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Evaluation of the Effect of Growth Factors on Chlorophylls a and b Production from Microalgae

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Bioactive Extracts from Yucatán Marine Invertebrates as Modulators of Microalgal Dynamics.

Dawrin Pech-Puch¹, Rita Pires², Bárbara A Rebelo²

¹Escuela Nacional de Estudios Superiores Unidad Mérida (ENES Mérida), Universidad Nacional Autónoma de México (UNAM), Carretera Mérida-Tetiz km 4.5, Tablaje, Catastral No. 6998, Municipio de Ucú, Ucú, CP 97357, Merida, Mexico.

Marine Biotechnology (New York, N.Y.)

|May 19, 2026

Summary

Marine sponge extracts from Mexico show dual effects on microalgae. Some compounds, like arenosclerins A and C, kill microalgae, while others, such as medelamine A and B, promote growth, offering potential for environmental management.

Keywords:

Halichondria melanadocia Haliclona (Rhizoniera) curacaoensis Algicidal Arenosclerin A and C Bioactive compounds Sponges Stimulants

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Prospecting Microbial Strains for Bioremediation and Probiotics Development for Metaorganism Research and Preservation

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Published on: October 31, 2019

Area of Science:

Marine Biology
Natural Products Chemistry
Phycology

Background:

The marine environment is a prolific source of diverse bioactive compounds.
Marine organisms, including sponges, ascidians, and gorgonians, are known to produce secondary metabolites with various biological activities.
Microalgae are crucial primary producers in aquatic ecosystems, and their growth can be modulated by external factors.

Purpose of the Study:

To investigate the modulatory effects of marine natural products on microalgal growth.
To identify specific compounds from marine sponges exhibiting algicidal or growth-promoting activities.
To explore the potential applications of these marine-derived compounds in environmental management.

Main Methods:

Collection and extraction of marine invertebrates from the Yucatán Peninsula, Mexico.
Screening of 65 extracts for effects on the growth of four microalgal species.
Bioassay-guided fractionation of active extracts to isolate and identify key compounds.
Chemical characterization of isolated compounds using spectroscopic methods.

Main Results:

Several extracts displayed significant algicidal or growth-promoting effects on microalgae.
Arenosclerins A and C, isolated from Haliclona (Rhizoniera) curacaoensis, demonstrated potent algicidal activity against all tested microalgal species.
Medelamine A and B, identified in the Halichondria melanadocia extract, were found to promote microalgal growth.

Conclusions:

Marine sponge metabolites possess dual activity, capable of inhibiting or stimulating microalgal growth.
Arenosclerins A, C, medelamine A, and B represent novel microalgae-modulating agents from marine sponges.
These findings highlight the potential of marine natural products for developing sustainable solutions in environmental management, such as controlling algal blooms or enhancing aquaculture.