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| 蓖齿眼子菜的光合速率及影响因素 | |
| 引用本文： | 陈开宁,强胜,李文朝.蓖齿眼子菜的光合速率及影响因素[J].湖泊科学,2002,14(4):357-362. |
| 作者姓名： | 陈开宁 强胜 李文朝 |
| 作者单位： | 1. 南京农业大学,南京,210095;中国科学院南京地理与湖泊研究所,南京,210008 2. 南京农业大学,南京,210095 3. 中国科学院南京地理与湖泊研究所,南京,210008 |
| 基金项目： | 科技部重大项目“滇池蓝藻水华污染控制技术研究”课题(K99-05-35-01-02)资助. |
| 摘 要： | 本文研究了蓖齿眼子菜(Potamogeon pectinatus L)在滇池的光合速率、体内叶绿素季节变化及光和水温对其光合速率影响,并根据实验,计算出了蓖齿眼子菜生长的光补偿点,研究结果表明,蓖齿眼子菜1～3月份的净光合产氧量最大,为1.82～1.83mg/(g·h),6月份最低,为0.63 mg/(g·h);植物体内Chl.a和Chl.b平均含量分别为0.25～1.15mg/(g·h)和0.28～0.85mg/(g·h),蓖齿眼子菜可以通过调节体内Chl.a/Chl.b值来适应不同季节生长;蓖齿眼子菜有较宽的水温适应范围,10℃时的净光合产氧量可达0.88mg/(g·h),最高值出现在水温25℃,为1.16mg/(g·h),而30℃以上的水温已表现出对其生长的不利影响;蓖齿跟子菜生长的光补偿点为358～1256Lx,并随温度上升而逐渐增加. |
| 关 键 词： | 光合速率 叶绿素 光补偿点 蓖齿眼子菜 滇池 叶绿素 水生植物 水温 沉水植物 |
| 收稿时间： | 2002/3/12 0:00:00 |
| 修稿时间： | 2002年3月12日 |
Photosynthetic Rate in Potamogeton pectinatus L. and Factors of Influence |
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| CHEN Kaining,QIANG Sheng and LI Wenchao.Photosynthetic Rate in Potamogeton pectinatus L. and Factors of Influence[J].Journal of Lake Science,2002,14(4):357-362. | |
| Authors: | CHEN Kaining QIANG Sheng and LI Wenchao |
| Institution: | CHEN Kaining Q1ANG Sheng LI Wenchao |
| Abstract: | Potamogeton pectinatus L. , with extensive adaptability, is a perennial submerged a-quatic macrophyte. It can survive in hyer-eutrophic waters. The results show that net photo-synthetic rate at 10C was 0. 88mg/(g h), and its optimum temperature was at 25 C. Poor growth was found at 30C. In Dianchi Lake, the maximal net photosynthetic rate fell in January to March and minimal value occurred in June. This species can regulate content of chlorophyll a and b to use light better. The light compensation point in P. pectinatus 358 to 1256Lx, depends on temperature. |
| Keywords: | Photosynthetic rate Chlorophyll light compensation point Potamogeton pectinatus L Dianchi Lake |
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