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Related Concept Videos

Green Algae01:21

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...
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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...

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Related Experiment Video

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Lethality Bioassay Using Artemia salina L.
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Published on: October 11, 2022

[Allelopathic effect of artemisinin on green algae].

Ye-Kuan Wu1, Ling Yuan, Jian-Guo Huang

  • 1College of Natural Resources and Environment, Southwest University, Chongqing 400716, China.

Zhongguo Zhong Yao Za Zhi = Zhongguo Zhongyao Zazhi = China Journal of Chinese Materia Medica
|August 16, 2013
PubMed
Summary

Artemisinin promotes green algae growth at low concentrations but inhibits it at high concentrations. This study reveals artemisinin

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Published on: January 28, 2020

Area of Science:

  • Environmental toxicology
  • Algal biology
  • Phytochemistry

Background:

  • Artemisia annua cultivation is increasing globally.
  • Potential ecological impacts of artemisinin on aquatic ecosystems are not fully understood.

Purpose of the Study:

  • To investigate the effects of varying artemisinin concentrations on green algae growth.
  • To assess the ecological risks associated with artemisinin exposure.

Main Methods:

  • Conducted 96-hour toxicity tests on Chlorella pyrenoidosa and Scenedesmus oblique.
  • Monitored growth, chlorophyll, protein, oxygen, conductivity, SOD, CAT, and MDA levels.

Main Results:

  • Low artemisinin concentrations (<40 µg/L) stimulated algal growth and increased chlorophyll/protein.
  • High artemisinin concentrations (>80 µg/L) inhibited growth and reduced chlorophyll/protein.
  • Artemisinin induced oxidative damage, particularly lipid peroxidation, affecting cell membranes.

Conclusions:

  • Artemisinin exhibits a dual effect on green algae: growth promotion at low doses and inhibition at high doses.
  • The primary ecotoxicological mechanism involves artemisinin-induced oxidative damage to cellular components.
  • Large-scale Artemisia annua cultivation may negatively impact surrounding water productivity.