Inhibition of common fouling organisms in mariculture by epiphytic bacteria from the surfaces of seaweeds and invertebrates

Ma, Yuexin; Liu, Pengliang; Yu, Shubo; Li, Dantong; Shanmao, Cao

doi:10.1016/j.chnaes.2009.08.004

Cited by 23 publications

(7 citation statements)

References 33 publications

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“…A positive correlation between zoospore settlement and bacterial biofilm density points out the important role of bacterial biofilms in the development of algal communities [35] . Ma et al [69] have recently shown that a significant number of bacterial strains are inhibitory against algal spores, suggesting that bacterial biofilms play an important role in algal spore germination and the subsequent colonization. Symbiotic bacteria could, indeed, be an important causative factor leading to morphological and potentially genetic divergence in marine organisms, including algae and sea urchins.…”

Section: Discussionmentioning

confidence: 99%

Symbiotic Associations in the Phenotypically-Diverse Brown Alga Saccharina japonica

Balakirev

Krupnova²,

Ayala

2012

PLoS ONE

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The brown alga Saccharina japonica (Areschoug) Lane, Mayes, Druehl et Saunders is a highly polymorphic representative of the family Laminariaceae, inhabiting the northwest Pacific region. We have obtained 16S rRNA sequence data in symbiont microorganisms of the typical form (TYP) of S. japonica and its common morphological varieties, known as “longipes” (LON) and “shallow-water” (SHA), which show contrasting bathymetric distribution and sharp morphological, life history traits, and ecological differences. Phylogenetic analysis of the 16S rRNA sequences shows that the microbial communities are significantly different in the three forms studied and consist of mosaic sets of common and form-specific bacterial lineages. The divergence in bacterial composition is substantial between the TYP and LON forms in spite of their high genetic similarity. The symbiont distribution in the S. japonica forms and in three other laminarialean species is not related to the depth or locality of the algae settlements. Combined with our previous results on symbiont associations in sea urchins and taking into account the highly specific character of bacteria-algae associations, we propose that the TYP and LON forms may represent incipient species passing through initial steps of reproductive isolation. We suggest that phenotype differences between genetically similar forms may be caused by host-symbiont interactions that may be a general feature of evolution in algae and other eukaryote organisms. Bacterial symbionts could serve as sensitive markers to distinguish genetically similar algae forms and also as possible growth-promoting inductors to increase algae productivity.

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Section: Discussionmentioning

confidence: 99%

Symbiotic Associations in the Phenotypically-Diverse Brown Alga Saccharina japonica

Balakirev

Krupnova²,

Ayala

2012

PLoS ONE

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“…Bacteria living in marine biofilms can produce active compounds against micro-and macro-organisms, including algal spores (Berland et al 1972;Holmstrom et al 1996;Lovejoy et al 1998;Egan et al 2001a;Harder et al 2004;Mieszkin et al 2013). For instance, from 192 epiphytic bacterial isolates from algae, 63 isolates inhibited spore settlement of the green algae Ulva lactuca (Ma et al 2009). Further, Tebben et al (2014) showed that Pseudoalteromonas isolated from the CCA Neogoniolithon fosliei, a genus used in our experiment, produce antibacterial, antifungal and antiprotozoal substances.…”

Section: Effects Of Cca-associated Microbes On Seaweed Settlementmentioning

confidence: 56%

Crustose coralline algae and associated microbial biofilms deter seaweed settlement on coral reefs

Gómez-Lemos

Díaz-Pulido

2017

Coral Reefs

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Crustose coralline algae (CCA), a group of calcifying red algae found commonly in benthic marine ecosystems worldwide, perform essential ecological functions on coral reefs, including creating benthic substrate, stabilizing the reef structure and inducing coral settlement. An important feature of CCA is the ability to keep their surfaces free of epiphytic algae, thereby reducing algal overgrowth and allowing them access to light. However, the mechanisms by which CCA prevent settlement of opportunistic seaweeds (fleshy macroalgae) are not fully understood, nor is whether these mechanisms vary among CCA species. In our study based on the Great Barrier Reef, we demonstrate that three common CCA species (Titanoderma pustulatum, Porolithon onkodes and Neogoniolithon sp.) have a remarkable ability to deter settlement of seaweed spores. We provide experimental evidence that the CCA use allelopathy and microbial inhibition against the settlement of spores of the brown seaweed Padina boergesenii. Methanol extracts of allelopathic compounds from T. pustulatum, Po. onkodes and Neogoniolithon sp. significantly reduced the settlement of Pa. boergesenii spores by 4.3 times, 3.0 and 3.8 times, respectively. Further, we found that microbial biofilms, while having a lower inhibitory effect than allelopathic compounds, also reduced seaweed settlement of Pa. boergesenii. Our study demonstrates that allelopathy and microbial inhibition, in addition to epithallial tissue sloughing, are mechanisms employed by CCA to prevent the settlement of epiphytic algae. Understanding the mechanisms by which CCA avoid seaweed overgrowth contributes to our understanding of the dynamics of seaweed proliferations on reefs and to the ecological knowledge of this important group of reefbuilding organisms.

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“…Quorum sensing (QS) is a type of bacterial cell–cell communication that is commonly associated with the release of signals that regulate virulence and pathogenicity-related genes. Inhibition of QS has been shown to reduce the pressure to produce drug resistance in bacteria by limiting virulence and pathogenicity [ 9 ]. Chromobacterium violaceum is a Gram-negative bacillus that is commonly found in soil and freshwater.…”

Section: Introductionmentioning

confidence: 99%

Antimicrobial and quorum sensing inhibitory activity of epiphytic bacteria isolated from the red alga Halymenia durvillei

Padayao,

Patalinghug

et al. 2023

Access Microbiology

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Halymenia durvillei is a red alga that is commonly utilized in the Philippines as food and as a source of high-value natural products for industrial applications. However, there are no studies regarding the microbial community associated with H. durvillei and its potential applications. This study aimed to isolate and identify the epiphytic bacteria of H. durvillei and determine their antimicrobial and quorum sensing inhibitory (QSI) effects. The thalli of H. durvillei were collected at the shores of Santa Fe, Bantayan, Cebu, Philippines. Bacterial isolates were identified using 16S rRNA, and their ethyl acetate (EtOAc) extracts were subjected to antimicrobial susceptibility tests against representative species of yeast and Gram-negative and Gram-positive bacteria. Their QSI activity against Chromobacterium violaceum was also determined. Fourteen distinct bacterial colonies belonging to four genera, namely Alteromonas (3), Bacillus (5), Oceanobacillus (1) and Vibrio (5), were successfully isolated and identified. All 14 bacterial isolates exhibited antibacterial effects. EPB9, identified as Bacillus safensis , consistently showed the strongest inhibition against Escherichia coli , Staphylococcus aureus and Staphylococcus epidermidis , with minimum inhibitory concentrations (MICs) ranging from 0.0625 to 1.0 mg ml−1. In contrast, all 14 isolates showed weak antifungal effects. Both B. safensis (EPB9) and Bacillus australimaris (EPB15) exhibited QSI effects at 100 mg ml−1, showing opaque zones of 3.1±0.9 and 3.8±0.4 mm, respectively. This study is the first to isolate and identify the distinct microbial epiphytic bacterial community of H. durvillei and its potential as an abundant resource for new antibacterial and QSI bioactives.

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Inhibition of common fouling organisms in mariculture by epiphytic bacteria from the surfaces of seaweeds and invertebrates

Cited by 23 publications

References 33 publications

Symbiotic Associations in the Phenotypically-Diverse Brown Alga Saccharina japonica

Symbiotic Associations in the Phenotypically-Diverse Brown Alga Saccharina japonica

Crustose coralline algae and associated microbial biofilms deter seaweed settlement on coral reefs

Antimicrobial and quorum sensing inhibitory activity of epiphytic bacteria isolated from the red alga Halymenia durvillei

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