Loktanella spp. Gb03 as an algicidal bacterium, isolated from the culture of Dinoflagellate Gambierdiscus belizeanus

Bloh, Anmar Hameed; Usup, Gires; Ali, Ahmad

doi:10.14202/vetworld.2016.142-146

Cited by 13 publications

(7 citation statements)

References 33 publications

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“…Kangiella, Hyphomonas, Puniceispirillum and Endoriftia were the best indicator genera for sediments <5.2 ka (subatlantic–subboreal period) with A > 0.75. Marine aerobic bacteria were also among the strong indicators for <5.2 ka of Category A, notably aerobic Loktanella (A = 0.695 and B = 1.000), known to be associated with the outbreak of algal blooms (Bloh, Usup, & Ahmad, ) as well as aerobic anoxygenic phototrophic bacteria such as Erythrobacter , Congregibacter and Dinoroseobacter . Other aerobic indicator taxa for sediments <5.2 ka in Category A involved Saccharophagus , Granulibacter , Maricaulis and Psychrobacter .…”

Section: Resultsmentioning

confidence: 99%

Holocene paleodepositional changes reflected in the sedimentary microbiome of the Black Sea

Giosan

Grice

et al. 2019

Geobiology

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Subsurface microbial communities are generally thought to be structured through in situ environmental conditions such as the availability of electron acceptors and donors and porosity, but recent studies suggest that the vertical distribution of a subset of subseafloor microbial taxa, which were present at the time of deposition, were selected by the paleodepositional environment. However, additional highly resolved temporal records of subsurface microbiomes and paired paleoenvironmental reconstructions are needed to justify this claim. Here, we performed a highly resolved shotgun metagenomics survey to study the taxonomic and functional diversity of the subsurface microbiome in Holocene sediments underlying the permanently stratified and anoxic Black Sea. Obligate aerobic bacteria made the largest contribution to the observed shifts in microbial communities associated with known Holocene climate stages and transitions. This suggests that the aerobic fraction of the subseafloor microbiome was seeded from the water column and did not undergo post‐depositional selection. In contrast, obligate and facultative anaerobic bacteria showed the most significant response to the establishment of modern‐day environmental conditions 5.2 ka ago that led to a major shift in planktonic communities and in the type of sequestered organic matter available for microbial degradation. No significant shift in the subseafloor microbiome was observed as a result of environmental changes that occurred shortly after the marine reconnection, 9 ka ago. This supports the general view that the marine reconnection was a gradual process. We conclude that a high‐resolution analysis of downcore changes in the subseafloor microbiome can provide detailed insights into paleoenvironmental conditions and biogeochemical processes that occurred at the time of deposition.

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Section: Resultsmentioning

confidence: 99%

Holocene paleodepositional changes reflected in the sedimentary microbiome of the Black Sea

Giosan

Grice

et al. 2019

Geobiology

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“…Like some other bacteria within the family Rhodobacteraceae, bacteria in the genus Loktanella also have the capacity to stimulate algal growth through vitamin secretion (Dogs et al, 2017). Bacteria in this genus also have algicidal activity (Bloh et al, 2016), suggesting that the colonization of harmful algae onto P. yezoensis may have been inhibited. In addition, bacteria in the family Flavobacteriaceae are reportedly capable of releasing morphogens, and thus induce morphogenesis of macroalgae such as U. mutabilis (Weiss et al, 2017).…”

Section: Discussionmentioning

confidence: 99%

Compositional Shifts of Bacterial Communities Associated With Pyropia yezoensis and Surrounding Seawater Co-occurring With Red Rot Disease

et al. 2019

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Pyropia yezoensis is commercially the most important edible red alga in China, and red rot disease is viewed as one of the major constraints for its cultivation. Microbes within the oomycetic genus Pythium have been reported as the causative agents for this disease; however, little is known about the interactions between the disease and the epiphytic and planktonic bacterial communities. In the present study, bacterial communities associated with uninfected, locally infected, and seriously infected thalli collected from cultivation farms, and within seawater adjacent to the thalli, were investigated using in-depth 16S ribosomal RNA (rRNA) gene sequencing in conjunction with assessing multiple environmental factors. For both thalli and seawater, uninfected and infected communities were significantly different though alpha diversity was similar. Phylogenetic differences between epiphytic bacterial communities associated with P. yezoensis were mainly reflected by the relative changes in the dominant operational taxonomic units (OTUs) assigned as genus Flavirhabdus , genus Sulfitobacter , and family Rhodobacteraceae. The prevalent OTUs in seawater also differed in relative abundance across the communities and were affiliated with diverse taxa, including the phyla Actinobacteria, Verrucomicrobia, and Bacteroidetes, and the classes Alpha- and Gamma-proteobacteria. The differentiation of bacterial communities associated with P. yezoensis and seawater was primarily shaped by reactive silicate (RS) content and salinity, respectively. In particular, 14 potential indicators (two OTUs on P. yezoensis and twelve OTUs in seawater) were identified that significantly differentiated P. yezoensis health statuses and correlated with environmental changes. Overall, the present study provides insights into the alterations of bacterial communities associated with P. yezoensis and surrounding seawater co-occurring with red rot disease. Observed changes were closely associated with health status of algal host, and highlight the potential of using community differentiation to forecast disease occurrence.

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“…Soil or estuarine sediments are also a good source of algicidal bacteria ( Luo et al, 2013 ; Zheng et al, 2018 ; Zhang et al, 2021a ), although the ecological functions of secreted compounds by sediment bacteria are more likely related to the high level of dissolved and particulate organic matter in this environment rather than to induce lysis in planktonic algal populations. Sampling non-axenic or poorly performing algal cultures has incidentally led to the discovery of new algicidal bacteria ( Bloh et al, 2016 ; Fulbright et al, 2016 ; Hu et al, 2021 ). Once collected, strains are typically isolated using agar plate methods ( Figure 4 ).…”

Section: Characterizing Algicidal Bacteria and Algicidesmentioning

confidence: 99%

Algicidal Bacteria: A Review of Current Knowledge and Applications to Control Harmful Algal Blooms

2022

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Interactions between bacteria and phytoplankton in aqueous ecosystems are both complex and dynamic, with associations that range from mutualism to parasitism. This review focuses on algicidal interactions, in which bacteria are capable of controlling algal growth through physical association or the production of algicidal compounds. While there is some evidence for bacterial control of algal growth in the field, our understanding of these interactions is largely based on laboratory culture experiments. Here, the range of these algicidal interactions is discussed, including specificity of bacterial control, mechanisms for activity, and insights into the chemical and biochemical analysis of these interactions. The development of algicidal bacteria or compounds derived from bacteria for control of harmful algal blooms is reviewed with a focus on environmentally friendly or sustainable methods of application. Potential avenues for future research and further development and application of bacterial algicides for the control of algal blooms are presented.

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Loktanella spp. Gb03 as an algicidal bacterium, isolated from the culture of Dinoflagellate Gambierdiscus belizeanus

Cited by 13 publications

References 33 publications

Holocene paleodepositional changes reflected in the sedimentary microbiome of the Black Sea

Holocene paleodepositional changes reflected in the sedimentary microbiome of the Black Sea

Compositional Shifts of Bacterial Communities Associated With Pyropia yezoensis and Surrounding Seawater Co-occurring With Red Rot Disease

Algicidal Bacteria: A Review of Current Knowledge and Applications to Control Harmful Algal Blooms

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