Associated bacteria of <i>Botryococcus braunii</i> (Chlorophyta)

Gouveia, João D.; Lian, Jie; Steinert, Georg; Smidt, Hauke; Sipkema, Detmer; Wijffels, René H.; Barbosa, María J.

doi:10.7717/peerj.6610

Cited by 10 publications

(7 citation statements)

References 72 publications

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“…The development of processes to remove associated bacteria from microalgal cultures and maintain bacteria-free cultures in large-scale production has been attempted (Wang et al, 2016). However, it is deemed impractical and unsustainable because in most cases, bacteria are introduced into microalgae cultivation systems through algae stocks used as starter cultures, which are often not axenic (Gouveia et al, 2019).…”

Section: Microalgae-bacteria Interactionsmentioning

confidence: 99%

Microalgae based wastewater treatment coupled to the production of high value agricultural products: Current needs and challenges

et al. 2022

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Section: Microalgae-bacteria Interactionsmentioning

confidence: 99%

Microalgae based wastewater treatment coupled to the production of high value agricultural products: Current needs and challenges

et al. 2022

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“…Symbiotic bacteria have been reported after microscopic observations, and an ectosymbiont α-proteobacteria (BOTRYCO-2) that promotes the productivity of biomass and hydrocarbons was described [2,27].…”

Section: Physiology and Biochemistry Of Botryococcus Brauniimentioning

confidence: 99%

The Colonial Microalgae Botryococcus braunii as Biorefinery

Lozoya‐Gloria¹,

Cruz²,

Ozawa-Uyeda³

2020

Microalgae - From Physiology to Application

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The growing shortage of fossil fuels caused an increase in the demand for alternative and renewable fuels. Biofuels, like bioethanol and biodiesel, have received more attention as a sustainable replacement of fossil fuels. However, these have a poor oxidative stability, little energy content by volume, and many oxygenated compounds, which may cause corrosion and damage to the engines. Therefore, they are used as a mixture with standard fuels. Some species of microalgae are candidates to produce oils as triglycerides (TGA) to produce biodiesel by transesterification; however, the problem will remain. The colonial microalgae Botryococcus braunii produces and accumulates a high amount of long-chain nonoxygenated hydrocarbons, similar to those obtained from the fractionated distillation of crude petroleum. This is one of the few organisms reported to have a direct contribution in the formation of the oil reserves currently in use. Additionally, B. braunii produces pigments and long-chain carbohydrates that have interesting properties for various industries. There are still problems to be solved in order to consider it as economically viable and profitable, but important progress is being made. Therefore, this microalga is very attractive for the synthesis of hydrocarbons and other value-added compounds, making it an interesting biorefinery organism.

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“…Algal cultures are axenic in only a few applications, whereas all microalgae mass production systems inevitably contain a number of non-target organisms (contaminants), including bacteria (Zittelli et al, 2013;Newby et al, 2016). Bacteria are introduced in algae cultivation systems as algae stocks used as starter cultures are often not axenic (Biondi et al, 2017;Biondi et al, 2018;Gouveia et al, 2019). On the other hand, bacterial contaminants may enter cultivation systems through multiple operation processes, such as the supplementation of unsterilized medium or simply as airborne invaders in open algal cultures.…”

Section: Introductionmentioning

confidence: 99%

Different co‐occurring bacteria enhance or decrease the growth of the microalga Nannochloropsis sp. CCAP211/78

Lian

Schimmel

Sanchez-Garcia

et al. 2021

Microbial Biotechnology

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Marine photosynthetic microalgae are ubiquitously associated with bacteria in nature. However, the influence of these bacteria on algal cultures in bioreactors is still largely unknown. In this study, eighteen different bacterial strains were isolated from cultures of Nannochloropsis sp. CCAP211/78 in two outdoor pilot-scale tubular photobioreactors. The majority of isolates was affiliated with the classes Alphaproteobacteria and Flavobacteriia. To assess the impact of the eighteen strains on the growth of Nannochloropsis sp. CCAP211/78, 24-well plates coupled with custom-made LED boxes were used to simultaneously compare replicate axenic microalgal cultures with addition of individual bacterial isolates. Co-culturing of Nannochloropsis sp. CCAP211/78 with these strains demonstrated distinct responses, which shows that the technique we developed is an efficient method for screening the influence of harmful/beneficial bacteria. Two of the tested strains, namely a strain of Maritalea porphyrae (DMSP31) and a Labrenzia aggregata strain (YP26), significantly enhanced microalgal growth with a 14% and 12% increase of the chlorophyll concentration, respectively, whereas flavobacterial strain YP206 greatly inhibited the growth of the microalga with 28% reduction of the chlorophyll concentration. Our study suggests that algal production systems represent a 'natural' source to isolate and study microorganisms that can either benefit or harm algal cultures.

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Associated bacteria of Botryococcus braunii (Chlorophyta)

Cited by 10 publications

References 72 publications

Microalgae based wastewater treatment coupled to the production of high value agricultural products: Current needs and challenges

Microalgae based wastewater treatment coupled to the production of high value agricultural products: Current needs and challenges

The Colonial Microalgae Botryococcus braunii as Biorefinery

Different co‐occurring bacteria enhance or decrease the growth of the microalga Nannochloropsis sp. CCAP211/78

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