摘要
为探讨增强的紫外线-B(280~315nm)辐射对光合作用原初光能传递的光物理过程的影响,对菠菜类囊体膜及光系统II的吸收光谱、稳态荧光发射谱进行了分析.结果显示在实验条件下(温室,紫外线-B施加于植物成熟期,紫外线-B剂量1.152kJ·m-2·d-1),增强紫外线-B辐射并没有抑制原初光能传递过程,植物通过一系列调节机制(增强吸收短波光色素的吸收强度,调节两个光系统间能量分配,变化光合系统中色素蛋白构象、位置)保证了原初光能传递的光物理过程,将能量传递到反应中心用于光合作用.
To clarify the effects of Ultraviolet-B (UV-B, 280-315 nm) treatment on the energy transfer process in photosynthesis, steady-state absorption and fluorescence techniques are performed on thylakoid membrane and photosystem II (PSII).The results show that under greenhouse, lower UV-B radiation levels do not inhibit light energy transfer process. Plant ensures energy reach to reaction center through a series of adjustment mechanism. These mechanisms include enhancement of absorb intensity of short-wavelength-absorption pigments, regulation of energy distribution between two photosystems and the changs of conformation and (or) location about pigment-protein system.
出处
《光子学报》
EI
CAS
CSCD
北大核心
2010年第9期1582-1587,共6页
Acta Photonica Sinica
基金
国家自然科学基金(30670366)
陕西省自然科学基金2009JQ3004)
西北大学研究生创新基金(07YJC14)资助
关键词
UV-B
类囊体膜
光系统Ⅱ
稳态荧光光谱
光能传递过程
UV-B
Thylakoid
Photosystem II
Steady state fluorescence spectrum
Light energy transfer process