Growth‐promoting bacteria for the green seaweed
            <i>Ulva clathrata</i>

Gemin, Maxence; Peña‐Rodríguez, Alberto; Quiroz‐Guzmán, Eduardo; Magallón‐Servín, Paola; Barajas-Sandoval, Diana R.; Elizondo‐González, Regina

doi:10.1111/are.14336

Cited by 10 publications

(6 citation statements)

References 37 publications

(63 reference statements)

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“…In the absence of these specific bacteria, Ulva merely grows as a loose aggregation of cells without rhizoids or proper cell wall development. In addition to morphogenesis, bacteria are known to promote Ulva growth (Gemin et al, 2019), induce settlement of zoospores (Joint et al, 2000; Patel et al, 2003) and affect the biochemical composition of the seaweed (Polikovsky et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Salinity and host drive Ulva‐associated bacterial communities across the Atlantic–Baltic Sea gradient

et al. 2022

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The green seaweed Ulva is a model system to study seaweed-bacteria interactions, but the impact of environmental drivers on the dynamics of these interactions is little understood. In this study, we investigated the stability and variability of the seaweedassociated bacteria across the Atlantic-Baltic Sea salinity gradient. We characterized the bacterial communities of 15 Ulva sensu lato species along 2,000 km of coastline in a total of 481 samples. Our results demonstrate that the Ulva-associated bacterial composition was strongly structured by both salinity and host species (together explaining between 34% and 91% of the variation in the abundance of the different bacterial genera). The largest shift in the bacterial consortia coincided with the horohalinicum (5-8 PSU, known as the transition zone from freshwater to marine conditions). Lowsalinity communities especially contained high relative abundances of Luteolibacter, Cyanobium, Pirellula, Lacihabitans and an uncultured Spirosomaceae, whereas high-salinity communities were predominantly enriched in Litorimonas, Leucothrix, Sulfurovum, Algibacter and Dokdonia. We identified a small taxonomic core community (consisting of Paracoccus, Sulfitobacter and an uncultured Rhodobacteraceae), which together contributed to 14% of the reads per sample, on average. Additional core taxa followed a gradient model, as more core taxa were shared between neighbouring salinity ranges than between ranges at opposite ends of the Atlantic-Baltic Sea gradient. Our results contradict earlier statements that Ulva-associated bacterial communities are taxonomically highly variable across individuals and largely stochastically defined. Characteristic bacterial communities associated with distinct salinity regions may therefore facilitate the host's adaptation across the environmental gradient.

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Section: Introductionmentioning

confidence: 99%

Salinity and host drive Ulva‐associated bacterial communities across the Atlantic–Baltic Sea gradient

et al. 2022

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“…The bacterial communities are mainly composed of Alphaproteobacteria and Bacteroidete members, especially within the Rhodobacteriaceae , Sphingomonadaceae , Flavobacteriaceae, and Sapropiraceae families [ 212 ]. Several of these marine bacteria will have an impact on the morphologies and polymorphisms of various Ulva species, such as U. clathrata [ 213 ], U. fasciata [ 214 ], U. intestinalis [ 215 ], U. linza [ 216 ], U. mutabilis [ 215 , 217 ], or U. pertusa [ 218 ].…”

Section: Marine Macroalgaementioning

confidence: 99%

Exchange or Eliminate: The Secrets of Algal-Bacterial Relationships

Burgunter-Delamare,

Shetty,

Vuong

et al. 2024

Plants

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Algae and bacteria have co-occurred and coevolved in common habitats for hundreds of millions of years, fostering specific associations and interactions such as mutualism or antagonism. These interactions are shaped through exchanges of primary and secondary metabolites provided by one of the partners. Metabolites, such as N-sources or vitamins, can be beneficial to the partner and they may be assimilated through chemotaxis towards the partner producing these metabolites. Other metabolites, especially many natural products synthesized by bacteria, can act as toxins and damage or kill the partner. For instance, the green microalga Chlamydomonas reinhardtii establishes a mutualistic partnership with a Methylobacterium, in stark contrast to its antagonistic relationship with the toxin producing Pseudomonas protegens. In other cases, as with a coccolithophore haptophyte alga and a Phaeobacter bacterium, the same alga and bacterium can even be subject to both processes, depending on the secreted bacterial and algal metabolites. Some bacteria also influence algal morphology by producing specific metabolites and micronutrients, as is observed in some macroalgae. This review focuses on algal-bacterial interactions with micro- and macroalgal models from marine, freshwater, and terrestrial environments and summarizes the advances in the field. It also highlights the effects of temperature on these interactions as it is presently known.

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“…While studies have identified the bacteria required for Ulva development [ 1 , 150 , 151 ], studies identifying specific bacteria influencing the growth of mature thallus and the biochemical composition of the biomass are still lacking. To date, a limited number of studies have attempted to demonstrate that certain bacteria can promote Ulva growth [ 167 , 168 ] and can affect the biochemical composition of Ulva [ 116 ]. Further, examination of the molecular mechanisms driving Ulva : microbial interactions is still limited.…”

Section: Strategies To Improve Ulva Biomass Yield ...mentioning

confidence: 99%

Applications of Ulva Biomass and Strategies to Improve Its Yield and Composition: A Perspective for Ulva Aquaculture

Simón

McHale

Sulpice

2022

Biology

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Sea lettuce (Ulva spp.), with its worldwide distribution and remarkable ability to grow rapidly under various conditions, represents an important natural resource that is still under-exploited. Its biomass can be used for a wide range of applications in the food/feed, pharmaceutical, nutraceutical, biofuel, and bioremediation industries. However, knowledge of the factors affecting Ulva biomass yield and composition is far from complete. Indeed, the respective contributions of the microbiome, natural genetic variation in Ulva species, environmental conditions and importantly, the interactions between these three factors on the Ulva biomass, have been only partially elucidated. Further investigation is important for the implementation of large-scale Ulva aquaculture, which requires stable and controlled biomass composition and yields. In this review, we document Ulva biomass composition, describe the uses of Ulva biomass and we propose different strategies for developing a sustainable and profitable Ulva aquaculture industry.

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Growth‐promoting bacteria for the green seaweed Ulva clathrata

Cited by 10 publications

References 37 publications

Salinity and host drive Ulva‐associated bacterial communities across the Atlantic–Baltic Sea gradient

Salinity and host drive Ulva‐associated bacterial communities across the Atlantic–Baltic Sea gradient

Exchange or Eliminate: The Secrets of Algal-Bacterial Relationships

Applications of Ulva Biomass and Strategies to Improve Its Yield and Composition: A Perspective for Ulva Aquaculture

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