College of Medical Technology, State Key Laboratory of Characteristic Chinese Medicine Resources in Southwest China, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China.
College of Medical Technology, State Key Laboratory of Characteristic Chinese Medicine Resources in Southwest China, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China.
Sci Total Environ. 2020 Jan 1;698:134141. doi: 10.1016/j.scitotenv.2019.134141. Epub 2019 Sep 4.
The rhizomes of Coptis chinensis Franch., Coptis deltoidea C. Y. Cheng et Hsiao and Coptis teeta Wall, are sources of renowned traditional Chinese medicines. Recently, human activities and climate change has caused degeneration of the natural habitats of these pharmacological plants. Analyzing the impact of climate change on the possible distribution of Coptis herbs is essential for their future conservation and domestication. The purpose of this study was to predict the potential distribution of these valuable plants and identify the potential effects of climate change on three Coptis species, using of species distribution modeling (SDM). In this study, we first predict the distribution size variations of the three plant species, under present and future conditions. Secondly, we carried out field sampling of these three species and analyzed the chemical composition by high performance liquid chromatography (HPLC). Results show that the predicted distributions of all three Coptis herbs were not limit to the reported regions, but also cover other potential areas. Among the environmental variables, annual precipitation range (Bio2) induced the largest impact on SDMs for C. chinensis (72.2%) and C. deltoidea (37.9%), while C. teeta was more significantly affected by isothermally (Bio3, 39.2%). When comparing the possible future distribution to the present distribution of these species, a decreasing tendency was observed in the highly suitable areas of C. chinensis and the generally suitable areas of C. teeta, indicating that the environmental changes would affect the distribution of these two species. In addition, the average alkaloid content was found to be the highest in highly suitable areas, while it was decreased in moderately and generally suitable areas, indicating that alkaloid content may be related to environmental factors. In summary, these findings improve our understanding of the ecological impact of climate on the distribution of three Coptis species.
黄连、三角叶黄连和云南黄连的根茎是著名的中药。最近，人类活动和气候变化导致这些药用植物的自然栖息地退化。分析气候变化对黄连属植物可能分布的影响，对其未来的保护和驯化至关重要。本研究旨在利用物种分布模型（SDM）预测这些有价值植物的潜在分布，并确定气候变化对三种黄连属植物的潜在影响。在本研究中，我们首先预测了三种植物在当前和未来条件下的分布范围变化。其次，我们对这三种植物进行了实地采样，并通过高效液相色谱法（HPLC）分析了其化学成分。结果表明，三种黄连属植物的预测分布不仅局限于已报道的地区，还涵盖了其他潜在地区。在环境变量中，年降水量范围（Bio2）对 C. chinensis（72.2%）和 C. deltoidea（37.9%）的 SDM 影响最大，而 C. teeta 则更多地受到等温线（Bio3，39.2%）的影响。将可能的未来分布与这些物种的当前分布进行比较时，发现 C. chinensis 的高适宜区和 C. teeta 的一般适宜区呈减少趋势，表明环境变化会影响这两个物种的分布。此外，发现高适宜区的平均生物碱含量最高，而在中适宜区和一般适宜区则有所下降，表明生物碱含量可能与环境因素有关。综上所述，这些发现提高了我们对气候对三种黄连属植物分布的生态影响的认识。
