Mogîldea Elena Daniela, Mitoi Monica Elena, Biță-Nicolae Claudia, Murariu Dumitru
Institute of Biology Bucharest, Romanian Academy, 296 Spl. Independentei, 060031 Bucharest, Romania.
Faculty of Biology, University of Bucharest, 91-95 Spl. Independentei, 050095 Bucharest, Romania.
Plants (Basel). 2024 Feb 27;13(5):657. doi: 10.3390/plants13050657.
Using resilient, self-sustaining plants in urban green spaces enhances environmental and cultural benefits and reduces management costs. We assessed two spontaneous plant species, Mill. and L., in four sites from the surrounding urban areas, ranging in altitude from 78 to 1040 m. Protection against UV-B radiation is crucial for plants at higher altitudes, guiding our focus on UV-visible absorption spectra, fluorometric emission spectra, secondary metabolite accumulation, and pigment dynamics in leaves. Our findings revealed a slight increase in UV-absorbing compounds with altitude and species-specific changes in visible spectra. The UV-emission of fluorochromes decreased, while red emission increased with altitude but only in chicory. Polyphenols and flavonoids showed a slight upward trend with altitude. Divergent trends were observed in condensed tannin accumulation, with decreasing and increasing with altitude. Additionally, chicory leaves from higher altitudes (792 and 1040 m) contained significantly lower triterpene concentrations. In , chlorophyll pigments and carotenoids varied with sites, contrasting with UV absorbance variations. For , pigment variation was similar to absorbance changes in the UV and VIS range, except at the highest altitude. These observations provide valuable insights into species-specific strategies for adapting to diverse environmental contexts.
在城市绿地中使用适应性强、自我维持的植物可增强环境和文化效益并降低管理成本。我们评估了两种自生植物物种，即Mill.和L.，它们来自周边城市地区的四个地点，海拔范围为78至1040米。对高海拔地区的植物来说，抵御紫外线B辐射至关重要，这引导我们关注叶片中的紫外可见吸收光谱、荧光发射光谱、次生代谢产物积累和色素动态。我们的研究结果显示，随着海拔升高，紫外线吸收化合物略有增加，且可见光谱存在物种特异性变化。荧光色素的紫外线发射减少，而红色发射随海拔升高而增加，但仅在菊苣中如此。多酚和黄酮类化合物随海拔升高呈轻微上升趋势。缩合单宁积累呈现出不同趋势，随海拔升高一种减少而另一种增加。此外，高海拔地区（792和1040米）的菊苣叶中三萜浓度显著较低。在[未提及具体植物名称处]，叶绿素色素和类胡萝卜素因地点而异，这与紫外线吸收变化形成对比。对于[未提及具体植物名称处]，除了在最高海拔处，色素变化与紫外线和可见光范围内的吸收变化相似。这些观察结果为物种适应不同环境背景的特定策略提供了宝贵见解。
