摘要
[目的]研究极地生物适应环境的生理机制。[方法]人工模拟南极UV-B辐射环境,对南极小球藻进行UV-B适应性锻炼,并以未经UV-B适应性锻炼的南极小球藻为对照,分别测定其叶绿素荧光、光合放氧速率和抗氧化酶活性。[结果]随着UV-B辐射时间的延长,南极小球藻光合放氧速率和叶绿素荧光迅速下降,且锻炼南极小球藻的下降速率小于未锻炼南极小球藻。经UV-B胁迫后,南极小球藻的SOD、POD、CAT活性均随辐射时间的延长先上升后降低,锻炼南极小球藻的上升速率大于未锻炼南极小球藻,而下降速率显著小于未锻炼南极小球藻。[结论]经过UV-B适应性锻炼的南极小球藻可通过调整一系列生理活性指标对UV-B增强产生积极响应,以增强其自身对强辐射环境的适应性。
[Objective] The purpose was to research the physiological mechanism for adapting environment of organism in polar region.[Method] The UV-B radiation environment of the South Pole was simulated manually for UV-B adaptive training of Chlorella vulgaris.With C.vulgaris not treated with UV-B adaptive training as CK,their chlorophyll fluorescence,photosynthetic oxygen-release rate and antioxidase activity were determined resp.[Result] As UV-B radiation time was prolonged,the photosynthetic oxygen-release rate an...
出处
《安徽农业科学》
CAS
北大核心
2010年第36期20513-20515,共3页
Journal of Anhui Agricultural Sciences
基金
江西省自然科学基金项目(2010GZN0117)
