Interactions between Diatoms and Bacteria

Amin, Shady A.; Parker, Micaela S.; Armbrust, E. Virginia

doi:10.1128/mmbr.00007-12

Cited by 819 publications

(800 citation statements)

References 198 publications

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“…Among the many ways in which bacteria can positively influence algal growth, one of the most commonly reported is the production of vitamins for which the alga is auxotrophic, especially vitamin B 12 (Croft et al ., 2005; Amin et al ., 2012). T. suecica F&M‐M33 did not seem to be affected by the lack of vitamins, as the axenic culture grew as biomass (up to concentrations of 1.8 g l −1 ) and cell number in the same way in both vitamin‐supplemented and non‐supplemented media.…”

Section: Discussionmentioning

confidence: 99%

Tetraselmis suecica F&M‐M33 growth is influenced by its associated bacteria

Biondi

Cheloni

Rodolfi

et al. 2017

Microbial Biotechnology

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SummaryAlgal cultures are usually co‐cultures of algae and bacteria, especially when considering outdoor mass cultivation. The influence of associated bacteria on algal culture performance has been poorly investigated, although bacteria may strongly affect biomass (or derived product) yield and quality. In this work, the influence on growth and productivity of Tetraselmis suecica F&M‐M33 of bacterial communities and single bacterial isolates from the algal phycosphere was investigated. Xenic laboratory and outdoor cultures were compared with an axenic culture in batch. The presence of the bacterial community significantly promoted culture growth. Single bacterial isolates previously found to be strictly associated with T. suecica F&M‐M33 also increased growth compared with the axenic culture, whereas loosely associated and common seawater bacteria induced variable growth responses, from positive to detrimental. The increased growth was mainly evidenced as increased algal biomass production and cell size, and occurred after exhaustion of nutrients. This finding is of interest for biofuel production from microalgae, often attained through nutrient starvation processes leading to oil or carbohydrate accumulation. As axenic T. suecica F&M‐M33 showed a similar growth with or without vitamins, the most probable mechanism behind bacterial positive influence on algal growth seems nutrient recycling.

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Section: Discussionmentioning

confidence: 99%

Tetraselmis suecica F&M‐M33 growth is influenced by its associated bacteria

Biondi

Cheloni

Rodolfi

et al. 2017

Microbial Biotechnology

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“…Competition for nutrients and spaces has been observed in many nutrient-limiting environments Rier and Stevenson 2002;Scott et al 2008), but may not be the case in wastewater. Algae can raise water pH, increase dissolved oxygen content during photosynthesis, and release inhibitory chemicals, which can be detrimental to certain bacteria, while bacteria can in turn affect algae by killing or lysing or by changing the microenvironment (Amin et al 2012;Subashchandrabose et al 2011;Wang et al 2016a). However, how microbial interactions affect the overall biodegradation ability of the consortia remains poorly understood.…”

Section: Biodegradationmentioning

confidence: 99%

Removal of pharmaceuticals and personal care products from wastewater using algae-based technologies: a review

Wang

Liu

et al. 2017

Rev Environ Sci Biotechnol

147

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Pharmaceuticals and personal care products (PPCPs) consist of a variety of compounds extensively used for the treatment of human and animal diseases and for health or cosmetic reasons. PPCPs are considered as emerging environmental contaminants due to their ubiquitous presence in the environment and high environmental risks. In wastewater treatment plants using conventional activated sludge processes, many PPCPs cannot be efficiently removed. Therefore, there is an increasing need for more effective and cost-efficiency ways of removing PPCPs while treating wastewater. Algae-based technologies have recently attracted growing attentions for their potential application in wastewater treatment and hazardous contaminant removal, which are advantages in reducing operation cost while generating valuable products and sequestrating greenhouse gases at the same time. This work reviews the up-to date researches to reveal potential toxic effects of PPCPs on algae and algae-bacteria consortia, identify mechanisms involved in PPCP removal, and assess the fate of PPCPs in algae-based treatment systems. Current researches suggest that algae and algae-bacteria consortia have great potentials in PPCP removal but more works are required before algae-based technologies can be implemented in large scales. Knowledge gaps are identified and further research focuses are proposed in this review.

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“…Experimental evidence suggests the existence of strong positive and negative interactions between photoautotrophic and heterotrophic microorganisms (Caldwell and Caldwell, 1978;Cole, 1982;Carpenter and Foster, 2002;Amin et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Inference of interactions in cyanobacterial–heterotrophic co-cultures via transcriptome sequencing

et al. 2014

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We used deep sequencing technology to identify transcriptional adaptation of the euryhaline unicellular cyanobacterium Synechococcus sp. PCC 7002 and the marine facultative aerobe Shewanella putrefaciens W3-18-1 to growth in a co-culture and infer the effect of carbon flux distributions on photoautotroph-heterotroph interactions. The overall transcriptome response of both organisms to co-cultivation was shaped by their respective physiologies and growth constraints. Carbon limitation resulted in the expansion of metabolic capacities, which was manifested through the transcriptional upregulation of transport and catabolic pathways. Although growth coupling occurred via lactate oxidation or secretion of photosynthetically fixed carbon, there was evidence of specific metabolic interactions between the two organisms. These hypothesized interactions were inferred from the excretion of specific amino acids (for example, alanine and methionine) by the cyanobacterium, which correlated with the downregulation of the corresponding biosynthetic machinery in Shewanella W3-18-1. In addition, the broad and consistent decrease of mRNA levels for many Fe-regulated Synechococcus 7002 genes during co-cultivation may indicate increased Fe availability as well as more facile and energy-efficient mechanisms for Fe acquisition by the cyanobacterium. Furthermore, evidence pointed at potentially novel interactions between oxygenic photoautotrophs and heterotrophs related to the oxidative stress response as transcriptional patterns suggested that Synechococcus 7002 rather than Shewanella W3-18-1 provided scavenging functions for reactive oxygen species under co-culture conditions. This study provides an initial insight into the complexity of photoautotrophic-heterotrophic interactions and brings new perspectives of their role in the robustness and stability of the association.

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Interactions between Diatoms and Bacteria

Cited by 819 publications

References 198 publications

Tetraselmis suecica F&M‐M33 growth is influenced by its associated bacteria

Tetraselmis suecica F&M‐M33 growth is influenced by its associated bacteria

Removal of pharmaceuticals and personal care products from wastewater using algae-based technologies: a review

Inference of interactions in cyanobacterial–heterotrophic co-cultures via transcriptome sequencing

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