Polyploidy in invasive Solidago canadensis increased plant nitrogen uptake, and abundance and activity of microbes and nematodes in soil

Wu, Shuqi; Cheng, Jiliang; Xu, Xinyu; Zhang, Yi; Zhao, Yexin; Li, Huixin; Sheng, Qiang

doi:10.1016/j.soilbio.2019.107594

Cited by 34 publications

(24 citation statements)

References 76 publications

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“…Alternatively, the significant enrichment of PAH-RHD GN genes in the rhizospheres of the hybrid and the allopolyploid could be due to a larger total bacterial community as recently reported for Solidago polyploids (Wu et al 2019). Regardless of the underlying mechanism, the higher abundance of PAH-RHD genes in the rhizosphere of the hybrid and the allopolyploid suggest a heightened capacity for contaminant tolerance and degradation.…”

Section: Accepted Manuscript Discussionmentioning

confidence: 66%

Phenanthrene contamination and ploidy level affect the rhizosphere bacterial communities of Spartina spp.

Cavé‐Radet

Monard

Amrani

et al. 2020

FEMS Microbiology Ecology

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Spartina spp. are widely distributed salt marsh plants that have a recent history of hybridization and polyploidization. These events have resulted in a heightened tolerance to hydrocarbon contaminants, but the effects of this phenomenon on the rhizosphere microbial communities is unknown. Here, we grew two parental Spartina species, their hybrid and the resulting allopolyploid in salt marsh sediments that were contaminated or not with phenanthrene. The DNA from the rhizosphere soil was extracted and the bacterial 16S rRNA gene was amplified and sequenced, whereas the abundances of the genes encoding for the PAH ring-hydroxylating dioxygenase (RHD) of gram-negative and gram-positive bacteria were quantified by real-time PCR. Both the contamination and the plant genotype significantly affected the bacterial communities. In particular, the allopolyploid S. anglica, harbored a more diverse bacterial community in its rhizosphere. The interspecific hybrid and the allopolyploid also harbored significantly more copies of the PAH-RHD gene of gram-negative bacteria in their rhizosphere than the parental species, irrespective of the contamination treatments. Overall, our results are showing that the recent polyploidization events in the Spartina affected its rhizosphere bacterial communities, both under normal and contaminated conditions, possibly increasing its phytoremediation potential.

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Section: Accepted Manuscript Discussionmentioning

confidence: 66%

Phenanthrene contamination and ploidy level affect the rhizosphere bacterial communities of Spartina spp.

Cavé‐Radet

Monard

Amrani

et al. 2020

FEMS Microbiology Ecology

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“…Our results provide a possible interpretation on the enhanced competitive ability of polyploids Solidago canadensis in the context of the novel weapons hypothesis (NWH). Our previous studies have revealed a phenomenon that introduced polyploids S. canadensis were more competitive than diploids and native polyploids, these populations could significantly change the above‐ and below‐ground biodiversity under field conditions (Wu et al 2019, Cheng et al 2020). In this study, we try to explain the underlying mechanism through allelopathic effects.…”

Section: Discussionmentioning

confidence: 99%

“…Abundance and activity of soil microbes, arbuscular mycorrhizal fungi (AMF) and nematodes in the rhizosphere soil of introduced polyploids were different from that of diploids. These results indicate another underlying mechanism that the competitive advantage of polyploids over diploid may be due to the improvement of plant nutrient uptake and enhancement of soil microbial biomass (Wu et al 2019). We assume that these variations among different belowground communities are related to the different concentrations of phenolic compounds released and accumulated in rhizosphere soil, but still need more direct and sufficient evidence to conclude.…”

Section: Biodiversity Of Above-and Below-ground Communities May Be Inmentioning

confidence: 96%

Polyploidy‐promoted phenolic metabolism confers the increased competitive ability of Solidago canadensis

Yang

Cheng

Yao

et al. 2021

Oikos

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Allelopathy plays an important role in the successful invasion of alien invasive plants. Phenolic compounds are one of the primary classes of secondary metabolites with strong allelopathic activities. Polyploidy can cause significant effects on the production and yield of plant secondary metabolites. However, the effect of allelopathic potential of phenolic compounds on the competitiveness of different geographical cytotypes of Solidago canadensis remains unknown. We conducted a common garden field experiment in the invasive habitat of China to compare the competitive ability of native and introduced diploid, tetraploid and hexaploid S. canadensis against intentionally planted local weeds. Results showed that introduced tetraploids and hexaploids outcompeted local plants and formed a monodominant community due to superior competitive ability. Phenolic metabolism analysis showed these populations had a high accumulation of total phenolic compounds in aerial parts and rhizosphere soil throughout three developmental stages, which contributed to significant allelopathic effects on tested weeds. However, diploids and native polyploids showed less allelopathic activities due to the low level of total phenolic content. Together, these results suggest polyploidization is one of the reasons that driving the differentiation of phenolic metabolism in different geo-cytotypes of S. canadensis, and the allelopathic abilities of introduced polyploids are further enhanced through a post-introduction adaptive evolution. Polyploidy-promoted allelopathic potential makes introduced polyploids more competitive against local plants than diploids and native polyploids, which contribute to its successful invasion.

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“…Detecting these linkages may be challenging since traits with high adaptive potential at one life stage could be deleterious either at another life stage or under diverse environmental conditions (Suda et al 2015;Martinez et al 2018). Ploidy level and hybridization are both known to affect cell size and biomass (Bashir et al 2014;Corneillie et al 2019;Wu et al 2019), as well as changes in seed weight and size, suggesting that each could play a role in vegetative and reproductive trait variation (Song & Chen, 2015). Polyploidization is also known to result in changes in flowering phenology between diploid and polyploid cytotypes (te Beest et al 2012).…”

Section: Contribution Of Hybridization and Polyploidy To Invasive Potmentioning

confidence: 99%

Epigenetics and the success of invasive plants

Mounger

Aïnouche

Bossdorf

et al. 2021

Phil. Trans. R. Soc. B

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Biological invasions impose ecological and economic problems on a global scale, but also provide extraordinary opportunities for studying contemporary evolution. It is critical to understand the evolutionary processes that underly invasion success in order to successfully manage existing invaders, and to prevent future invasions. As successful invasive species sometimes are suspected to rapidly adjust to their new environments in spite of very low genetic diversity, we are obliged to re-evaluate genomic-level processes that translate into phenotypic diversity. In this paper, we review work that supports the idea that trait variation, within and among invasive populations, can be created through epigenetic or other non-genetic processes, particularly in clonal invaders where somatic changes can persist indefinitely. We consider several processes that have been implicated as adaptive in invasion success, focusing on various forms of ‘genomic shock’ resulting from exposure to environmental stress, hybridization and whole-genome duplication (polyploidy), and leading to various patterns of gene expression re-programming and epigenetic changes that contribute to phenotypic variation or even novelty. These mechanisms can contribute to transgressive phenotypes, including hybrid vigour and novel traits, and may thus help to understand the huge successes of some plant invaders, especially those that are genetically impoverished. This article is part of the theme issue ‘How does epigenetics influence the course of evolution?’

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Polyploidy in invasive Solidago canadensis increased plant nitrogen uptake, and abundance and activity of microbes and nematodes in soil

Cited by 34 publications

References 76 publications

Phenanthrene contamination and ploidy level affect the rhizosphere bacterial communities of Spartina spp.

Phenanthrene contamination and ploidy level affect the rhizosphere bacterial communities of Spartina spp.

Polyploidy‐promoted phenolic metabolism confers the increased competitive ability of Solidago canadensis

Epigenetics and the success of invasive plants

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