| 摘要: |
| 采用水培实验,以PEG进行水分胁迫(一0.5MPa),测定了有磷和缺磷情况下玉米苗期叶片中叶绿素、类胡萝卜素及原叶绿素酸酷随不同胁迫周期的变化。结果表明,水分胁迫时磷能使叶绿素。和类胡萝卜素降解减慢.表现为Chla/b值增大及Chlt/Caro。值随胁迫周期延长而呈v.型曲线变化。干早缺磷能造成原叶绿素酸醋相对积累,是导致Chla下降的重要因素.水分胁迫下叶绿素a,b和Caro及Pchl含量均呈下降趋势,而文替变换水处理能减缓光合色素的分解。 |
| 关键词: 水分胁迫，光合色素，磷，玉米 |
| DOI： |
| 分类号:S513.01 |
| 基金项目:国家攀登计划9219－5专题资助项目 |
|
| Effect of Phosphorus on Photosynthetic Pigment of Maize under Water Stress |
|
QuDong Wang Baoli Shan Lun Wang Peihong
|
| Abstract: |
| The Changes of contents of chorophyll(Chl),carotinioid(Caro)and Prochlorophyllide(Pchl)under the phosphorus containing and phosphorus-free conditions during different water stress periods were determined. The results showed that thecontents of Chl a,Chl b,Caro and Pchl decresed,but with different rates.Thge value of Chl a/b was increased and the change of Chl/Caro appeared in a V-shape.Highly varied water treatment could decrease the decomposition of photosynthetic pigment.Phosphorus could efficiently reduce the decrease of Chl a and Caro.Water stress and P-free could cause the accumulation of Pchl content,which is the main cause that Chl a content decreases. |
| Key words: water stress,photosynthetic pigment,phosphorus,maize |
