Pandey A, Jaiswal D, Agrawal M, Agrawal S B
Laboratory of Air Pollution and Global Climate Change, Department of Botany, Institute of Science, Banaras Hindu University, 221005 Varanasi, India.
Photosynthetica. 2022 Oct 3;61(2):157-167. doi: 10.32615/ps.2022.042. eCollection 2023.
The study was executed to assess individual and interactive effects of elevated ultraviolet-B (eUV-B) radiation and chromium (Cr) on a medicinal plant Nees. The experiment was conducted under field conditions involving control, Cr, eUV-B, and Cr+eUV-B treatments. The results showed that Cr content was the highest in roots as compared to other parts under Cr+eUV-B. Significant reductions in photosynthetic rate, intercellular CO concentration, and stomatal conductance were observed under all treatments with maximum under Cr+eUV-B. Chlorophyll (Chl) fluorescence parameters showed variable responses under Cr and Cr+eUV-B. Chl content showed reductions under all treatments whereas Chl / ratio and carotenoids showed increment under eUV-B and reductions under Cr and Cr+eUV-B. The ultrastructure of leaves showed changes in chloroplasts under treatments. Vasicine (medicinally important secondary metabolite) increased under treatments. Our study revealed that showed variable responses towards individual and interactive stress of Cr and eUV-B.
本研究旨在评估增强的紫外线-B（eUV-B）辐射和铬（Cr）对药用植物Nees的单独及交互作用。实验在田间条件下进行，设置了对照、Cr、eUV-B以及Cr+eUV-B处理。结果表明，在Cr+eUV-B处理下，根中的Cr含量相较于其他部位最高。在所有处理下均观察到光合速率、细胞间CO浓度和气孔导度显著降低，其中Cr+eUV-B处理下降低幅度最大。叶绿素（Chl）荧光参数在Cr和Cr+eUV-B处理下呈现出不同的响应。所有处理下Chl含量均降低，而Chl / 比值和类胡萝卜素在eUV-B处理下增加，在Cr和Cr+eUV-B处理下降低。处理下叶片的超微结构显示叶绿体发生了变化。瓦西辛（具有重要药用价值的次生代谢产物）在处理下增加。我们的研究表明，[植物名称]对Cr和eUV-B的单独及交互胁迫表现出不同的响应。
