Research results published by the Institute of Geochemical Research on the effects of selenium and mercury on rice plants
Since Parizek and Ostadalova first reported the inhibitory effect of selenium on mercury toxicity in 1967, the study of selenium-mercury interaction has attracted extensive attention from scientists. A large number of studies on microorganisms, fish, poultry, humans and other mammals Confirmed the mutual restriction and influence relationship between selenium and mercury. However, in contrast, research on plants is rarely reported.
Feng Xinbin's research group of Institute of Geochemistry, Chinese Academy of Sciences published an article in the new issue of ES & T (2012: Volume 46, Issue 18, 10040–10046), which reported for the first time in the world the absorption, migration and distribution of mercury in rice plants Influence and constraints. The article points out that the increase in the content of selenium in the rhizosphere soil will significantly inhibit the absorption and translocation of inorganic mercury and methylmercury in the soil from the stems, leaves and fruits above the roots of rice. This phenomenon may be related to the root environment or roots of plants The Hg-Se insoluble complex produced is related.
This discovery provides a possible way to rehabilitate mercury-contaminated soil in mercury mining areas and solve the problem of rice methylmercury enrichment. It has important scientific and practical significance. However, it is worth emphasizing that before practical application, it must be fully recognized that the addition of excessive selenium may also cause toxicity to the organism and cause new risks of selenium and mercury compound pollution.
The research results were supported by the Youth Innovation Promotion Association of the Chinese Academy of Sciences.
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