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- W3129597750 abstract "Karenia mikimotoi is an important toxin-producing dinoflagellate, frequently forming blooms along the coast of China. It has been shown that K. mikimotoi has allelopathic effects on other organisms, which benefited it over other microalgal species in competition. However, the underlying allelopathy mechanisms remain largely unclear. Thalassiosira pseudonana, a worldwide-distributed planktonic diatom, is extensively used as a model in diatom physiology studies. Here, we investigated the responses of T. pseudonana to K. mikimotoi allelopathy when they were co-cultured under laboratory condition. We found that there were reciprocal inhibitory effects between K. mikimotoi and T. pseudonana, and the cell-free filtrate of K. mikimotoi also deeply suppressed the growth of T. pseudonana, corroborating that K. mikimotoi allelopathy mainly accounted for the inhibition of K. mikimotoi against T. pseudonana. After exposed to K. mikimotoi allelopathy, the photosynthetic efficiency, contents of neutral lipid and malondialdehyde (MDA), as well as superoxide dismutase (SOD) activity in T. pseudonana were significantly changed. Meanwhile, the expression of genes involved in photosynthesis, oxidative phosphorylation, detoxifying system and nutrients uptake including PsbO, chlorophyll synthase (ChlG), risp1, ferredoxin-NADP+ reductase (PetH), ABCB1, nitrate transporters 1 (NRT1), phosphate transporter (PHT), alkaline phosphatase (ALP) and ascorbate peroxidase (APX) in T. pseudonana dramatically altered. These results suggested that K. mikimotoi could highly affect the efficiency of photosynthesis and energy metabolism of T. pseudonana, and also inhibit the nutrients uptake and assimilation. Our findings might provide insight information for the K. mikimotoi allelopathy." @default.
- W3129597750 created "2021-03-01" @default.
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- W3129597750 date "2021-04-01" @default.
- W3129597750 modified "2023-10-02" @default.
- W3129597750 title "Allelopathy and underlying mechanism of Karenia mikimotoi on the diatom Thalassiosira pseudonana under laboratory condition" @default.
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- W3129597750 doi "https://doi.org/10.1016/j.algal.2021.102229" @default.
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