA content increased along with the progress of drought stress. The POD activity also increased in underground parts, however, there was no significant change in aboveground parts. The underground parts were more sensitive to drought stress than aboveground parts. The improved airdrought method was proper to simulate the drought stress conditions.