汞对小浮萍光合作用性能的影响：叶绿素荧光分析。

Plant Bioenergetics and Biotechnology Laboratory, Department of Botany, Mohanlal Sukhadia University, Udaipur, Rajasthan, 313001, India.

Sci Rep. 2023 Jul 27;13(1):12181. doi: 10.1038/s41598-023-39297-x.

The purpose of this study was to evaluate the effectiveness of chlorophyll fluorescence analysis in detecting the effects of mercury (Hg) treatment in duckweed species Lemna minor. The results showed that Hg treatment (ranging from 0.0 to 0.4 µM) significantly impacted the plant's photosynthetic ability, with a decrease in variable chlorophyll fluorescence, energy fluxes, density of reaction centers, and performance index. Complete inhibition of electron transport was observed in plants treated with high Hg concentrations, and the quantum yield of primary photochemistry and the ratio of dissipated energy to absorption both decreased with increasing Hg concentrations. Performance Index (PI) was significantly affected by the Hg concentrations, reaching zero in plants treated with the highest Hg concentration. Overall, JIP analysis was found to be an effective tool for detecting deleterious effects of Hg in plants.

本研究旨在评估叶绿素荧光分析在检测汞（Hg）处理对浮萍属植物浮萍影响方面的有效性。结果表明，Hg 处理（范围为 0.0 至 0.4 μM）显著影响植物的光合作用能力，导致可变叶绿素荧光、能量通量、反应中心密度和性能指数降低。在高浓度 Hg 处理的植物中观察到电子传递完全抑制，并且量子产率的初级光化学和耗散能量与吸收的比例均随 Hg 浓度的增加而降低。性能指数（PI）受 Hg 浓度的显著影响，在接受最高 Hg 浓度处理的植物中达到零。总的来说，JIP 分析被发现是一种有效工具，可用于检测 Hg 对植物的有害影响。