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- W2020165982 abstract "In many dinoflagellates, it has been a challenging task to study the qualitative and quantitative processes leading to encystment because gametes are often not morphologically distinguishable from other vegetative cells. We examined whether sexual differentiation is accompanied by changes in cell surface glycoprotein properties that are reflected in the binding patterns of complementary lectins. Labeling percentages of nine different fluorescein isothiocyanate (FITC)-conjugated lectins were analyzed together with cell and cyst abundance in N-deplete and f/2 control cultures of Scrippsiella lachrymosa Lewis throughout an encystment experiment. Although labeling varied between lectins and treatments and considerable changes occurred through time, no direct correlation was observed between glycoconjugate properties and sexual life cycle processes. A conspicuous decrease in labeling of lectins that are complementary to amino sugars (in particular, with WGA, a lectin that is complementary to N-acetylglucosamine) was observed in the low nitrogen treatment, suggesting a link between the nutrient status of a cell and expression of surface carbohydrates. Presumably, the reduction of N-acetylglucosamine residues was an early indication of N stress in cell populations. Labeling experiments with phosphate-limited cells showed that the decrease in WGA-complementary amino-sugar residues was not specific for N stress, but appeared to be a general response to nutrient limitation. Our findings confirm that glycoconjugate composition of dinoflagellate cells can change depending on their physiological state, which has to be considered when applying lectins for taxonomic differentiation of dinoflagellate species." @default.
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- W2020165982 date "2004-08-01" @default.
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- W2020165982 title "Lectin binding patterns of Scrippsiella lachrymosa (Dinophyceae) in relation to cyst formation and nutrient conditions" @default.
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- W2020165982 doi "https://doi.org/10.1016/j.jembe.2004.02.004" @default.
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