Isolation and selection of microalgae capable of stimulating rice plant development and seed production

Lamb, Thainá Inês; Berghahn, Emilio; Pita, Fernanda Miyagi; de Oliveira Neves, Leonardo; dos Reis Blasi, Édina Aparecida; Hofstetter, Jamili Seibel; Dammann, Mariana; da Silva, Luiz Carlos Oliveira; Buffon, Giseli; Dullius, Anja; Granada, Camille Eichelberger; Sperotto, Raul Antonio

doi:10.1016/j.algal.2023.103203

Cited by 2 publications

(1 citation statement)

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“…Previous studies examined biostimulant activity resulting from biomass suspension and aqueous extract of Desmodesmus [31], from Desmodesmus cells (culture centrifuged and washed twice with sterile distilled water) [32], and from Desmodesmus sp. extracts prepared with cells lysed in distilled water [52]. To the best of our knowledge, this is the first report using a biocatalysis process with Desmodesmus sp., which is suggested as a novel and sustainable way to produce biostimulants at an industrial scale.…”

Section: Optimization Of a Biocatalysis Processmentioning

confidence: 91%

Revolutionizing Agriculture: Leveraging Hydroponic Greenhouse Wastewater for Sustainable Microalgae-Based Biostimulant Production

Álvarez-Gil,

Blanco-Vieites,

Suárez-Montes

et al. 2023

Sustainability

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The current intensification in agricultural pressure has resulted in the addition of excessive amounts of nutrients. While hydroponic systems have become an agricultural tool to reduce this nutrient addition, the produced nutrient-rich drainage solution, which has a negative effect in water bodies, is still a barrier that needs to be overcome. A promising alternative for nutrient recovery is the cultivation of microalgae, which require a significant quantity of nutrients for their growth. Furthermore, their biostimulant properties enhance the circularity and sustainability approach. This study evaluates microalgae growth with a hydroponic drainage solution and the use of the resulting biomass as a source for biostimulant. Three microalgae strains were tested (Desmodesmus sp., Chlorella vulgaris, and Scenedesmus obliquus) and grown at laboratory scale (0.5 and 2 L) with drainage wastewater taken from hydroponic tomato crops. Measures of OD750 and OD680 revealed Desmodesmus sp. as the strain with the best performance, achieving 1.4 and 1.8, respectively, in the 0.5 L assay and 1.08 and 1.3 in the 2 L assay. These results were confirmed in another assay that compared Desmodesmus sp. growth in drainage wastewater and in control media. Then, Desmodesmus sp. was tested at industrial scale. Results show the columnar PBR reached 1.8 g·L−1 compared to 1.1 g·L−1 achieved with raceways. Finally, the resulting biomass was tested in a biocatalysis process for biostimulant production, suggesting an innovative system to use microalgae biomass cultured in wastewater as a valuable product such as biostimulant.

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Section: Optimization Of a Biocatalysis Processmentioning

confidence: 91%