Dissolved oxygen-quenched fluorescence/materials movement-induced beam deflection: A novel method for measuring heavy metal stress in aquatic plants

DOI Web Site 参考文献14件 オープンアクセス
  • WU Xing-Zheng
    Department of Life, Environment and Materials Science, Fukuoka Institute of Technology
  • PATTHAMAWAN Kansuk
    Department of Life, Environment and Materials Science, Fukuoka Institute of Technology

抄録

<p>Heavy metal ions greatly impact the physiological activities of aquatic plants. Effects of the ions Cu2+, Ni2+, and Co2+ on the physiological activities of aquatic plant were studied using the dissolved oxygen (DO)-quenched fluorescence/materials movement-induced probe beam deflection method. An Ru(II) complex was used as a fluorescence probe, with Egeria densa as the model aquatic plant for this study. DO-quenched fluorescence of the Ru(II) complex as well as the materials movement-induced beam deflection at vicinities of the aquatic plant were simultaneously monitored for real-time observations. The simulataneous monitoring were conducted on various plant parts with and without the presence of 1-μM heavy metal ions, such as Cu2+, Ni2+, and Co2+. Results showed that the presence of the 1-μM heavy metal ions greatly altered changing trends of both DO and beam deflection over time in both the photosynthetic and respiration processes for the plant. This altering suggests that the existence of the 1-μM heavy metal ions has greatly changed the physiological processes in the aquatic plant. Based on study results, this method has the potential to be used as a new sensitive tool for monitoring heavy metal stress effects on aquatic plants.</p>

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