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海洋科学  2011 

温度和光照对孔石莼光合作用的影响

, PP. 14-17

Keywords: 孔石莼(Ulva,pertusa),光合作用,状态转换,光保护

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Abstract:

采用叶绿素荧光分析技术对孔石莼(Ulvapertusa)在不同温度及光照强度影响下的光合作用活性进行研究。结果表明孔石莼在温度相对较低的10℃和20℃下光合活性较强,而在较高的30℃下,光合作用受到抑制,处于光抑制状态的藻体能够通过加强自身热耗散以及启动光系统间的状态转换来实现逆境下的光保护,孔石莼对光照依赖性较低,当光照强度超过100μmol/(m2·s)时即达到光饱和,孔石莼在高光强下同样表现出很强的光保护能力。孔石莼对环境具有很强的适应能力与其高效的光合作用调控、保护机制密切相关。

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