Kreslavskiĭ V D, Ivanov A A, Kosobriukhov A A
Biofizika. 2004 Sep-Oct;49(5):840-4.
The effect of monochromatic preirradiation in the region of wavelengths 550-730 nm on the parameters of variable and delayed fluorescence in primary spinach leaves irradiated with UV-B was investigated. It was shown that irradiation of leaves with UV-B at lambda(M) = 300 nm reduced photoinduced changes in variable and delayed fluorescence as well as increased the half rise-time of maximum fluorescence. Preirradiation in the region of 620-660 nm (I = 2-4 W x m(-2)) reduced partly the damage to photosystem II induced by UV-B, whereas preirradiation at lambda(m) = 550, 600, 700, and 730 nm had no significant influence. Potential receptors of red light that take part in the protection of photosystem II against UV-B are discussed.
研究了波长在550 - 730 nm范围内的单色预辐照对经UV - B辐照的菠菜初生叶片中可变荧光和延迟荧光参数的影响。结果表明，在λ(M)= 300 nm下用UV - B辐照叶片会降低可变荧光和延迟荧光的光诱导变化，并增加最大荧光的半上升时间。在620 - 660 nm区域（I = 2 - 4 W×m(-2)）进行预辐照可部分减轻UV - B对光系统II的损伤，而在λ(m)= 550、600、700和730 nm下进行预辐照则没有显著影响。文中讨论了参与光系统II抵御UV - B保护作用的红光潜在受体。
