The possible role of bacterial signal molecules N-acyl homoserine lactones in the formation of diatom-biofilm ( Cylindrotheca sp.)

Yang, Cuiyun; Fang, Shengtao; Chen, Dehui; Wang, Jianhua; Liu, Fanghua; Chen, Xia

doi:10.1016/j.marpolbul.2016.04.010

Cited by 33 publications

(24 citation statements)

References 36 publications

(40 reference statements)

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“…This species is deeply studied for its extracellular polymeric substances, its adhesion mechanisms and its relationships with bacteria [ 36 , 37 , 38 ]. It is able to form mixed biofilm with bacterial strains and a possible role of bacterial signal molecules AHL in the formation of its biofilm has been indicated [ 39 , 40 , 41 ].…”

Section: Resultsmentioning

confidence: 99%

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Anti-Biofilm Effect of Biodegradable Coatings Based on Hemibastadin Derivative in Marine Environment

Norcy

Niemann

Proksch

et al. 2017

IJMS

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Dibromohemibastadin-1 (DBHB) is an already known potent inhibitor of blue mussel phenoloxidase (which is a key enzyme involved in bioadhesion). Within this study, the potentiality of DBHB against microfouling has been investigated. The activity of DBHB was evaluated on key strains of bacteria and microalgae involved in marine biofilm formation and bioassays assessing impact on growth, adhesion and biofilm formation were used. To assess the efficiency of DBHB when included in a matrix, DBHB varnish was prepared and the anti-microfouling activity of coatings was assessed. Both in vitro and in situ immersions were carried out. Confocal Laser Scanning Microscopy (CLSM) was principally used to determine the biovolume and average thickness of biofilms developed on the coatings. Results showed an evident efficiency of DBHB as compound and varnish to reduce the biofilm development. The mode of action seems to be based principally on a perturbation of biofilm formation rather than on a biocidal activity in the tested conditions.

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Section: Resultsmentioning

confidence: 99%

“…It was reported that Ca 2+ might be involved in the mobility, attachment and growth of diatoms [ 43 ]. Moreover, a recent study has shown the effect of QS inhibitors on the growth and the diatom biofilm formation [ 40 , 41 ]. Thus, several mechanisms could explain the impact of DBHB on diatoms biofilm formation.…”

Section: Resultsmentioning

confidence: 99%

Anti-Biofilm Effect of Biodegradable Coatings Based on Hemibastadin Derivative in Marine Environment

Norcy

Niemann

Proksch

et al. 2017

IJMS

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“…An indirect effect of insecticides on diatom assemblages has also been demonstrated through the inhibition of bacterial signaling molecules in studies conducted on biofouling mechanisms 55 . Quorum-sensing signals originating specifically in gram-negative bacteria were involved in the alteration of the diatom-biofilm relationship, accompanied with changes in chlorophyll a and EPS content 56 . When seeking variations in diatomic taxonomic assemblages in situ, our results have shown that the heterogeneity of communities is such that the data is not suitable to serve as a contamination indicator.…”

Section: Discussionmentioning

confidence: 99%

Physical properties of epilithic river biofilm as a new lead to perform pollution bioassessments in overseas territories

Monti¹,

Hubas²,

Lourenço³

et al. 2020

Sci Rep

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Chlordecone (CLD) levels measured in the rivers of the French West Indies were among the highest values detected worldwide in freshwater ecosystems, and its contamination is recognised as a severe health, environmental, agricultural, economic, and social issue. In these tropical volcanic islands, rivers show strong originalities as simplified food webs, or numerous amphidromous migrating species, making the bioindication of contaminations a difficult issue. The objective of this study was to search for biological responses to CLD pollution in a spatially fixed and long-lasting component of the rivers in the West Indies: the epilithic biofilm. Physical properties were investigated through complementary analyses: friction, viscosity as well as surface adhesion were analyzed and coupled with measures of biofilm carbon content and exopolymeric substance (EPS) production. Our results have pointed out a mesoscale chemical and physical reactivity of the biofilm that can be correlated with CLD contamination. We were able to demonstrate that epilithic biofilm physical properties can effectively be used to infer freshwater environmental quality of French Antilles rivers. The friction coefficient is reactive to contamination and well correlated to carbon content and EPS production. Monitoring biofilm physical properties could offer many advantages to potential users in terms of effectiveness and ease of use, rather than more complex or time-consuming analyses.

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“…It was already shown that bacterial signal molecules such as AHL are involved in relationships between bacteria and other organisms, inlcuding microalgae [ 70 ] and macroorganisms ( Ulva spores, Balanus cyprids) [ 71 ]. Targeting the bacterial communication system is an interesting strategy to inhibit, first, the microfouling by disruption of bacteria and diatom biofilms and, second, the macrofouling by the reduction of macrofoulers attachment.…”

Section: Discussionmentioning

confidence: 99%

Sponge-Inspired Dibromohemibastadin Prevents and Disrupts Bacterial Biofilms without Toxicity

et al. 2017

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Since the banning of several families of compounds in antifouling (AF) coatings, the search for environmentally friendly AF compounds has intensified. Natural sources of AF compounds have been identified in marine organisms and can be used to create analogues in laboratory. In a previous study, we identified that dibromohemibastadin-1 (DBHB) is a promising AF molecule, leading to the inhibition of the activity of phenoloxidase, an enzyme involved in the attachment of mussels to surfaces. This paper describes the activity of the DBHB on biofilm formation and its detachment and on bacterial adhesion and communication: quorum sensing. DBHB has an anti-biofilm activity without affecting adhesion of marine and terrestrial bacteria at a dose of 10 µM. Moreover, DBHB activity on quorum sensing (QS) is demonstrated at doses of 8 and 16 µM. The activity of DBHB on QS is compared to kojic acid, a quorum sensing inhibitor already described. This compound is a promising environmentally friendly molecule potentially useful for the inhibition of microfouling.

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The possible role of bacterial signal molecules N-acyl homoserine lactones in the formation of diatom-biofilm ( Cylindrotheca sp.)

Cited by 33 publications

References 36 publications

Anti-Biofilm Effect of Biodegradable Coatings Based on Hemibastadin Derivative in Marine Environment

Anti-Biofilm Effect of Biodegradable Coatings Based on Hemibastadin Derivative in Marine Environment

Physical properties of epilithic river biofilm as a new lead to perform pollution bioassessments in overseas territories

Sponge-Inspired Dibromohemibastadin Prevents and Disrupts Bacterial Biofilms without Toxicity

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