The effect of steroid hormones on pseudomonas virulence, persistence and signaling by Yong, Valerie Fei Lee

“…The mechanism by which this phenomenon occurs is through the molecular signalling pathway of the muc operon known to modulate bacterial cell envelope stress response, virulence production, and planktonic or sessile mode of growth. Sex steroid hormones act like environmental stressors onto the P. aeruginosa membrane, triggering P. aeruginosa to adapt for its survival through the production of outer membrane vesicles (OMVs), altered biofilm architecture, secreted factors, and altered surface motility. …”
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Draft genome sequence of marine alphaproteobacterial strain HIMB11, the first cultivated representative of a unique lineage within the Roseobacter clade possessing an unusually sma... by Durham, Bryndan P., Grote, Jana, Whittaker, Kerry A., Bender, Sara J., Luo, Haiwei, Grim, Sharon L., Brown, Julia M., Casey, John R., Dron, Antony, Florez-Leiva, Lennin, Krupke, Andreas, Luria, Catherine M., Mine, Aric H., Nigro, Olivia D., Pather, Santhiska, Talarmin, Agathe, Wear, Emma K., Weber, Thomas S., Wilson, Jesse M., Church, Matthew J., Karl, David M., Steward, Grieg F., Eppley, John M., Kyrpides, Nikos C., Schuster, Stephan, Rappé, Michael S., DeLong, Edward Francis

“…Strain HIMB11 is a planktonic marine bacterium isolated from coastal seawater in Kaneohe Bay, Oahu, Hawaii belonging to the ubiquitous and versatile Roseobacter clade of the alphaproteobacterial family Rhodobacteraceae. …”
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Population dynamics and transcriptomic responses of Pseudomonas aeruginosa in a complex laboratory microbial community by Cheng, Yingying, Yam, Joey Kuok Hoong, Cai, Zhao, Ding, Yichen, Zhang, Lian-Hui, Deng, Yinyue, Yang, Liang

“…To understand P. aeruginosa’s physiology and interactions with co-existing bacterial species in different conditions, we established physiologically reproducible 18 species communities, and found that P. aeruginosa dominated in mixed-species biofilm communities but not in planktonic communities. P. aeruginosa’s H1 type VI secretion system was highly induced in mixed-species biofilm consortia, compared with its monospecies biofilm, which was further demonstrated to play a key role in P. aeruginosa's enhanced fitness over other bacterial species. …”
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Rapid microevolution of biofilm cells in response to antibiotics by Penesyan, Anahit, Nagy, Stephanie S., Kjelleberg, Staffan, Gillings, Michael R., Paulsen, Ian T.

“…Biofilms represent the predominant mode of microbial life, but research into antibiotic resistance has mainly focused on planktonic cells. We investigated the dynamics of A. baumannii biofilms in the presence of antibiotics. …”
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In vitro and in vivo generation and characterization of Pseudomonas aeruginosa biofilm–dispersed cells via c-di-GMP manipulation by Chua, Song Lin, Hultqvist, Louise D., Yuan, Mingjun, Rybtke, Morten, Nielsen, Thomas E., Givskov, Michael, Tolker-Nielsen, Tim, Yang, Liang

“…However, freshly dispersed biofilm cells exhibit a physiology distinct from biofilm and planktonic cells, and they might have a clinically relevant role in infections. …”
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New insights into transparent exopolymer particles (TEP) formation from precursor materials at various Na+/Ca2+ ratios by Meng, Shujuan, Liu, Yu

“…Transparent exopolymer particles (TEP) are planktonic, organic microgels which play significant roles in cycling of carbon and trace elements, aggregation of particles, feeding and accommodating microbes as well as development of biofilms. …”
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Proteinase, phospholipase, biofilm forming abilities and antifungal susceptibilities of Malaysian Candida isolates from blood cultures by Tay, Sun Tee, Abidin, Ira Azzura Zainal, Hassan, Hamimah, Ng, Kee Peng

“…In addition, the findings of this study demonstrate increased resistance of Candida isolates in biofilms to amphotericin and fluconazole, as compared to their planktonic counterparts.…”
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Assessing the transcriptional responses of E. coli in co-culture with K. pneumoniae and E. faecalis in relation to quorum sensing and entrance into viable but nonculturable state by Ranjani Nadarajan

“…The study evaluated the transcriptional responses of these genes in two culture conditions in both the planktonic and biofilm mode of growth. Further investigations were performed to evaluate if the influences exerted by the non- E. coli species were dependent on physical presence of the partner species or their secreted factors. …”
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Attacking stressed klebsiella pneumonia biofilm with Wi-Fi by Tay, Mavis Si Min

“…The results from the optical density of both Wi-F and controlled, and, for planktonic cells and biofilms, varies in the same way respectively for the same amount of Magnesium. …”
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Bioprospecting of medicinal plants showing antibacterial activity against Pseudomonas aeruginosa by Lim, Vernice Wen Min

“…Therefore in this study, we aim to evaluate the antibacterial activity of local herbal plants against both the planktonic cells and biofilms of Pseudomonas aeruginosa PAO1 Wild-Type strain through microtiter plate assays. …”
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Oceanic Cd/P ratio and nutrient utilization in the glacial Southern Ocean by Elderfield, H, Rickaby, R

“…This allows the reconstruction of past surface water phosphate concentrations from the cadmium/calcium ratio of planktonic foraminifera. Results from the Last Glacial Maximum show similar phosphate utilization in the subantarctic to that of today, but much smaller utilization in the polar Southern Ocean, in a model that is consistent with the expansion of glacial sea ice and which can reconcile all proxy records of polar nutrient utilization. …”

Interspecies interactions and biofilm development in a three-species biofilm model by Goh, Yu Fen

“…The genes had no role on the utilisation of different substrates and planktonic metabolism of P. protegens. However, the species composition of the mixed community shifted when the mutants were grown in the community, either as planktonic cells or a biofilm. …”
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The application of nanomaterials for the delivery of natural antimicrobials in engineered systems by Chan, A

“…Herein, antimicrobial efficacies of five plant-derived compounds were assessed against various species of planktonic bacteria as well as biofilms at various maturity stages. …”

Secular variation in Late Cretaceous carbon isotopes: a new δ13C carbonate reference curve for the Cenomanian-Campanian (99.6 - 70.6 Ma) by Jarvis, I, Gale, A, Jenkyns, H, Pearce, M

“…Correlation with pelagic sections at Gubbio, central Italy, demonstrates general agreement between biostratigraphic and chemostratigraphic criteria in the Cenomanian-Turonian stages, confirming established relationships between Tethyan planktonic foraminiferal and Boreal macrofossil biozonations. …”

Secular variation in Late Cretaceous carbon isotopes: a new delta C-13 carbonate reference curve for the Cenomanian-Campanian (99.6-70.6 Ma) by Jarvis, I, Gale, A, Jenkyns, H, Pearce, M

“…Correlation with pelagic sections at Gubbio, central Italy, demonstrates general agreement between biostratigraphic and chemostratigraphic criteria in the Cenomanian-Turonian stages, confirming established relationships between Tethyan planktonic foraminiferal and Boreal macrofossil biozonations. …”

Hierarchical structural design for fracture resistance in the shell of the pteropod Clio pyramidata by Li, Ling, Weaver, James C., Ortiz, Christine

“…The thecosomes are a group of planktonic pteropods with thin, 1 mm-sized aragonitic shells, which are known to possess a unique helical microstructure consisting of interlocking nanofibres. …”
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Contact-Dependent Killing by Caulobacter Crescentus via Cell Surface-Associated, Glycine Zipper Proteins by Garcia Bayona, Leonor, Guo, Monica S, Laub, Michael T

“…However, bacteriocins are typically freely diffusible, and so of little value to planktonic cells in aqueous environments. Here, we identify an atypical two-protein bacteriocin in the α-proteobacterium Caulobacter crescentus that is retained on the surface of producer cells where it mediates cell contact-dependent killing. …”
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Inactivation of the pgmA gene in Streptococcus mutans significantly decreases biofilm-associated antimicrobial tolerance by Nilsson, Martin, Givskov, Michael, Twetman, Svante, Tolker-Nielsen, Tim

“…On the contrary, the resistance of planktonic S. mutanspgmA cells to gentamycin, linezolid, and vancomycin was more similar to wild-type levels. …”
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Antimicrobial enhancement via Cerium (II)/Lanthanum (III)‐doped TiO₂ for emergency leak sealing polyurea coating system by Li, Yuanzhe, Fang, Cong, Zhuang, Wei-Qin, Wang, Haojing, Wang, Xueli

“…Due to the adsorption by the Ce/La-doped TiO2 and generation of reactive oxygen species (ROS), E. coli and Pseudomonas may lose their living conditions during the progress, and planktonic bacteria cells are prevented from enriching on the surface. …”
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Dispersal from microbial biofilms by Barraud, Nicolas, Kjelleberg, Staffan, Rice, Scott A.

“…Dispersal cells appear to be specialized and exhibit a unique phenotype different from biofilm or planktonic bacteria. Further, the dispersal population is characterized by a high level of heterogeneity, reminiscent of, but distinct from, that in the biofilm, which could potentially allow for improved colonization under various environmental conditions. …”
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