Study on Physiological Characteristics of Drought Resistance of Koelreuteria bipinnata Franch

Two-year-old Koelreuteria bipinnata Franch.was treated with continues drought stress,and the variation feature of the soil water content,leaf water content,chlorophyll content,relative conductivity,malondialdehyde(MDA)content,the content of proline and soluble sugar content were analyzed.The results showed that under the drought stress,soil water content and leaf water content decreased with the stress time increasing.The chlorophyll content,relative conductivity,MDA content,proline content increased with the stress time increasing,but the chlorophyll content and proline content in the water control decreased after thirty-fifth day.The content of soluble sugar in water control variation was not obvious.