The effects of combined agricultural phytohormones on the growth, carbon partitioning and cell morphology of two screened algae

Yu, Ze; Song, Mingming; Pei, Haiyan; Jiang, Liqun; Hou, Qingjie; Nie, Changliang; Zhang, Lijie

doi:10.1016/j.biortech.2017.04.120

Cited by 82 publications

(19 citation statements)

References 42 publications

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“…Significant increases in algal growth and in the levels of biochemical parameters, including chlorophylls, proteins, and monosaccharides were found with the combined treatments of brassinolide (BL) + IAA [47] and BL + trans-zeatin [48]. Similar to this, combined phytohormones have been observed to stimulate biomass and lipid yields of two freshwater microalgae, implying that proton pumps and an anti-oxidative mechanism were activated by the stimulants [49,102].…”

Section: The Crosstalk For Different Phytohormonessupporting

confidence: 58%

Phytohormones and Effects on Growth and Metabolites of Microalgae: A Review

et al. 2018

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Microalgae cultivation is booming in agriculture, aquaculture, and bioenergy sectors. A wide range of bioactive compounds with attractive properties can be produced with microalgae, including pigments, vitamins, proteins, carbohydrates, and lipids. The biofuel yields from microalgae can exceed the yields obtained with energy crops by 10-100 times. Therefore, such cultivation is promising for the regulation of the biosynthesis of microalagae with phytohormones, which can enhance the production of high-valued bioproducts. This review reports the effect of auxins, abscisic acid, cytokinins, gibberellins, and ethylene on microalgal growth and metabolites, as well as the crosstalk of different phytohormones. The use of phytohormones is also promising because it can also reduce the inputs necessary to grow the selected microalgae and maximize the yields.

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Section: The Crosstalk For Different Phytohormonessupporting

confidence: 58%

Phytohormones and Effects on Growth and Metabolites of Microalgae: A Review

et al. 2018

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“…In addition to genes involved in the synthesis of vitamins, genes attributable to the production of plant hormones were found in the genomes of the utilized model strains. Several studies have demonstrated that phytohormones can stimulate the growth and lipid production of microalgae (de-Bashan et al, 2008;Amin et al, 2015;Liu et al, 2016;Yu et al, 2017). Additionally, both genomes contained a substantial higher number of genes involved in iron acquisition and metabolism than genomes of other plant-associated methylobacteria that were implemented as a reference.…”

Section: Discussionmentioning

confidence: 99%

Plant Growth-Promoting Methylobacteria Selectively Increase the Biomass of Biotechnologically Relevant Microalgae

et al. 2020

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Microalgae, a diverse group of single-celled organisms exhibiting versatile traits, find broad applications in industry. However, high production costs require further efforts to optimize their production and to enhance biomass yields. In the present study, co-occurrence of algae and methylobacteria was observed when naturally occurring microalgae biofilms were subjected to 16S rRNA gene fragment amplicon sequencing. This bacterial group is so far less explored than other microalgae-associated bacteria in terms of mutualistic relationships that might be exploitable for biotechnological applications. In order to assess the potential of four plant growth-promoting strains from the genus Methylobacterium for increased algae biomass production, co-cultivation experiments were conducted with three industrially relevant microalgae (Chlorella vulgaris, Scenedesmus vacuolatus, and Haematococcus lacustris). For S. vacuolatus and H. lacustris, a significant increase in algal biomass formation of 1.3-fold to up to 14fold was observed after 7 days of co-incubation. Visualization of mixed cultures using confocal laser scanning microscopy revealed a high abundance of methylobacteria in the phycosphere of H. lacustris and S. vacuolatus, visually attached to the algae's surface forming a biofilm-like assemblage. Genome analyses revealed that features attributable to enhanced algal growth include genes involved in the synthesis of vitamins, siderophores and plant hormones. Our results provide evidence for the constructability of novel symbiotic algae-bacteria relationships with inter-kingdom supportive capacities, underlining the potential of microbial consortia as promising tool for sustainable biotechnology and agriculture.

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“…Li et al [22] reported that the lipid productivity of Scenedesmus LX1 was 11.6 mg L −1 day −1 when the nitrogen content in the medium was 10 mg L −1 . Yu et al [25] noted a lipid productivity of 11.9 mg L −1 day −1 when 5 mg L −1 auxin was added to the BG-11 medium when undergoing the two-step cultivation method. Compared to the data in Table 1, it can be suggested that multiple small-doses of nitrogen can increase lipid productivity.…”

Section: Lipid Content Production and Productivitymentioning

confidence: 99%

Effects of Nitrogen Forms and Supply Mode on Lipid Production of Microalga Scenedesmus obliquus

Zhao

Chen

et al. 2020

Energies

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Optimization of the microalgae culture conditions could significantly reduce the production costs of microalgae-derived biodiesel. In the current study, a new process of adding different forms using the multiple small-dose method was employed. The effects of different forms of nitrogen (NaNO3, NH4Cl, and CH4N2O) and their concentrations (0.1, 0.5, 1, and 2 mg L−1) on the growth and lipid production of Scenedesmus obliquus were studied. Algae density and lipid production increased with increasing nitrogen concentration for all different forms of nitrogen except NH4Cl. The Scenedesmus obliquus growth was promoted by adding NaNO3 and CH4N2O, but was inhibited by adding NH4Cl. Adding 2 mg N L−1 of CH4N2O daily yielded the highest cell density (1.7 × 107 cells mL−1) and lipid production (242.4 mg L−1). These conditions can thus maintain the biomass of Scenedesmus obliquus, increase its lipid accumulation, and decrease the costs of biodiesel production.

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The effects of combined agricultural phytohormones on the growth, carbon partitioning and cell morphology of two screened algae

Cited by 82 publications

References 42 publications

Phytohormones and Effects on Growth and Metabolites of Microalgae: A Review

Phytohormones and Effects on Growth and Metabolites of Microalgae: A Review

Plant Growth-Promoting Methylobacteria Selectively Increase the Biomass of Biotechnologically Relevant Microalgae

Effects of Nitrogen Forms and Supply Mode on Lipid Production of Microalga Scenedesmus obliquus

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