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- W2898321624 abstract "Selenium (Se) is an essential trace element for plants, animals and humans. Se enrichment has been deemed as a new approach to enhance the nutrient and economic value of seaweed to make it commercially competitive. To explore the effects of Se on seaweed photosynthesis, Ulva fasciata (Chlorophyta) and Gracilaria lemaneiformis (Rhodophyta) were cultured over 1 week in selenite (Na2SeO3) concentrations of 0, 200, 500, 800 mg L −1. Our results showed that, U. fasciata and G. lemaneiformis effectively accumulated Se and transformed inorganic Se to organic Se at the rate of about 80% during cultivation. Se exerted positive effect on growth and photosynthesis in the three Se concentrations (200, 500, 800 mg L−1 selenite) with the optimum concentration 200 mg L−1 in Ulva and 500 mg L−1 in Gracilaria, and Se promoted growth of seaweeds Gracilaria and Ulva, accumulating more soluble protein (SP) and carbohydrate (SC). Also, photosynthesis was improved by promotion of photosynthetic pigments (Chl a, Car, PE, PC), stimulation of photosystem II (PSII) (Fv/Fm, a, rETRm), and enhancement of photosynthetic oxygen evolution (Pn, AE). In addition, Se stimulated activities of SOD, POD, CAT and GPX with all Se concentrations in Ulva and Gracilaria, and substantially decreased MDA levels in 200 mg L−1 selenite, indicating that Se could increase antioxidative activity and enhance antioxidant system. We proposed that enhanced defensive system of antioxidants by Se could improve and protect photosynthesis to some extent." @default.
- W2898321624 created "2018-11-02" @default.
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- W2898321624 date "2018-12-01" @default.
- W2898321624 modified "2023-10-11" @default.
- W2898321624 title "Effects of selenite on growth, photosynthesis and antioxidant system in seaweeds, Ulva fasciata (Chlorophyta) and Gracilaria lemaneiformis (Rhodophyta)" @default.
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- W2898321624 doi "https://doi.org/10.1016/j.algal.2018.10.004" @default.
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