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Use of elicitors from macroalgae and microalgae in the management of pests and diseases in agriculture

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Abstract

Feeding a growing population is a big challenge for agriculture, being necessary for new and ecological alternatives to reduce chemical fertilizers and pesticides. Scientists have found that micro- and macroalgae are essential reservoirs of chemical compounds with a high potential role as biopesticides. Some of these molecules can act as elicitors, activating systemic and local defensive responses even without biotic stress. Among elicitors from macroalgae, there are ulvans, laminarin, alginate, carrageenan, glucuronan, fucans and tannins, which can activate plant defenses against viruses, bacteria, fungi, oomycetes, nematodes, and insects. The induction of defense mechanisms on crops by microalgae is related to their application as biomass, polysaccharides, exopolysaccharide or other elicitors, such as lactic acid or glucosamine. Unlike macroalgae, the biopesticide effect by microalgae has only been described against bacteria, fungi, and oomycetes, being necessary more studies to elucidate and discover their role as elicitors. In general, both macro- and microalgae are sources of compounds with great potential as biopesticides following the current needs for the development of sustainable agriculture.

Highlights

  • Macro and microalgae are new sources of elicitors with agricultural potential.

  • These algae elicitors activate plant defenses by different mechanisms.

  • Macroalgae elicitors reduce crop losses caused by pathogens and pests.

  • Microalgae elicitors reduce crop losses caused by pathogens.

  • Algae elicitors can be used in a sustainable agriculture development.

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Funding

Grants for the Recualification of the Spanish University System for 2021–2023, Public University of Navarra; Recualification Modality; Funded by the European Union – NextGenerationEU.

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Contributions

J.P. conceptualized and designed the manuscript. J.P. performed the bibliographic search and analyzed the information. J.P. wrote the first version of the manuscript. A.D.M. contributed to the manuscript writing, correction and critical reading. All authors have read and agreed to the published version of the manuscript.

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Correspondence to Jorge Poveda.

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The authors declare no competing interests.

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Poveda, J., Díez-Méndez, A. Use of elicitors from macroalgae and microalgae in the management of pests and diseases in agriculture. Phytoparasitica 51, 667–701 (2023). https://doi.org/10.1007/s12600-022-01009-y

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  • DOI: https://doi.org/10.1007/s12600-022-01009-y

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