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引用次数: 0
摘要
全球都在关注大气中二氧化碳浓度的上升可能会影响药用植物的药用或营养特性。Portulacaria afra 是南非的一种药用植物,传统医学家用它来治疗各种皮肤病。本研究旨在确定二氧化碳浓度升高是否会影响 P. afra 叶子的药用特性。为此,研究人员比较了暴露在环境(420 ppm)和高浓度(600 ppm)二氧化碳环境中、在温室条件下生长的阿芙拉叶片的植物化学成分含量、抗氧化和抗菌活性。结果显示,与对照组相比,暴露于高浓度二氧化碳环境中的叶片样本中黄酮类化合物的含量显著增加。暴露于高浓度二氧化碳的样本中,P. afra 叶子的抗氧化活性(DPPH 活性)基本保持不变。对痤疮棒状杆菌的抗菌活性随着全球二氧化碳浓度的增加而增加。这些研究结果表明,P. afra 是一种生命力顽强的药用植物,尽管大气中的 CO2 浓度不断升高,但其叶片仍可继续缓解某些疾病。
The effect of elevated carbon dioxide on the medicinal properties of Portulacaria afra
There is a global concern that rising atmospheric CO2 concentrations may impact the medicinal or nutritional properties of medicinal plants. Portulacaria afra is a South African medicinal plant that is used by traditional healers to treat various skin conditions. The aim of this study was to determine whether elevated CO2 concentrations would affect the medicinal properties of the leaves of P. afra. This was achieved by comparing the phytochemical presence, antioxidant and antimicrobial activity of the leaves of P. afra which were exposed to ambient (420 ppm) and elevated (600 ppm) CO2 concentrations of plants grown in greenhouse conditions. The results revealed that leaf samples that were exposed to elevated CO2 concentrations exhibited a significant increase in flavonoid presence, compared to the control group. The antioxidant activity of the leaves of P. afra (DPPH activity) remained mostly unchanged in the samples that were exposed to elevated CO2 concentrations. The antimicrobial activity efficacy against Cutibacterium acnes increased with increasing global atmospheric CO2 concentration. These findings suggest that P. afra is a resilient medicinal plant and that its leaves may continue to provide relief against certain ailments, despite rising atmospheric CO2 concentrations.
期刊介绍:
The South African Journal of Science is a multidisciplinary journal published bimonthly by the Academy of Science of South Africa. Our mandate is to publish original research with an interdisciplinary or regional focus, which will interest readers from more than one discipline, and to provide a forum for discussion of news and developments in research and higher education. Authors are requested to write their papers and reports in a manner and style that is intelligible to specialists and non-specialists alike. Research contributions, which are peer reviewed, are of three kinds: Review Articles, Research Articles and Research Letters.