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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.湖泊科学,2002,14(4):357-362. DOI:10.18307/2002.0410
CHEN Kaining,QIANG Sheng,LI Wenchao.Photosynthetic Rate in Potamogeton pectinatus L. and Factors of Influence. J. Lake Sci.2002,14(4):357-362. DOI:10.18307/2002.0410
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蓖齿眼子菜的光合速率及影响因素
陈开宁1,2, 强胜1, 李文朝2
1.南京农业大学, 南京, 210095;2.中国科学院南京地理与湖泊研究所, 南京, 210008
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
DOI:10.18307/2002.0410
分类号:
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.
Photosynthetic Rate in Potamogeton pectinatus L. and Factors of Influence
CHEN Kaining1,2, QIANG Sheng1, LI Wenchao2
1.sNunjing Agricultural University, Nanjing 210095, P. R. Chinas;2.Nanjing Institute of Geography and Limnology, Chinese Academy of Sicences, Nanjing 210008, P.R.China
Abstract:
Potamogeton pectinatus L., with extensive adaptability, is a perennial submerged aquatic macrophyte.It can survive in hyer-eutrophic waters.The results show that net photosynthetic rate at 10℃ was 0.88mg/(g·h) and its optimum temperature was at 25℃.Poor growth was found at 30℃.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.
Key words:  Photosynthetic rate  Chlorophyll  light compensation point  Potamogeton pectinatus L.  Dianchi Lake
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