The seagrass holobiont: understanding seagrass-bacteria interactions and their role in seagrass ecosystem functioning

Tarquinio, Flavia; Hyndes, Glenn A.; Laverock, Bonnie; Koenders, Annette; Säwström, Christin

doi:10.1093/femsle/fnz057

Cited by 78 publications

(112 citation statements)

References 171 publications

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“…Daleo et al (2007) showed that mycorrhizal fungi facilitates nutrient uptake in dense-flowered cordgrass (Spartina densiflora). Seagrasses also form symbiotic relationships with a variety of microorganisms (bacteria, archaea, and fungi) both above-and belowground (Venkatachalam et al, 2015;Garcias-Bonet et al, 2016;Tarquinio et al, 2019). For example, seagrass association with sulfideoxidizing bacteria alleviates toxic sulfate accumulation (Cúcio et al, 2016;Martin et al, 2019).…”

Section: Seagrass-microbe Interactionsmentioning

confidence: 99%

Positive Ecological Interactions and the Success of Seagrass Restoration

et al. 2020

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Seagrasses provide multiple ecosystem services including nursery habitat, improved water quality, coastal protection, and carbon sequestration. However, seagrasses are in crisis as global coverage is declining at an accelerating rate. With increased focus on ecological restoration as a conservation strategy, methods that enhance restoration success need to be explored. Decades of work in coastal plant ecosystems, including seagrasses, has shown that positive species relationships and feedbacks are critical for ecosystem stability, expansion, and recovery from disturbance. We reviewed the restoration literature on seagrasses and found few studies have tested for the beneficial effects of including positive species interactions in seagrass restoration designs. Here we review the full suite of positive species interactions that have been documented in seagrass ecosystems, where they occur, and how they might be integrated into seagrass restoration. The few studies in marine plant communities that have explicitly incorporated positive species interactions and feedbacks have found an increase in plant growth with little additional resource investment. As oceans continue to change and stressors become more prevalent, harnessing positive interactions between species through innovative approaches will likely become key to successful seagrass restoration.

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Section: Seagrass-microbe Interactionsmentioning

confidence: 99%

Positive Ecological Interactions and the Success of Seagrass Restoration

et al. 2020

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“…Seagrass leaves and roots possess a core of epiphytic bacteria which differ from the microbial strains present in the surrounding sediment and seawater environments (Tarquinio et al 2019). The previous study reported that the bacterial diversity in seagrass leaves and roots showed predominant bacterial phyla belonging to Actinobacteria, Bacteroidetes, Firmicutes, and Proteobacteria (Mishra and Mohanraju 2018;Tarquinio et al 2019).…”

Section: Discussionmentioning

confidence: 99%

“…Seagrasses harbor diverse communities of bacteria including epiphytic and endophytic bacteria symbioses with their leaves and roots. Epiphytic bacteria are nonharmful bacteria that live on the surface of various organs of plants, while endophytic bacteria live inside the plants but have no visibly harmful effects (Tarquinio et al 2019). The epiphytic species provide seagrasses with nitrogen fixation and nutrient cycling.…”

Section: Introductionmentioning

confidence: 99%

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Short Communication: Diversity of culturable epiphytic bacteria isolated from seagrass (Halodule uninervis) in Thailand and their preliminary antibacterial activity

Boontanom

Chantarasiri

2020

Biodiversitas

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Abstract. Boontanom P, Chantarasiri A. 2020. Short Communication: Diversity of culturable epiphytic bacteria isolated from seagrass (Halodule uninervis) in Thailand and their preliminary antibacterial activity. Biodiversitas 21: 2907-2913. Epiphytic bacteria are symbiotic bacteria that live on the surface of seagrasses. This study presents the diversity of culturable epiphytic bacteria associated with the Kuicheai seagrass (H. uninervis) collected from Rayong Province in Eastern Thailand. Nine epiphytic isolates were identified into four phylogenetical genera based on their 16S rRNA nucleotide sequence analyses. They are considered firmicutes in the genera of Planomicrobium, Paenibacillus and Bacillus, and proteobacteria in the genus of Oceanimonas. Three species of epiphytic bacteria preliminarily exhibited antibacterial activity against the human pathogenic Staphylococcus aureus using the perpendicular streak method. The knowledge obtained from this study increases understanding the diversity of seagrass-associated bacteria in Thailand and suggests the utilization of these bacteria for further pharmaceutical applications.

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“…Recent evidence suggests that members of the seagrass microbiome may modulate host growth and response to environmental stresses (15, 18, 19). In addition to fixing nitrogen and producing phytohormones (20, 21), the seagrass microbiome is proposed to mitigate the toxic effects of hydrogen sulfide in sediments, which have been linked to declines in seagrass health and localized die-back events (22–24). The seagrass rhizobiome is thought to be primarily influenced by exudation of carbon compounds, which can provide up to 60% of the carbon assimilated by these microbes (25, 26), and by radial oxygen loss from roots, which may promote colonization of the rhizosphere by distinct bacteria (24, 27).…”

Section: Introductionmentioning

confidence: 99%

Recovery and Community Succession of theZostera marinaRhizobiome After Transplantation

Wang

English

Tomàs

et al. 2020

Preprint

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18Seagrasses can form mutualisms with their microbiomes that facilitate the exchange of 19 energy sources, nutrients, and hormones, and ultimately impact plant stress resistance. Little is 20 known about community succession within the belowground seagrass microbiome after 21 disturbance and its potential role in the plant's recovery after transplantation. We transplanted 22 Zostera marina shoots with and without an intact rhizosphere and cultivated plants for four 23 weeks while characterizing microbiome recovery and effects on plant traits. Rhizosphere and 24 root microbiomes were compositionally distinct, likely representing discrete microbial niches. 25 Furthermore, microbiomes of washed transplants were initially different from those of sod 26 transplants, and recovered to resemble an undisturbed state within fourteen days. Conspicuously, 27 changes in microbial communities of washed transplants corresponded with changes in 28 rhizosphere sediment mass and root biomass, highlighting the strength and responsive nature of 29 the relationship between plants, their microbiome, and the environment. Potential mutualistic 30 microbes that were enriched over time include those that function in the cycling and turnover of 31 sulfur, nitrogen, and plant-derived carbon in the rhizosphere environment. These findings 32 highlight the importance and resiliency of the seagrass microbiome after disturbance. 33 Consideration of the microbiome will have meaningful implications on habitat restoration 34 practices. 35Importance 37 Seagrasses are important coastal species that are declining globally, and transplantation 38 can be used to combat these declines. However, the bacterial communities associated with 39 seagrass rhizospheres and roots (the microbiome) are often disturbed or removed completely 40 prior to transplantation. The seagrass microbiome benefits seagrasses through metabolite, 41 nutrient, and phytohormone exchange, and contributes to the ecosystem services of seagrass 42 meadows by cycling sulfur, nitrogen, and carbon. This experiment aimed to characterize the 43 importance and resilience of the seagrass belowground microbiome by transplanting Zostera 44 marina with and without intact rhizospheres and tracking microbiome and plant morphological 45 recovery over four weeks. We found the seagrass microbiome to be resilient to transplantation 46 disturbance, recovering after fourteen days. Additionally, microbiome recovery was linked with 47 seagrass morphology, coinciding with increases in rhizosphere sediment mass and root biomass. 48Results of this study can be used to include microbiome responses in informing future restoration 49 work. 52The rhizobiome has long been recognized to have important impacts on plant growth and 53 health (1). The microbes of the rhizobiome, which directly interact with and are influenced by 54 the roots (2), can benefit their plant hosts through recycling and producing bioavailable nutrients 55 (3-5), increasing disease resistance through competition with or in...

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The seagrass holobiont: understanding seagrass-bacteria interactions and their role in seagrass ecosystem functioning

Cited by 78 publications

References 171 publications

Positive Ecological Interactions and the Success of Seagrass Restoration

Positive Ecological Interactions and the Success of Seagrass Restoration

Short Communication: Diversity of culturable epiphytic bacteria isolated from seagrass (Halodule uninervis) in Thailand and their preliminary antibacterial activity

Recovery and Community Succession of theZostera marinaRhizobiome After Transplantation

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