Diversity of epiphytic bacterial communities on male and female Sargassum thunbergii

Wang, Jing; Yang, Zhibo; Wang, Gaoge; Shang, Shuai; Tang, Xuexi; Xiao, Hui

doi:10.1186/s13568-022-01439-1

Cited by 6 publications

(2 citation statements)

References 45 publications

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“…According to Hurd et al (2014), another mechanism of metal tolerance in marine macroalgae involves the ability of microorganisms that inhabit the algal surface to sequester metals by adsorption or detoxification. Several complex mechanisms are involved in macroalgae-bacteria interactions (Martin et al, 2014;Kouzuma and Watanabe, 2015;Ramanan et al, 2016;You et al, 2021;Wang et al, 2022). These interactions have received little attention in relation to metal pollution (see Paix et al, 2021;You et al, 2021).…”

Section: Sequestration By Microfoulingmentioning

confidence: 99%

Mechanisms of Tolerance in Metal-exposed Brown Algae and the Importance of Monitoring Studies: A Review

Montenegro

2024

Ecotoxicol. Environ. Contam.

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Marine habitats are under threat from the continued release of contaminants into waterways, and monitoring becomes crucialto future management decisions and regulations to protect these environments. A key aspect of this monitoring is the choiceof a marine species that is able to cope with this pollution, and the tolerant species exhibit more relevant ecological responses.These species-responses are called biomarkers of tolerance and are tested using a variety of measurements that reflect exposureto chemicals. Marine brown macroalgae can be found in a wide range of marine environments, including those with high metalpollution and they are widely used in monitoring programs. Mechanisms of tolerance are vital to the survival of this group ofmacroalgae in polluted habitats, but these mechanisms have not yet been reviewed. The aim of this critical review article isto summarize the historical information available regarding metal tolerance in marine brown macroalgae. We review studiesabout tolerance mechanisms in marine brown macroalgae exposed to metals, conducted both under experimental conditionsand in the field. Also, bibliometric analyses are used to identify the most relevant investigations, country contributions andgaps in knowledge on the topic. Results showed that the principal extracellular tolerance mechanisms described for marinebrown macroalgae are physical exclusion, exudated ligands, and metal-binding to the cell wall. Epiphytic microorganismswere also found to be capable of accumulating a given metal. Internally, metallothioneins and phytochelatins were importantchelators; furthermore, antioxidant responses may increase metal tolerance. Omics analyses were used to reveal the internalmechanisms used by these macroalgae. Biomarkers of tolerance have occasionally been used in monitoring studies, providingadditional information regarding tolerance to complex chemical mixtures found in the field. Future studies should make use ofthese biomarkers to improve our understanding of metal-tolerance strategies.

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Section: Sequestration By Microfoulingmentioning

confidence: 99%

Mechanisms of Tolerance in Metal-exposed Brown Algae and the Importance of Monitoring Studies: A Review

Montenegro

2024

Ecotoxicol. Environ. Contam.

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“…In fact, sex can lead to differences in the morphology, structure and function of dioecious plants (Tang, 2020;Lu et al, 2021;Zeng et al, 2022), and there are also some differences in enzyme activity (Chen et al, 2020), secondary metabolites (Li et al, 2022) and endogenous hormone levels (Ge et al, 2021), but there have been few studies on sex differences in endophytic bacteria in plants. Some studies have revealed differences in epiphytic bacterial communities in plants of different sexes, such as in Populus cathayana (Liu et al, 2021), Sargassum thunbergii (Wang et al, 2022b), and Porphyra haitanensis (Yang et al, 2022). However, for marine macroalgae, whether sex has an impact on the assembly of endophytic bacterial communities is still unknown.…”

Section: Introductionmentioning

confidence: 99%

The host sex contributes to the endophytic bacterial community in Sargassum thunbergii and their receptacles

Zhao,

Sun,

et al. 2024

Front. Microbiol.

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Endophytic bacteria have a complex coevolutionary relationship with their host macroalgae. Dioecious macroalgae are important producers in marine ecosystems, but there is still a lack of research on how sex influences their endophytic bacteria. In this study, the endophytic bacterial communities in male and female S. thunbergii and their reproductive tissues (receptacles) were compared using culture methods and high-throughput sequencing. The endophytic bacterial communities detected by the two methods were different. Among the 78 isolated strains, the dominant phylum, genus, and species were Bacillota, Alkalihalobacillus, and Alkalihalobacillus algicola, respectively, in the algal bodies, while in the receptacles, they were Bacillota, Vibrio, and Vibrio alginolyticus. However, 24 phyla and 349 genera of endophytic bacteria were identified by high-throughput sequencing, and the dominant phylum and genus were Pseudomonadota and Sva0996_ Marine_ Group, respectively, in both the algal body and the receptacles. The two methods showed similar compositions of endophytic bacterial communities between the samples of different sexes, but the relative abundances of dominant and specific taxa were different. The high-throughput sequencing results showed more clearly that the sex of the host alga had an effect on its endophyte community assembly and a greater effect on the endophytic bacterial community in the receptacles. Moreover, most specific bacteria and predicted functional genes that differed between the samples from the males and females were related to metabolism, suggesting that metabolic differences are the main causes of sex differences in the endophytic bacterial community. Our research is the first to show that host sex contributes to the composition of endophytic bacterial communities in dioecious marine macroalgae. The results enrich the database of endophytic bacteria of dioecious marine macroalgae and pave the way for better understanding the assembly mechanism of the endophytic bacterial community of algae.

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Study on gender differences between male and female Sargassum thunbergii based on metabolomic analysis and physiological functions

Qiu,

Sun,

et al. 2023

Algal Research

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Diversity of epiphytic bacterial communities on male and female Sargassum thunbergii

Cited by 6 publications

References 45 publications

Mechanisms of Tolerance in Metal-exposed Brown Algae and the Importance of Monitoring Studies: A Review

Mechanisms of Tolerance in Metal-exposed Brown Algae and the Importance of Monitoring Studies: A Review

The host sex contributes to the endophytic bacterial community in Sargassum thunbergii and their receptacles

Study on gender differences between male and female Sargassum thunbergii based on metabolomic analysis and physiological functions

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