Gröniger A, Häder D-P
Institut für Botanik und Pharmazeutische Biologie, Friedrich-Alexander Universität Erlangen-Nürnberg, Staudtstr. 5, D-91058 Erlangen, Germany.
J Photochem Photobiol B. 2002 Feb;66(1):54-9. doi: 10.1016/s1011-1344(01)00275-5.
The chlorophyte Prasiola stipitata produces a UV-absorbing substance with an absorption maximum at 324 nm. The wavelength-dependent induction of the synthesis of this substance was investigated using simulated solar radiation in combination with 15 cut-off and one broad-band filter. The algae were exposed from three different distances (89, 100 and 119 cm) to the solar simulator producing a maximum of 203.58, 1.24 and 46.86 W/m(2) and a minimum of 107.94, 0.64 and 24.44 W/m(2) irradiances for PAR, UV-B and UV-A, respectively. A polychromatic action spectrum was calculated from the pooled results showing a clear maximum at 300 nm in the long-wavelength UV-B range, but there is still some induction caused by UV-A and PAR. The ratio of the effectiveness from PAR to UV-A to UV-B amounts to 1:2:22.
绿藻柄海链藻产生一种紫外线吸收物质，其最大吸收波长为324纳米。利用模拟太阳辐射结合15个截止滤光片和1个宽带滤光片，研究了该物质合成的波长依赖性诱导。将藻类从三个不同距离（89、100和119厘米）暴露于太阳模拟器下，该模拟器产生的光合有效辐射（PAR）、紫外线B（UV-B）和紫外线A（UV-A）的最大辐照度分别为203.58、1.24和46.86瓦/平方米，最小辐照度分别为107.94、0.64和24.44瓦/平方米。根据汇总结果计算出的多色作用光谱显示，在长波长UV-B范围内，300纳米处有一个明显的最大值，但UV-A和PAR仍会引起一些诱导作用。PAR、UV-A和UV-B的有效性之比为1:2:22。
