摘要
以耐旱性不同的４个无性系茶树品种为材料，测定其强度干旱胁迫过程中叶片生理生化的变化。结果表明：耐旱性强的茶树，在强度干旱的胁迫下，能维持相对较高的叶片含水量及蒸腾速率和气孔导度。水分胁迫过程中有一临界强度，在这一范围内，耐旱性强的茶树，叶片过氧化物酶活性相对较低，超过这一范围，则维持相对较高的过氧化物酶活性，叶片脯氨酸含量在水分胁迫过程中迅速累积，但其变化与茶树耐旱性无明确关系，耐旱茶树具有相对较高的水分利用效率，因此，茶树对水分胁迫的生理反应，可作为耐旱茶树的选种指标。
The experiment was carried Out with 2- year-old outting of four tea cultivars with dif-ferent drought tolerance. The tea outting were subjected to various degrees of water stress and changes of content of moisture,proline and activity of peroxidase and photosynthesis in their leaves were determined.The major results are as follows: The sequence of leaf rnoisture contents,net photosynthetic rate and transpiration rate were Zhenong 113 >Fudingdabai > Yunqi>Zisun when they were water-stressed for 3,6,9 days.Proline accumulated in leaves of all the cultivars and there were no obvious correlation between its change and drought tolerance of tea cultivar.
基金
农业部资助
关键词
茶树
水分胁迫
过氧化物酶
脯氨酸
光合作用
tea plants
water stress
photosynthesis,peroxidase activity
proline
