UV responses of Lolium perenne raised along a latitudinal gradient across Europe: a filtration study
UV responses of Lolium perenne raised along a latitudinal gradient across Europe: a filtration study
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欧洲黑麦草的紫外线响应沿纬度梯度升高：一项过滤研究
DOI：
10.1111/j.1399-3054.2012.01591.x
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发表时间：
2012
影响因子：
6.4
通讯作者：
Comont D
中科院分区：
文献类型：
--
作者：
Comont D
Lolium perenne（cv. AberDart）在沿着欧洲纬度梯度（37-68°N）的14个地点种植，以研究紫外线辐射（UV）和气候对地上生长和叶片UV-B吸收化合物的影响。在每个位置，植物在由开放、UV-B透明（二乙酸纤维素）和UV-B不透明（聚酯）环境组成的重复UV-B过滤实验中在室外生长5周。傅里叶变换红外光谱用于比较与处理和位置相关的植物代谢物谱。紫外线辐射和气候参数确定每个位置从网上来源和数据进行了评估，使用组合ofanova和多元回归分析。不同地点之间的生长差异大多归因于气候参数的组合，最低温度被确定为重要的生长限制因素。然而，没有一个单一的环境参数可以始终解释植物生长的变异性。叶片UV-B吸收化合物的浓度在整个纬度梯度上与太阳UV呈正趋势;然而，这种关系在所有处理中并不一致。这项研究最引人注目的实验结果是存在或不存在过滤框架对紫外吸收化合物的影响。总的来说，这项研究表明了欧洲方法在研究自然紫外线在大纬度梯度上的影响方面的价值。我们已经证明了在多个地点协调紫外线过滤的可行性，但也强调了开放控制和仔细解释植物反应的必要性。
Lolium perenne(cv. AberDart) was grown at 14 locations along a latitudinal gradient across Europe (37–68°N) to study the impact of ultraviolet radiation (UV) and climate on aboveground growth and foliar UV‐B absorbing compounds. At each location, plants were grown outdoors for 5 weeks in a replicated UV‐B filtration experiment consisting of open, UV‐B transparent (cellulose diacetate) and UV‐B opaque (polyester) environments. Fourier transform‐infrared spectroscopy was used to compare plant metabolite profiles in relation to treatment and location. UV radiation and climatic parameters were determined for each location from online sources and the data were assessed using a combination ofanovaand multiple regression analyses. Most of the variation in growth between the locations was attributable to the combination of climatic parameters, with minimum temperature identified as an important growth constraint. However, no single environmental parameter could consistently account for the variability in plant growth. Concentrations of foliar UV‐B absorbing compounds showed a positive trend with solar UV across the latitudinal gradient; however, this relationship was not consistent in all treatments. The most striking experimental outcome from this study was the effect of presence or absence of filtration frames on UV‐absorbing compounds. Overall, the study demonstrates the value of an European approach in studying the impacts of natural UV across a large latitudinal gradient. We have shown the feasibility of coordinated UV filtration at multiple sites but have also highlighted the need for open controls and careful interpretation of plant responses.