Sævdal Dybsland Cecilie, Bekkby Trine, Hasle Enerstvedt Kjersti, Kvalheim Olav M, Rinde Eli, Jordheim Monica
Department of Chemistry, University of Bergen, Allégt. 41, N-5007 Bergen, Norway.
Section for Marine Biology, Norwegian Institute for Water Research (NIVA), Gaustadalléen 21, N-0349 Oslo, Norway.
Plants (Basel). 2021 Feb 9;10(2):334. doi: 10.3390/plants10020334.
Chemical ecology has been suggested as a less time-consuming and more cost-efficient monitoring tool of seagrass ecosystems than traditional methods. Phenolic chemistry in samples was analyzed against latitude, sea depth, sample position within a seagrass meadow (periphery or center) and wave exposure. Multivariate data analysis showed that rosmarinic acid correlated moderately positively with depth, while the flavonoids had an overall strong negative correlation with increasing depth-possibly reflecting lack of stress-induced conditions with increasing depth, rather than a different response to light conditions. At a molecular level, the flavonoids were separated into two groups; one group is well described by the variables of depth and wave exposure, and the other group that was not well described by these variables-the latter may reflect biosynthetic dependencies or other unrevealed factors. A higher flavonoid/rosmarinic acid ratio was seen in the periphery of a seagrass meadow, while the contrary ratio was seen in the center. This may reflect higher plant stress in the periphery of a meadow, and the flavonoid/rosmarinic acid ratio may provide a possible molecular index of seagrass ecosystem health. Further studies are needed before the full potential of using variation in phenolic chemistry as a seagrass ecosystem monitoring tool is established.
有人提出，化学生态学是一种比传统方法更省时、成本效益更高的海草生态系统监测工具。针对纬度、海深、海草草甸内的样本位置（边缘或中心）以及海浪暴露情况，对样本中的酚类化学物质进行了分析。多变量数据分析表明，迷迭香酸与深度呈适度正相关，而黄酮类化合物与深度增加总体呈强烈负相关——这可能反映出随着深度增加，缺乏应激诱导条件，而不是对光照条件的不同反应。在分子水平上，黄酮类化合物被分为两组；一组可以通过深度和海浪暴露变量很好地描述，而另一组则不能通过这些变量很好地描述——后者可能反映了生物合成依赖性或其他未揭示的因素。在海草草甸的边缘观察到较高的黄酮类化合物/迷迭香酸比率，而在中心观察到相反的比率。这可能反映了草甸边缘较高的植物应激，黄酮类化合物/迷迭香酸比率可能为海草生态系统健康提供一个可能的分子指标。在将酚类化学物质的变化作为海草生态系统监测工具的全部潜力得以确立之前，还需要进一步研究。
