10种极地微藻叶绿素荧光特征分析

海洋浮游植物是水体环境中重要的初级生产者,其光合能力与浮游植物生产力密切相关,而这些均能在叶绿素荧光动力学上得以体现.利用调制叶绿素荧光仪( Water-PAM)对实验室培养的10种极地微藻的叶绿素荧光参数(Fv/Fo,Fv/f,NPQ)和快速光曲线拟合参数(Pm、α和Ik)进行测量和分析.结果表明:除CCMP2084...

ANALYSES OF CHLOROPHYLL FLUORESCENCE CHARACTERISTICS ON TEN STRAINS OF POLAR MICROALGAE

Marine phytoplanktons are important primary producer in aquatic environment and the productivity of them is related to its photosynthetic capacity. Chlorophyll fluorescence parameters (Fv /Fo, Fv /Fm, ΦPSⅡand NPQ) as well as the rapid light curve containing photosynthetic efficiency (a), maximal electron transport rate (Pm) and minimum saturating irradiance (Ik) of ten kinds of polar microalgae strains were measured by Water-PAM respectively. Nine kinds of strains except for CCMP2084 were in healthy physiological status. Fv /Fo of eight strains, whose values were higher than 1.0, showed activity sequence of PSⅡ as CCMP1056＞CCMP1204＞CCMP165＞CCMP2095＞CCMP1309＞CCMP445＞CCMP213＞CCMP2087. Besides, three strains including Chaetoceros brevis CCMP165, Attheya sp.CCMP213 and Thalassiosira sp CCMP1056, exhibit stronger photoprotection with the NPQ value higher than 2.0. Compared by Ik value, the sequence of light tolerance was CCMP213＞CCMP1056＞CCMP165. The strains of Attheya sp CCMP213 and Thalassiosira sp.CCMP1056 showed better adaptation to high irradiance than Chaetoceros brevis CCMP165.