Algal biomass from wastewater: soil phosphorus bioavailability and plants productivity

Castro, Jackeline de Siqueira; Calijuri, Maria Lúcia; Mattiello, Edson Márcio; Ribeiro, Vinícius José; Assemany, Paula Peixoto

doi:10.1016/j.scitotenv.2019.135088

Cited by 37 publications

(5 citation statements)

References 22 publications

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“…The P-sufficient vigorously dividing cultures continue to consume P at a steady rate, and the sustained bioremoval of Pi is currently the mainstream approach in environmental applications [17,106,107]. Although the absolute amount of P removed by such cultures can be significant, complete P removal from the medium of dense P-sufficient cultures is difficult to achieve because of the release of P into the medium e.g., from dead cells.…”

Section: Cultivation Conditions and P Nutrition History Of The Culturementioning

confidence: 99%

“…Although the evidence supporting the suitability of microalgal biomass for the production of the green P-rich biofertilizer, biostimulants, biocontrol agents, and soil conditioners is growing, there is a need for further research in this direction. Thus, the rate of microalgal biomass supplementation to the conventional P fertilizers such as triple superphosphate to reduce the application rate of the latter requires precise optimization to avoid adverse effects of biomass on the dissolvability of the superphosphate [106,124].…”

Section: Microalgal Biomass Is An Efficient and Environtally Friendly...mentioning

confidence: 99%

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Getting Grip on Phosphorus: Potential of Microalgae as a Vehicle for Sustainable Usage of This Macronutrient

Solovchenko,

Plouviez,

Khozin-Goldberg

2024

Preprint

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Phosphorus (P) is an important and irreplaceable macronutrient. It is central to energy and information storage and exchange in living cell. P is an element with “broken geochemical cycle” since it lacks abundant volatile compounds capable of closing the P cycle. P fertilizers are critical for global food security, but the reserves of minable P are scarce and non-evenly distributed between countries of the world. Accordingly, the risks of global crisis due to limited access to P reserves is expected to be graver than those entailed by competition for fossil hydrocarbons. Paradoxically, despite the scarcity and value of P reserves, its usage is extremely inefficient: current waste rate reaches 80% giving rise to a plethora of unwanted consequences such as eutrophication leading to harmful algal blooms. Microalgal biotechnology comprise a promising solution to tackle this challenge. The proposed review briefly presents the relevant aspects of microalgal P metabolism such as cell P reserve composition and turnover, and the regulation of P uptake kinetics for maximization of P uptake efficiency with the focus on novel knowledge. Multifaceted role of polyPhosphates, the largest cell depot for P, is discussed with emphasis on the P toxicity mediated by short-chain polyPhosphates. Opportunities and hurdles of P bioremoval via P uptake from waste streams with microalgal cultures, either suspended or immobilized, is discussed along with the role of bacterial components of microalgal-bacterial consortia in these processes. Possible avenues of P-rich microalgal biomass such as biofertilizer production or extraction of valuable polyPhosphates and other bioproducts are considered. The review concludes with a comprehensive assessment of the current potential of microalgal biotechnology for ensuring the sustainable usage of phosphorus.

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Section: Cultivation Conditions and P Nutrition History Of The Culturementioning

confidence: 99%

Section: Microalgal Biomass Is An Efficient and Environtally Friendly...mentioning

confidence: 99%

Getting Grip on Phosphorus: Potential of Microalgae as a Vehicle for Sustainable Usage of This Macronutrient

Solovchenko,

Plouviez,

Khozin-Goldberg

2024

Preprint

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“…An alternative is to replace these chemicals with biological substances 3 . Biofertilizers and plant growth promoters, for example, are promising components that may increase the growth and development of plant crops and consequently promote higher agricultural yields 4 …”

Section: Introductionmentioning

confidence: 99%

“…3 Biofertilizers and plant growth promoters, for example, are promising components that may increase the growth and development of plant crops and consequently promote higher agricultural yields. 4 Microalgal extracts can promote plant growth, which may be related to the direct or indirect effect of phytohormones present in such extracts. [5][6][7] Auxins and cytokinins are the main phytohormones studied so far.…”

Section: Introductionmentioning

confidence: 99%

Identification of the phytohormones indole‐3‐acetic acid and trans‐zeatin in microalgae

Cruz

Rosa

Costa

2023

J of Chemical Tech & Biotech

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BACKGROUND: Microalgae can biosynthesize phytohormones that promote plant growth and development. These compounds can potentially replace synthetic agricultural inputs that are harmful to the environment. The main plant growth-promoting phytohormones present in microalgae are auxins and cytokinins. The objective of this study was to evaluate the influence of culture conditions (autotrophic and heterotrophic) on the concentrations of the endogenous phytohormones indole-3-acetic acid (IAA) and trans-zeatin (tZ) in the microalgae Chlorella fusca LEB 111, Chlorella vulgaris LEB 112, Scenedesmus obliquus LEB 117, Synechococcus nidulans LEB 115 and Spirulina sp. LEB 18.RESULTS: All microalgae produced IAA and tZ under the three evaluated conditions (autotrophic light/dark (12/12 h), autotrophic continuous light (24 h) and heterotrophic). The IAA concentrations ranged from 1.94 to 56.45 nmol g −1 , whereas those of tZ ranged from 0.06 to 35.52 pmol g −1 . The cultivation conditions increased the carbohydrate and protein concentrations. Continuous light favored the production of carbohydrates in the studied cyanobacteria (Synechococcus nidulans LEB 115 and Spirulina sp. LEB 18). However, the light/dark condition (12/12 h) afforded the highest protein concentrations for green algae and cyanobacteria. There were no statistically significant differences in the lipid content of the strains studied. CONCLUSIONS:The results of this study are valuable and indicate that the cultivation conditions and species used in this study may be applied in sustainable agriculture, providing alternatives that may contribute to minimizing the environmental impact of synthetic chemical inputs in agriculture.

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“…Although most studies on legumes focus on their interaction with plant-growth-promoting rhizobacteria (PGPR), a few studies evaluate the effect of seaweed and MA biostimulants on these plants including Phaseolus vulgaris [7,30], Vigna radiata [6,31,32], Glycine max [33,34] and Medicago sativa [35][36][37]. In plant biostimulant studies, MA were administered to plants in the form of extracts [32,[38][39][40], dry biomass [41][42][43][44][45], spent medium/supernatant [46,47], whole cultures [46] as well as cell suspensions [47,48], and desirable results were achieved. Application of the same MA strain's dry biomass, liquid fertilizer and foliar application all led to positive results, although foliar application had greater effects [49].…”

Section: Introductionmentioning

confidence: 99%

Strain-Specific Biostimulant Effects of Chlorella and Chlamydomonas Green Microalgae on Medicago truncatula

Gitau

Farkas

Balla

et al. 2021

Plants

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Microalgae have been identified to produce a plethora of bioactive compounds exerting growth stimulating effects on plants. The objective of this study was to investigate the plant-growth-promoting effects of three selected strains of eukaryotic green microalgae. The biostimulatory effects of two Chlorella species (MACC-360 and MACC-38) and a Chlamydomonas reinhardtii strain (cc124) were investigated in a Medicago truncatula model plant grown under controlled greenhouse conditions. The physiological responses of the M. truncatula A17 ecotype to algal biomass addition were characterized thoroughly. The plants were cultivated in pots containing a mixture of vermiculite and soil (1:3) layered with clay at the bottom. The application of live algae cells using the soil drench method significantly increased the plants’ shoot length, leaf size, fresh weight, number of flowers and pigment content. For most of the parameters analyzed, the effects of treatment proved to be specific for the applied algae strains. Overall, Chlorella application led to more robust plants with increased fresh biomass, bigger leaves and more flowers/pods compared to the control and Chlamydomonas-treated samples receiving identical total nutrients.

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Algal biomass from wastewater: soil phosphorus bioavailability and plants productivity

Cited by 37 publications

References 22 publications

Getting Grip on Phosphorus: Potential of Microalgae as a Vehicle for Sustainable Usage of This Macronutrient

Getting Grip on Phosphorus: Potential of Microalgae as a Vehicle for Sustainable Usage of This Macronutrient

Identification of the phytohormones indole‐3‐acetic acid and trans‐zeatin in microalgae

Strain-Specific Biostimulant Effects of Chlorella and Chlamydomonas Green Microalgae on Medicago truncatula

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