The effects of light and temperature on photosynthate partitioning in Antarctic freshwater phytoplankton |
| |
Authors: | Hawes Ian |
| |
Institution: | British Antarctic Survey, Natural Environment Research Council High Cross, Madingley Road, Cambridge CB3 0ET, UK |
| |
Abstract: | The effects of temperature and radiation flux on the partitioningof photosynthetically fixed carbon into four intracellulai metabolicpools was investigated for natural phytoplankton assemblagesfrom an Antarctic freshwater lake. At ambient temperature, proteinsynthesis was saturated at low photon flux densities (3040µmol m2 s1) and above this flux fixed carbonwas increasingly stored as lipid and polysaccharide. Increasingtemperature raised both the saturated rate of protein synthesisand the photon flux at which saturation occurred. There wasa corresponding decline in the accumulation of reserve products,particularly at low radiation fluxes. The consequences of thispattern of uptake for the phytoplankton is discussed. |
| |
Keywords: | |
本文献已被 Oxford 等数据库收录! |
|