关键词: 茶树, 超敏蛋白, 低温胁迫, 生理生化指标

Abstract: Harpin，a new kind of elicitor protein，can increase the tolerance of plant. To understand the effects of harpin on the tea plant[Camellia sinensis（L.）O. Kuntze]under cold stress，The cultivar ‘Yingshuang’，was used as the material and treated with harpin at room temperature and 4 ℃，and then the physiological and biochemical indicators were determined. The results showed that osmotica content and antioxidant enzyme activity increased slightly within 6 days in the samples， which have been treated with harpin at room temperature. The contents of soluble protein，soluble sugar，proline and malondialdehyde（MDA），as well as the activities of superoxide dismutase（SOD），catalase（CAT）and peroxidase（POD），increased as extending the cold treatment time. However，the chlorophyll content decreased. Prudent use of harpin（24 μg ? L^-1）increased the contents of chlorophyll，soluble protein，soluble sugar and proline，simultaneously increased the activities of SOD，CAT and POD within 6 days. These results imply the injury of tea plants under cold stress can decline by the use of harpin，thus enhancing the cold resistant ability of tea plant.

Key words: tea plant, harpin, cold stress, physiology and biochemistry index