Leblanc Catherine, Colin Carole, Cosse Audrey, Delage Ludovic, La Barre Stéphane, Morin Pascal, Fiévet Bruno, Voiseux Claire, Ambroise Yves, Verhaeghe Elodie, Amouroux David, Donard Olivier, Tessier Emmanuel, Potin Philippe
Centre national de la recherche scientifique, université Pierre et Marie Curie-Paris-VI, laboratoire international Associé-Dispersal and Adaptation in Marine Species, unité mixte de recherche 7139, 29682 Roscoff cedex, France.
Biochimie. 2006 Nov;88(11):1773-85. doi: 10.1016/j.biochi.2006.09.001. Epub 2006 Sep 18.
Brown algal kelp species are the most efficient iodine accumulators among all living systems, with an average content of 1.0% of dry weight in Laminaria digitata, representing a ca. 30,000-fold accumulation of this element from seawater. Like other marine macroalgae, kelps are known to emit volatile short-lived organo-iodines, and molecular iodine which are believed to be a main vector of the iodine biogeochemical cycle as well as having a significant impact on atmospheric chemistry. Therefore, radioactive iodine can potentially accumulate in seaweeds and can participate in the biogeochemical cycling of iodine, thereby impacting human health. From a radioecological viewpoint, iodine-129 (129I, half-life of 1.6 x 10(7) years) is one of the most persistent radionuclide released from nuclear facilities into the environment. In this context, the speciation of iodine by seaweeds is of special importance and there is a need to further understand the mechanisms of iodine uptake and emission by kelps. Recent results on the physiological role and biochemistry of the vanadium haloperoxidases of brown algae emphasize the importance of these enzymes in the control of these processes.
褐藻海带物种是所有生物系统中最有效的碘积累者，在掌状海带中碘的平均含量为干重的1.0%，这意味着该元素从海水中的积累量约为30000倍。与其他海洋大型藻类一样，海带会释放挥发性短寿命有机碘和分子碘，它们被认为是碘生物地球化学循环的主要载体，并且对大气化学有重大影响。因此，放射性碘可能在海藻中积累，并参与碘的生物地球化学循环，从而影响人类健康。从放射生态学的角度来看，碘-129（129I，半衰期为1.6×10^7年）是从核设施释放到环境中的最持久的放射性核素之一。在这种情况下，海藻对碘的形态形成具有特殊重要性，有必要进一步了解海带吸收和释放碘的机制。最近关于褐藻钒卤过氧化物酶的生理作用和生物化学的研究结果强调了这些酶在控制这些过程中的重要性。
