Algal Growth and Biochemical Responses to Environmental Stress

A special issue of Plants (ISSN 2223-7747). This special issue belongs to the section "Plant Response to Abiotic Stress and Climate Change".

Deadline for manuscript submissions: 30 November 2025 | Viewed by 413

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Botany Department, Federal University of Santa Catarina, Florianópolis 88040-900, SC, Brazil
Interests: photobiology; photosynthesis; ecophysiology; bioremediation
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Faculty of Sciences, University of Magallanes, Punta Arenas, Chile
Interests: seaweed reproduction; ecophysiology; photobiology; aquatic photosynthesis; biotechnology
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Special Issue Information

Dear Colleagues,

Algal growth and biochemical responses to environmental stress play a crucial role in understanding the adaptability of algae to changing environmental conditions. Algae, being primary producers in aquatic ecosystems, are highly sensitive to factors such as temperature, light intensity, salinity, and pollutants. Environmental stress can significantly impact their growth and reproductive patterns, metabolic pathways, and the synthesis of bioactive compounds.

This Special Issue aims to highlight recent advances in the study of algal responses to various environmental stressors, focusing on how these factors influence algal physiology, biochemical composition, and secondary metabolite production. We encourage contributions that explore the molecular mechanisms underlying stress responses in algae, as well as innovative methods for monitoring and enhancing algal growth under adverse environmental conditions.

Dr. José Bonomi Barufi
Dr. Nelso Navarro
Guest Editors

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Keywords

  • algal growth
  • biochemical responses
  • environmental stress
  • secondary metabolites
  • photobiology
  • aquatic photosynthesis
  • carbon fixation
  • photochemical reactions

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Published Papers (1 paper)

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Research

17 pages, 4274 KiB  
Article
Photomorphogenic and Biochemical Effects of Radiation and Nitrate Availability on the Red Alga Plocamium cartilagineum
by Bruna Rodrigues Moreira, Julia Vega, Marta García-Sánchez, Cristina González-Fernández, Antonio Avilés, José Bonomi-Barufi and Félix L. Figueroa
Plants 2025, 14(7), 1121; https://doi.org/10.3390/plants14071121 - 3 Apr 2025
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Abstract
Non-photosynthetic photoreceptors detecting different wavelength ranges in the UV and visible region of spectra may trigger algal acclimation and homeostasis. We studied Plocamium cartilagineum responses based on the saturation of photosynthesis by Amber light and supplementation by different light qualities, applying an experimental [...] Read more.
Non-photosynthetic photoreceptors detecting different wavelength ranges in the UV and visible region of spectra may trigger algal acclimation and homeostasis. We studied Plocamium cartilagineum responses based on the saturation of photosynthesis by Amber light and supplementation by different light qualities, applying an experimental design able to simulate a daily cycle in a fully automated system. Thalli were exposed to Amber, Amber + UV-A, Amber + Blue and Amber + Green radiation treatments under two nitrate levels (60 and 240 μM) for enrichment lasting two weeks. P. cartilagineum photosynthesis and biochemistry were measured during different experimental periods. Photosynthesis showed only slight variations, emphasizing that other response variations could be activated by photomorphogenic pathways. Nitrate assimilation was higher in the treatments containing blue and green lights, potentially caused by increasing nitrate reductase activity. Photosynthetic pigments and mycosporine-like amino acids were affected over the two weeks, being mostly influenced by UV-A and blue radiations with the highest nitrate concentration. The shinorine content of thalli under blue radiation with 240 μM of nitrate increased at day 7, possibly modulated by a blue light photoreceptor. The increase in the bioactive compounds in the short-term by specific light qualities under optimal photosynthetic performance was found to be a relevant biotechnological strategy. Full article
(This article belongs to the Special Issue Algal Growth and Biochemical Responses to Environmental Stress)
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