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首页> 外文会议>International Congress on Arsenic in the Environment >Arsenic species and antioxidative responses to arsenic in the silver back fern, Pityrogramma calomelanos (L.) Link
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Arsenic species and antioxidative responses to arsenic in the silver back fern, Pityrogramma calomelanos (L.) Link

机译：银背蕨类植物的砷物种和抗氧化反应，Pittrogramma Calomelanos（L.）Link

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This survey aimed at investigating the arsenic (As) speciation and the responses of the enzymatic antioxidant system in Pityrogramma calomelanos under As stress. Ferns at 4-5 frond stage were grown in half-strength Hoagland's solution containing 0 or 1 mM of As. After 21 days, the As concentrations in pinnules, raquis + stipe, and roots were around of 3108, 275 and 283 mg As kg~(-1), respectively. As was present mainly as arsenite (pinnules, 75%) and arsenate (raquis + stipe 74%, roots 92%). Exposure to As increases the activities of APX and POX in pinnules, and SOD and CAT in roots. Induction of antioxidant enzymes is essential to quench reactive oxygen species to a low level, thus, enhancing continuous As accumulation. Reduction of As is also important to increase the translocation and sequestration in shoot. These results help to understand P. calomelanos As hyperaccumulation.
机译：该调查旨在调查砷（AS）形态和酶抗氧化体系中肌肉抗氧化体系的应激。 4-5个叶子舞台的蕨类舞台上的蕨类植物含有0或1毫米的半强度Hoagland的溶液。 21天后，分别为Pinnules，Raquis + Spripe和根部的浓度，分别为3108,275和283mg为kg〜（-1）。正如主要作为砷酸盐（脊柱，75％）和砷酸盐（Raquis + Spipe 74％，根部92％）一样。暴露于增加Pinnules中APX和POX的活动，以及根系中的草皮和猫。抗氧化酶的诱导对于淬灭反应性氧物质至低水平至关重要，因此，随着积累而增强。减少同样重要的是增加拍摄中的易位和封存也很重要。这些结果有助于了解P. Calomelanos作为超累积。

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