Huttunen S, Lappalainen N M, Turunen J
Botany Division, Department of Biology, P.O. Box 3000, FIN-90 014 University of Oulu, Finland.
Environ Pollut. 2005 Jan;133(2):303-14. doi: 10.1016/j.envpol.2004.05.041.
The UV-B-absorbing compounds of herbarium specimens of 10 subarctic bryophyte species collected during the years 1926-1996 and available at the Botanical Museum, University of Oulu, were studied. We studied whether herbarium specimens reflect changes in the past radiation climate through their methanol-extractable compounds. The order of gametophytes based on the average amount of total compounds (sum of A280-320 nm) per mass from the lowest to the highest was Polytrichum commune, Pleurozium schreberi, Hylocomium splendens, Sphagnum angustifolium, Dicranum scoparium, Funaria hygrometrica, Sphagnum fuscum, Sphagnum warnstorfii, Sphagnum capillifolium and Polytrichastrum alpinum, and the amount of UV-B-absorbing compounds per specific surface area correlated with the summertime daily global radiation and latitude. P. alpinum, F. hygrometrica and three Sphagnum species seem to be good indicators for further studies. The amount of UV-B-absorbing compounds revealed no significant trends from the 1920s till the 1990s, with the exception of S. capillifolium, which showed a significant decreasing trend.
对1926年至1996年间采集的、保存在奥卢大学植物博物馆的10种亚北极苔藓植物标本中的紫外线B吸收化合物进行了研究。我们研究了标本是否通过其甲醇可提取物反映过去辐射气候的变化。根据每单位质量总化合物（280 - 320纳米吸光度总和）的平均含量，从低到高排列的配子体顺序为：金发藓、塔藓、美丽曲尾藓、狭叶泥炭藓、曲尾藓、湿地藓、暗绿泥炭藓、瓦尔斯特多夫泥炭藓、细叶泥炭藓和高山金发藓科植物，每单位比表面积的紫外线B吸收化合物含量与夏季日总辐射和纬度相关。高山金发藓科植物、湿地藓和三种泥炭藓属植物似乎是进一步研究的良好指示物种。除细叶泥炭藓呈现显著下降趋势外，从20世纪20年代到90年代，紫外线B吸收化合物含量没有显著趋势。
