Photosynthesis response by phytoplankton to sunlight variability1
Photosynthesis response by phytoplankton to sunlight variability1
复制标题
浮游植物对阳光变化的光合作用反应1
DOI：
10.4319/lo.1982.27.6.1141
复制
发表时间：
1982
影响因子：
4.5
通讯作者：
K. Heinemann
中科院分区：
文献类型：
--
作者：
J. Marra;K. Heinemann
光合放氧和太阳辐照度已被测量的浮游植物文化保持在朝南的窗口温室。考虑日出-日落时期;测量和分析技术允许检查=0.23 cy * h-l的频率范围，在一种情况下，高达10 cy * h-'。在阳光明媚的日子里，光合作用上午最大，下午最小。在多云和多变的日子里，光合作用密切跟踪辐照度。交叉光谱分析的数据从变量天表明，光合作用响应于辐照度的变化（在l10 cy*h-'），而不是整合过去的辐照度值。对这种行为的生理学解释与非循环光合电子传递中电子载体的氧化还原特性有关。光合作用的时间依赖性行为的生态学意义在于，它补偿了浮游植物所经历的异质性和不确定性的光环境。
Photosynthetic oxygen evolution and solar irradiance have been measured for phytoplankton cultures kept in a south-facing window greenhouse. Sunrise-sunset periods are considered; measurement and analytical techniques allow examination of a frequency range of =0.23 cy * h-l, and, in one instance, up to 10 cy * h-‘. On sunny days there are morning maxima and afternoon depressions in photosynthesis. Photosynthesis closely tracks irradiance on cloudy and variable days. Cross-spectral analysis of data from variable days shows that photosynthesis responds to changes in irradiance (at l10 cy*h-‘) rather than integrating past irradiance values. A physiological explanation suggestcd for this behavior concerns the redox characteristics of electron carriers involved in noncyclic photosynthetic electron transport. The ecological significance of the time-dependent behavior of photosynthesis is that it compensates for the heterogeneous and uncertain light environment experienced by phytoplankton.