Microalgae associated to humic acid as a novel biostimulant improving onion growth and yield

Gemin, Luiz Gabriel; Mógor, Átila Francisco; Amatussi, Juliana de Oliveira; Mógor, Gilda

doi:10.1016/j.scienta.2019.108560

Cited by 46 publications

(17 citation statements)

References 23 publications

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“…In addition to this, higher amounts of minerals were observed in onion plants treated with "cow dung + S. platensis" and "cow dung + C. vulgaris" (Dineshkumar et al, 2020). Furthermore, compared to the untreated control, treatment with a mixture of Scenedesmus subspicatus and humic acid synergistically increased the onion root length by 39% and the concentration of soluble proteins by 37% (Gemin et al, 2019).…”

Section: Scenedesmus Quadricaudamentioning

confidence: 79%

Potential of Algae–Bacteria Synergistic Effects on Vegetable Production

Kang¹,

Kim

Shim

et al. 2021

Front. Plant Sci.

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Modern agriculture has become heavily dependent on chemical fertilizers, which have caused environmental pollution and the loss of soil fertility and sustainability. Microalgae and plant growth-promoting bacteria (PGPB) have been identified as alternatives to chemical fertilizers for improving soil fertility. This is because of their biofertilizing properties, through the production of bioactive compounds (e.g., phytohormones, amino acids, and carotenoids) and their ability to inhibit plant pathogens. Although treatment based on a single species of microalgae or bacteria is commonly used in agriculture, there is growing experimental evidence suggesting that a symbiotic relationship between microalgae and bacteria synergistically affects each other’s physiological and metabolomic processes. Moreover, the co-culture/combination treatment of microalgae and bacteria is considered a promising approach in biotechnology for wastewater treatment and efficient biomass production, based on the advantage of the resulting synergistic effects. However, much remains unexplored regarding the microalgal–bacterial interactions for agricultural applications. In this review, we summarize the effects of microalgae and PGPB as biofertilizing agents on vegetable cultivation. Furthermore, we present the potential of the microalgae–PGPB co-culture/combination system for the environmentally compatible production of vegetables with improved quality.

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Section: Scenedesmus Quadricaudamentioning

confidence: 79%

Potential of Algae–Bacteria Synergistic Effects on Vegetable Production

Kang¹,

Kim

Shim

et al. 2021

Front. Plant Sci.

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“…A limited number of works are reported on the seedling with the immersion method under field and greenhouse condition (Bettoni et al, 2016a,b;Gemin et al, 2019). This method is commonly used in hydroponic and growth chamber conditions ( Supplementary Table S1).…”

Section: Immersionmentioning

confidence: 99%

From Lab to Field: Role of Humic Substances Under Open-Field and Greenhouse Conditions as Biostimulant and Biocontrol Agent

et al. 2020

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The demand for biostimulants has been growing at an annual rate of 10 and 12.4% in Europe and Northern America, respectively. The beneficial effects of humic substances (HS) as biostimulants of plant growth have been well-known since the 1980s, and they can be supportive to a circular economy if they are extracted from different renewable resources of organic matter including harvest residues, wastewater, sewage sludge, and manure. This paper presents an overview of the scientific outputs on application methods of HS in different conditions. Firstly, the functionality of HS in the primary and secondary metabolism under stressed and non-stressed cropping conditions is discussed along with crop protection against pathogens. Secondly, the advantages and limitations of five different types of HS application under open-fields and greenhouse conditions are described. Key factors, such as the chemical structure of HS, application method, optimal rate, and field circumstances, play a crucial role in enhancing plant growth by HS treatment as a biostimulant. If we can get a better grip on these factors, HS has the potential to become a part of circular agriculture.

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“…Moreover, HS application increased early yield in potato crop when plants were grown under low temperatures and water availability [156], while the incorporation of HS in growing medium increased seed germination and seedling growth in tomato and okra [157,158]. Similar positive effects of HS application were observed on garlic through the stimulation of N and S uptake [159,160], or on onion plants without however significant correlations between the yield and nutrients uptake [161]. The increased yield and quality of potato tubers after the incorporation of HS in soil was attributed to the better availability use efficiency of nutrients due to reduced leaching, as well as to increased water holding capacity of soil [162,163].…”

Section: Practical Applications Of Biostimulants and Biostimulatory Products On Horticultural Cropsmentioning

confidence: 89%

Biostimulants Application: A Low Input Cropping Management Tool for Sustainable Farming of Vegetables

et al. 2021

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Biostimulants, are a diverse class of compounds including substances or microorganism which have positive impacts on plant growth, yield and chemical composition as well as boosting effects to biotic and abiotic stress tolerance. The major plant biostimulants are hydrolysates of plant or animal protein and other compounds that contain nitrogen, humic substances, extracts of seaweeds, biopolymers, compounds of microbial origin, phosphite, and silicon, among others. The mechanisms involved in the protective effects of biostimulants are varied depending on the compound and/or crop and mostly related with improved physiological processes and plant morphology aspects such as the enhanced root formation and elongation, increased nutrient uptake, improvement in seed germination rates and better crop establishment, increased cation exchange, decreased leaching, detoxification of heavy metals, mechanisms involved in stomatal conductance and plant transpiration or the stimulation of plant immune systems against stressors. The aim of this review was to provide an overview of the application of plant biostimulants on different crops within the framework of sustainable crop management, aiming to gather critical information regarding their positive effects on plant growth and yield, as well as on the quality of the final product. Moreover, the main limitations of such practice as well as the future prospects of biostimulants research will be presented.

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Microalgae associated to humic acid as a novel biostimulant improving onion growth and yield

Cited by 46 publications

References 23 publications

Potential of Algae–Bacteria Synergistic Effects on Vegetable Production

Potential of Algae–Bacteria Synergistic Effects on Vegetable Production

From Lab to Field: Role of Humic Substances Under Open-Field and Greenhouse Conditions as Biostimulant and Biocontrol Agent

Biostimulants Application: A Low Input Cropping Management Tool for Sustainable Farming of Vegetables

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