Photoinhibition of photosynthesis in the marine brown algae Fucus serratus as studied in field experiments
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Photoinhibition of photosynthesis in the marine brown alga Fucus serratus as studied in field experiments
In field experiments photoinhibition of photosynthesis'in the intertidal brown alga Fucus serratus was investigated by means of both fluorescence and oxygen measurements. Samples were taken from thalli floating just below the water surface. Dunng falling tides the ratio variable fluorescence/maxlrnum fluorescence (FJF,) decreased with increasing photon fluence rates. As during rising tides only...
متن کاملFertilization in brown algae. I. SEM and other observations on Fucus serratus.
The cell wall secreted immediately following sperm entry into an egg can be visualized by the fluorescent dye Calcofluor white. Cell wall secretion precedes nuclear fusion by 10-20 min. SEM observations of the surface of unfertilized and fertilized eggs and sperm attachment to eggs are described. These results are discussed in relation to fertilization in sea urchins and the biochemical phenome...
متن کاملArsenic biotransformation by the brown macroalga, Fucus serratus.
The brown alga Fucus serratus was maintained in aquaria with added arsenate (0, 20, 50, and 100 microg As/L, four individuals per treatment) for up to 19 weeks. Biotransformation of arsenic by Fucus was monitored by high-performance liquid chromatography/inductively coupled plasma mass spectrometry and liquid chromatography/electrospray mass spectrometry analysis of aqueous extracts of algal fr...
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متن کاملFertilization in brown algae. III. Preliminary characterization of putative gamete receptors from eggs and sperm of Fucus serratus.
Membrane fractions have been isolated from eggs of Fucus serrratus which inhibit fertilization in a species-specific manner. This activity is destroyed by alpha-fucosidase and alpha-mannosidase. Some 6% of the protein of this membrane fraction binds to Con A-agarose, following SDS solubilization, and when eluted with alpha-methyl mannoside inhibits fertilization when preincubated with sperm, bu...
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ژورنال
عنوان ژورنال: Marine Ecology Progress Series
سال: 1990
ISSN: 0171-8630,1616-1599
DOI: 10.3354/meps066175