Effects of selenium on antioxidant enzymes and photosynthesis in the edible seaweed Gracilaria lemaneiformis

Effects of selenium on antioxidant enzymes and photosynthesis in the edible seaweed Gracilaria lemaneiformis
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硒对龙须菜抗氧化酶和光合作用的影响

DOI:
10.1007/s10811-018-1647-3
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发表时间:
2018-10
影响因子:
3.3
通讯作者:
Yang Y
Yang Y
中科院分区:
生物学3区
文献类型:
--
作者:
Wang Q;Zuo Y;Chen T;Zheng W;Yang Y

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江蓠属是我国仅次于海带的第二大养殖海藻属。重要的是要提高其经济价值。研究龙须菜对硒的富集和生物转化。将海藻在含有0至2000 mg L-1亚硒酸盐的培养基中培养12天。当浓度低于750 mg L−1时,海藻的生长得到促进,叶绿素a的含量下降。在所有组中,海藻中的有机硒含量超过80%,干重高达400 μg g−1。硒的富集导致海藻细胞超氧化物歧化酶活性下降。这些结果表明G.龙须菜属植物对硒具有耐受性,并通过改变各种代谢过程来防止植物毒性。此外,这种海藻具有很大的潜力,无机硒转化为有机形式,因此可能是一个安全的候选人,用于生产富硒功能食品。
Gracilaria is the second most productive genus of mariculture seaweeds after Laminaria in China. It is important to increase its economic value. The purpose of this study was to document the accumulation and biotransformation of selenium in Gracilaria lemaneiformis. The seaweed was cultured for 12 days in medium containing from 0 to 2000 mg L−1 selenite. At concentrations lower than 750 mg L−1, seaweed growth was promoted and the amount of chlorophyll a decreased. The organic Se content in the seaweed was over 80% in all groups and was as much as 400 μg g−1 of dry weight. Se enrichment induced a decrease in the activities of superoxide dismutase in the seaweed cells. These results suggest that G. lemaneiformis is tolerant to Se and prevents phytotoxicity by altering various metabolic processes. Furthermore, this seaweed exhibits great potential to transform inorganic Se into the organic form and therefore could be a safe candidate for the production of Se-enriched functional food.
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