The Effects of Drought Stress on the Antioxidant Resistance and Osmotic Adjusting Substances Content of Two Varieties Seedling of Camellia nitidissima
To explore the response of antioxidant resistance and osmotic adjusting substance content of Camellia nitidissima under drought stress,seedlings of two Camellia nitidissima types Longzhou and Xianmai were used as the material,and drought stress was applied through limiting water.The results indicated that:(1)With the drought stress lasting,the relative water content,chlorophyll content were decreased gradually,but the relatively electric conductivity,H2O2,MDA,total soluble sugar content,proline content were increased gradually;while the activities of SOD and CAT in the leaves showed a trend of increase in the first time and then decrease.(2)Under the same drought stress,the relative electric conductivity,H2O2,MDA content in the leaves of Xianmai were significantly higher than that of Longzhou,and the chlorophyll content and antioxidant enzyme activity of Longzhou were higher than that of Xianmai.The results showed that Longzhou had a higher antioxidant resistance,higher total soluble sugar content and proline content to increase water conservation,decrease the harm caused by drought stress on Camellia nitidissima,and the variety of Xianmai was relatively weak.