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Effects of dumpsites air pollution on the ascorbic acid and chlorophyll contents of medicinal plants

机译：垃圾场空气污染对药用植物抗坏血酸和叶绿素含量的影响

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摘要

Deposition of air pollutants emitted from municipal solid waste on the leaves of plants growing within the vicinity of dumpsites has adverse effects on their morphological, physiological, and biochemical properties. In this study, the effects of air pollutants on the ascorbic acid and chlorophyll contents of Chromolaena odorata and Morinda lucida collected from Aba-Eku, Ajakanga, Awotan, and Lapite dumpsites, Ibadan, Nigeria, were investigated. Leaves of each plant species were separately collected and extracted with different reagents; thereafter, the ascorbic acid and chlorophyll contents of the aliquots were measured using UV/Visible spectrophotometry. Significant reductions of 13.90–61.00%; 13.85–60.43%; 13.88–60.75%; and 12.23–28.29%, respectively, occurred in the chlorophyll A, chlorophyll B, total chlorophyll, and ascorbic acid contents of the two plant species collected from the four dumpsites in comparison to the control site. The decreasing order of the percentage reduction in the ascorbic acid and chlorophyll contents of the two plant species collected at the four dumpsites is Ajakanga??Aba-Eku??Lapite??Awotan. Negative correlations revealed that reductions in chlorophyll and ascorbic acid contents of the two plant species could be attributed to deposition of air pollutants emitted from the municipal solid waste on the plants’ tissues.
机译：在垃圾场附近生长的植物叶片上沉积城市固体废物排放的空气污染物会对它们的形态，生理和生化特性产生不利影响。在这项研究中，研究了空气污染物对从Chromolaena odorata和Morinda lucida的抗坏血酸和叶绿素含量的影响，这些气味来自于尼日利亚伊巴丹的Aba-Eku，Ajakanga，Awotan和Lapite垃圾场。分别收集每种植物的叶片，并用不同的试剂提取。然后，使用UV /可见光分光光度法测量等分试样中的抗坏血酸和叶绿素含量。大幅减少了13.90–61.00％; 13.85–60.43％; 13.88–60.75％;与对照站点相比，从四个垃圾场收集的两种植物的叶绿素A，叶绿素B，总叶绿素和抗坏血酸含量分别为12.23％和28.29％。在四个垃圾场收集的两种植物的抗坏血酸和叶绿素含量的百分比降低的降序是Ajakanga→Aba-Eku→Lapite→Awotan。负相关关系表明，两种植物的叶绿素和抗坏血酸含量减少可能归因于城市固体废物排放的空气污染物在植物组织上的沉积。

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