Antibacterial properties of extracts of Ludwigia peploides subsp. montevidensis and Ludwigia grandiflora subsp. hexapetala during their cycle of development

Smida, Imen; Charpy-Roubaud, C. J.; Cherif, Souhila Yahia; Torre, F. Jason; Audran, Gérard; Smiti, Samira; Petit, Jérémy

doi:10.1016/j.aquabot.2014.10.011

Cited by 8 publications

(7 citation statements)

References 17 publications

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“…subsp. montevidensis and polyploid congeners (Rejmánková, 1992; Haury et al., 2014; Smida et al., 2015; Thiébaut and Martinez, 2015; Grewell et al., 2016b). However, the taxon has both asexual and sexual reproductive modes and is self‐compatible.…”

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confidence: 99%

Seed source regions drive fitness differences in invasive macrophytes

Gillard

Drenovsky

Thiébaut

et al. 2020

American J of Botany

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Premise Worldwide, ecosystems are threatened by global changes, including biological invasions. Invasive species arriving in novel environments experience new climatic conditions that can affect their successful establishment. Determining the response of functional traits and fitness components of invasive populations from contrasting environments can provide a useful framework to assess species responses to climate change and the variability of these responses among source populations. Much research on macrophytes has focused on establishment from clonal fragments; however, colonization from sexual propagules has rarely been studied. Our objective was to compare trait responses of plants generated from sexual propagules sourced from three climatic regions but grown under common environmental conditions, using L. peploides subsp. montevidensis as a model taxon. Methods We grew seedlings to reproductive stage in experimental mesocosms under a mediterranean California (MCA) climate from seeds collected in oceanic France (OFR), mediterranean France (MFR), and MCA. Results Seed source region was a major factor influencing differences among invasive plants recruiting from sexual propagules of L. peploides subsp. montevidensis. Trait responses of young individual recruits from MCA and OFR, sourced from geographically distant and climatically distinct source regions, were the most different. The MCA individuals accumulated more biomass, flowered earlier, and had higher leaf N concentrations than the OFR plants. Those from MFR had intermediate profiles. Conclusions By showing that the closer a seedling is from its parental climate, the better it performs, this study provides new insights to the understanding of colonization of invasive plant species and informs its management under novel and changing environmental conditions.

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confidence: 99%

Seed source regions drive fitness differences in invasive macrophytes

Gillard

Drenovsky

Thiébaut

et al. 2020

American J of Botany

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“…First, potentially significant chemotype variations may exist, even among members of the same plant species due to geographical [18] or seasonal variations. Smida et al, for instance, in investigating the antibacterial activities of Ludwigia peploides and Ludwigia grandiflora extracts over a period of several months, reported time-dependent efficacy differences against multiple strains of bacteria, such as gram-positive Staphylococcus aureus and gram-negative Salmonella enterica [19]. Even the microenvironment in which a plant grows may differentially affect its chemical composition.…”

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confidence: 99%

Challenges and Considerations in the Preparation of Novel Antibiotic Phytochemicals

Eichelbaum

Abood

Acuña

et al. 2020

EJMP

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Drug-resistant pathogenic and opportunistic bacteria pose a global health threat. Plants, particularly those employed in traditional (folk) medicine, may provide a source of antimicrobials compounds possessing novel mechanisms of action with which to combat current and emerging infectious diseases. However, experimental designs in ethnobotanical investigations of this type are complicated by several factors. Among these are chemotype variations among plants and plant parts, and potential antagonistic, additive or synergistic effects between plant compounds. These efforts are further hindered by a lack of standardized applicable chemical extraction methods in the field, which makes assessment and comparison of experimental results difficult. This overview thus seeks to provide insight into these complicating factors, give a brief historical survey of ancient investigations into antibiotics, and identify some of the strengths and weaknesses of the various modern methods and techniques routinely employed in ethnobotanical antibiotic research.

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“…Moreover, lots of studies highlight the capacity of environmental bacteria to produce natural antibacterial substances that can be produced by marine heterotrophic bacteria, which may inhibit or kill other bacteria [53][54][55][56][57]. The antibacterial activity of two Ludwigia species (invasive aquatic weeds) against a series of bacteria, including pathogens, has been demonstrated [58]. The production of antibiotics as allelochemicals by phytoplankton and cyanobacteria has also been documented [59][60][61][62][63].…”

Section: Selection Of Drug-resistant Microorganism Can Occur In Surfamentioning

confidence: 99%

Urbanization and Waterborne Pathogen Emergence in Low-Income Countries: Where and How to Conduct Surveys?

Bastaraud

Cecchi

Handschumacher

et al. 2020

IJERPH

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A major forthcoming sanitary issue concerns the apparition and spreading of drug-resistant microorganisms, potentially threatening millions of humans. In low-income countries, polluted urban runoff and open sewage channels are major sources of microbes. These microbes join natural microbial communities in aquatic ecosystems already impacted by various chemicals, including antibiotics. These composite microbial communities must adapt to survive in such hostile conditions, sometimes promoting the selection of antibiotic-resistant microbial strains by gene transfer. The low probability of exchanges between planktonic microorganisms within the water column may be significantly improved if their contact was facilitated by particular meeting places. This could be specifically the case within biofilms that develop on the surface of the myriads of floating macroplastics increasingly polluting urban tropical surface waters. Moreover, as uncultivable bacterial strains could be involved, analyses of the microbial communities in their whole have to be performed. This means that new-omic technologies must be routinely implemented in low- and middle-income countries to detect the appearance of resistance genes in microbial ecosystems, especially when considering the new ‘plastic context.’ We summarize the related current knowledge in this short review paper to anticipate new strategies for monitoring and surveying microbial communities.

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Antibacterial properties of extracts of Ludwigia peploides subsp. montevidensis and Ludwigia grandiflora subsp. hexapetala during their cycle of development

Cited by 8 publications

References 17 publications

Seed source regions drive fitness differences in invasive macrophytes

Seed source regions drive fitness differences in invasive macrophytes

Challenges and Considerations in the Preparation of Novel Antibiotic Phytochemicals

Urbanization and Waterborne Pathogen Emergence in Low-Income Countries: Where and How to Conduct Surveys?

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