Microalgae as biostimulants: a new approach in agriculture

González-Pérez, Brenda Karen; Rivas-Castillo, Andrea M.; Valdez-Calderón, Alejandro; Gayosso-Morales, Manuel Aaron

doi:10.1007/s11274-021-03192-2

Cited by 35 publications

(11 citation statements)

References 82 publications

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“…In addition to the horticulture crops, FS of cellular extracts of Spirulina platensis and Scenedesmus spp., resulted in enhanced root weight, plant growth, number of flowers per plant, earliness of flowering and flower diameter in Petunia x hybrid plant ( Plaza et al., 2018 ). Evaluation of the composition of microalgae cell hydrolysates revealed the presence of plant growth-promoting substances such as phytohormones (auxins and cytokinins), signaling molecules such as betaines, AAs, vitamins, polyamines, (spermine and spermidine), and polysaccharides mainly beta-glucan apart from micronutrients ( González-Pérez et al., 2022 ). Among the various microalgae species, extracts and hydrolysates derived from Spirulina platensis , Chlorella vulgaris and Scendesmus spp., are most utilized for FS application ( Arahou et al., 2022 ; González-Pérez et al., 2022 ).…”

Section: Methods Of Application Of Microalgae-based Bio Fertilizer An...mentioning

confidence: 99%

“…In addition, we describe the mechanism of biostimulant action of various microalgae metabolites along with their effects on plants under different modes of application namely seed treatments, foliar spray and soil drenching. Although few reviews and status papers on this topic are available, they seldom discuss the functionalities of various class of biostimulants present in microalgae ( Chiaiese et al., 2018 ; Arahou et al., 2022 ; González-Pérez et al., 2022 ). Another important highlight of this review is the description of mechanisms involved in the abiotic and biotic stress tolerances imparted by microalgae on crops along with case studies; which have not been reviewed critically in earlier reports such as ( Kapoore et al., 2021 ; González-Pérez et al., 2022 ).…”

Section: Introductionmentioning

confidence: 99%

“…Although few reviews and status papers on this topic are available, they seldom discuss the functionalities of various class of biostimulants present in microalgae ( Chiaiese et al., 2018 ; Arahou et al., 2022 ; González-Pérez et al., 2022 ). Another important highlight of this review is the description of mechanisms involved in the abiotic and biotic stress tolerances imparted by microalgae on crops along with case studies; which have not been reviewed critically in earlier reports such as ( Kapoore et al., 2021 ; González-Pérez et al., 2022 ). Further, we address the various challenges involved in the microalgae bioprocesses and describe different strategies such as integration of bioremediation with biomass production and biorefinery approaches to improve the sustainability quotient.…”

Section: Introductionmentioning

confidence: 99%

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Microalgae as next generation plant growth additives: Functions, applications, challenges and circular bioeconomy based solutions

2023

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Sustainable agriculture practices involve the application of environment-friendly plant growth promoters and additives that do not negatively impact the health of the ecosystem. Stringent regulatory frameworks restricting the use of synthetic agrochemicals and the increase in demand for organically grown crops have paved the way for the development of novel bio-based plant growth promoters. In this context, microalgae biomass and derived agrochemicals offer novel sources of plant growth promotors that enhance crop productivity and impart disease resistance. These beneficial effects could be attributed to the presence of wide range of biomolecules such as soluble amino acid (AA), micronutrients, polysaccharides, phytohormones and other signaling molecules in microalgae biomass. In addition, their phototrophic nature, high photosynthetic efficiency, and wide environmental adaptability make them an attractive source of biostimulants, biofertilizers and biopesticides. The present review aims to describe the various plant growth promoting metabolites produced by microalgae and their effects on plant growth and productivity. Further, the effects elicited by microalgae biostimulants with respect to different modes of applications such as seed treatments, foliar spray and soil/root drenching is reviewed in detail. In addition, the ability of microalgae metabolites to impart tolerance against various abiotic and biotic stressors along with the mechanism of action is discussed in this paper. Although the use of microalgae based biofertilizers and biostimulants is gaining popularity, the high nutrient and water requirements and energy intensive downstream processes makes microalgae based technology commercially unsustainable. Addressing this challenge, we propose a circular economy model of microalgae mediated bioremediation coupled with biorefinery approaches of generating high value metabolites along with biofertilizer applications. We discuss and review new trends in enhancing the sustainability of microalgae biomass production by co-cultivation of algae with hydroponics and utilization of agriculture effluents.

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Section: Methods Of Application Of Microalgae-based Bio Fertilizer An...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Microalgae as next generation plant growth additives: Functions, applications, challenges and circular bioeconomy based solutions

2023

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“…However, the microalgae biomass is more affordable and less complicated to standardize as a raw material for plant biostimulants [ 210 ]. The sustainability of microalgae-based plant biostimulant production is higher than that of seaweed-based plant biostimulants [ 211 ].…”

Section: Enhanced Biotechnological Production Of Microalgae-based Hig...mentioning

confidence: 99%

Humic Substances as Microalgal Biostimulants—Implications for Microalgal Biotechnology

Popa

Lupu

Constantinescu-Aruxandei

et al. 2022

Marine Drugs

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Humic substances (HS) act as biostimulants for terrestrial photosynthetic organisms. Their effects on plants are related to specific HS features: pH and redox buffering activities, (pseudo)emulsifying and surfactant characteristics, capacity to bind metallic ions and to encapsulate labile hydrophobic molecules, ability to adsorb to the wall structures of cells. The specific properties of HS result from the complexity of their supramolecular structure. This structure is more dynamic in aqueous solutions/suspensions than in soil, which enhances the specific characteristics of HS. Therefore, HS effects on microalgae are more pronounced than on terrestrial plants. The reported HS effects on microalgae include increased ionic nutrient availability, improved protection against abiotic stress, including against various chemical pollutants and ionic species of potentially toxic elements, higher accumulation of value-added ingredients, and enhanced bio-flocculation. These HS effects are similar to those on terrestrial plants and could be considered microalgal biostimulant effects. Such biostimulant effects are underutilized in current microalgal biotechnology. This review presents knowledge related to interactions between microalgae and humic substances and analyzes the potential of HS to enhance the productivity and profitability of microalgal biotechnology.

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“…In the last few decades, the increasing interest in these microorganisms stimulated scientists to investigate how to use them as sources of biomolecules or as sustainable solutions for environmental issues [ 5 , 6 , 7 , 8 , 9 ]. For instance, microalgae can be used for bioremediation [ 8 , 9 , 10 ], or as biofertilizers and biostimulants or biopesticides [ 7 , 11 , 12 , 13 , 14 , 15 , 16 ]. Due to their high concentrations of proteins, vitamins, and fatty acids, microalgae have been also evaluated as possible nutrients for different animals including both aquatic and terrestrial species [ 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 ].…”

Section: Introductionmentioning

confidence: 99%

Fungal Contamination in Microalgal Cultivation: Biological and Biotechnological Aspects of Fungi-Microalgae Interaction

Laezza

Salbitani

Carfagna

2022

JoF

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In the last few decades, the increasing interest in microalgae as sources of new biomolecules and environmental remediators stimulated scientists’ investigations and industrial applications. Nowadays, microalgae are exploited in different fields such as cosmeceuticals, nutraceuticals and as human and animal food supplements. Microalgae can be grown using various cultivation systems depending on their final application. One of the main problems in microalgae cultivations is the possible presence of biological contaminants. Fungi, among the main contaminants in microalgal cultures, are able to influence the production and quality of biomass significantly. Here, we describe fungal contamination considering both shortcomings and benefits of fungi-microalgae interactions, highlighting the biological aspects of this interaction and the possible biotechnological applications.

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Microalgae as biostimulants: a new approach in agriculture

Cited by 35 publications

References 82 publications

Microalgae as next generation plant growth additives: Functions, applications, challenges and circular bioeconomy based solutions

Microalgae as next generation plant growth additives: Functions, applications, challenges and circular bioeconomy based solutions

Humic Substances as Microalgal Biostimulants—Implications for Microalgal Biotechnology

Fungal Contamination in Microalgal Cultivation: Biological and Biotechnological Aspects of Fungi-Microalgae Interaction

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