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Red Algae

Red Algae

Red algae, also known as rhodophytes, are primarily found in marine environments, though some species inhabit freshwater and terrestrial ecosystems. These organisms exist in both unicellular and multicellular forms, with some multicellular varieties reaching macroscopic sizes.As phototrophic organisms, red algae contain chlorophyll a; however, their chloroplasts lack chlorophyll b. Instead, they possess phycobiliproteins, which serve as major light-harvesting pigments, similar to those found in...

Other Algae

Other Algae

The group Stramenopiles include some phototrophic microorganisms. Members of this group possess flagella covered in numerous short, hairlike extensions, a feature that inspired the group's name, derived from the Latin words for "straw" and "hair." Some of the main categories of Stramenopiles include diatoms, golden algae, and brown algae.Diatoms are unicellular, photosynthetic eukaryotes, with over 200 known genera. They play a key role in the planktonic communities of both marine and...

Green Algae

Green Algae

Green algae, also referred to as chlorophytes, are different from red algae in having the chloroplasts containing chlorophylls a and b, which give them their distinct green hue. However, they lack phycobiliproteins, preventing them from developing the red or blue-green pigmentation seen in red algae. In terms of photosynthetic pigment composition, green algae closely resemble plants and share a close evolutionary relationship with them. Taxonomically Green algae belong to Phylum Chlorophyta in...

Diversity of Protists III

Diversity of Protists III

Rhizaria are a diverse group of unicellular protists characterized by their threadlike cytoplasmic extensions known as pseudopodia. These structures aid in both locomotion and feeding, giving Rhizaria an amoeboid appearance. Their amoeboid morphology once led to taxonomic confusion, but molecular phylogenetics has clarified their evolutionary placement and emphasized their shared use of pseudopodia despite divergent lineages.This clade comprises diverse lineages such as Chlorarachniophyta,...

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Most organisms use photoreceptors to sense and respond to light. Examples of photoreceptors include bacteriorhodopsins and bacteriophytochromes in some bacteria, phytochromes in plants, and rhodopsins in the photoreceptor cells of the vertebral retina. The light-sensitive property of these receptors is because of the bound chromophores, such as bilin in the phytochromes and retinal in the rhodopsins.
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Related Experiment Video

Updated: Mar 19, 2026

Measuring Photophysiology of Attached Stage of Colacium sp. by a Cuvette-Type Fast Repetition Rate Fluorometer

Measuring Photophysiology of Attached Stage of Colacium sp. by a Cuvette-Type Fast Repetition Rate Fluorometer

Published on: November 12, 2021

Rhenium uptake and distribution in phaeophyceae macroalgae, Fucus vesiculosus.

B Racionero-Gómez¹, A D Sproson¹, D Selby¹

¹Department of Earth Sciences , Durham University , Durham DH1 3LE , UK.

Royal Society Open Science

|June 14, 2016

Summary

This summary is machine-generated.

Living macroalgae, like Fucus vesiculosus, actively absorb Rhenium (Re), suggesting potential for phytomining and bioremediation. This uptake indicates a biological process, not just incorporation into decomposing organic matter.

Keywords:

bioremediation distribution macroalgae phytomining rhenium uptake

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Last Updated: Mar 19, 2026

Measuring Photophysiology of Attached Stage of Colacium sp. by a Cuvette-Type Fast Repetition Rate Fluorometer

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Published on: November 12, 2021

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Analysis of Fatty Acid Content and Composition in Microalgae

Analysis of Fatty Acid Content and Composition in Microalgae

Published on: October 1, 2013

Area of Science:

Biogeochemistry
Marine Biology
Environmental Science

Background:

Rhenium (Re) accumulation in oil kerogens is poorly understood, with a common assumption of incorporation into decomposing biomass.
Living macroalgae concentrate Re significantly higher than seawater, challenging existing hypotheses.

Purpose of the Study:

To investigate Rhenium uptake and localization in the macroalga Fucus vesiculosus.
To determine if Re accumulation is an active biological process.

Main Methods:

Fucus vesiculosus tip cultures were grown in seawater with varying concentrations of Rhenium(VII) compounds.
Re abundance and localization within the macroalgal biomass were analyzed.

Main Results:

Re abundance varied within F. vesiculosus, not localized to a single structure.
A positive correlation exists between seawater Re concentration and Re accumulation in algal tips.
Re uptake was dependent on metabolic activity, indicating bioadsorption/bioaccumulation.

Conclusions:

Macroalgae actively uptake and tolerate Rhenium, suggesting a biological mechanism.
F. vesiculosus demonstrates potential for Rhenium phytomining and bioremediation applications.
Re is not localized in chloroplasts or cytoplasmic proteins, and uptake is metabolically dependent.