Interactions between exotic invasive plants and soil microbes in the rhizosphere suggest that ‘everything is not everywhere’

Rout, Marnie E.; Callaway, Ragan M.

doi:10.1093/aob/mcs061

Cited by 92 publications

(59 citation statements)

References 91 publications

(141 reference statements)

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“…However, symbiotic nitrogen-fixation has also been implicated in facilitating the invasion of some of the most widespread and problematic legume species of the world30, giving the appearance that compatible rhizobia are cosmopolitan in their distribution. Based on these isolated observations and studies, it has been difficult to establish a general pattern with respect to the role of symbiosis in limiting or facilitating legume establishment34. Though the size of our analysis and its global extent is unprecedented, we acknowledge that only a fraction of the estimated ∼19,000 legume species have been characterized for their symbiosis ability (∼20% species and ∼60% of legume genera35).…”

Section: Discussionmentioning

confidence: 99%

Symbiosis limits establishment of legumes outside their native range at a global scale

et al. 2017

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Microbial symbiosis is integral to plant growth and reproduction, but its contribution to global patterns of plant distribution is unknown. Legumes (Fabaceae) are a diverse and widely distributed plant family largely dependent on symbiosis with nitrogen-fixing rhizobia, which are acquired from soil after germination. This dependency is predicted to limit establishment in new geographic areas, owing to a disruption of compatible host-symbiont associations. Here we compare non-native establishment patterns of symbiotic and non-symbiotic legumes across over 3,500 species, covering multiple independent gains and losses of rhizobial symbiosis. We find that symbiotic legume species have spread to fewer non-native regions compared to non-symbiotic legumes, providing strong support for the hypothesis that lack of suitable symbionts or environmental conditions required for effective nitrogen-fixation are driving these global introduction patterns. These results highlight the importance of mutualisms in predicting non-native species establishment and the potential impacts of microbial biogeography on global plant distributions.

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Section: Discussionmentioning

confidence: 99%

Symbiosis limits establishment of legumes outside their native range at a global scale

et al. 2017

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“…2011; Flory and Clay 2013; Maron et al. 2013b), in part because the composition and relative abundance of pathogens in introduced ranges differ from those in native ranges as a result of geographic isolation and local evolution (Rout and Callaway 2012). This leads to pathogen interactions in the introduced range that could potentially contribute to invasiveness through a number of different mechanisms including (1) the inhibition of pathogens in the introduced range by the invading plant species (Zhang et al.…”

Section: Introductionmentioning

confidence: 99%

“…2010; Flory et al. 2011; Rout and Callaway 2012), and often, interpretations of pathogen accumulation are based on observations of plant impacts rather than quantitative changes in pathogen populations or species richness (Flory et al. 2011; Rout and Callaway 2012).…”

Section: Introductionmentioning

confidence: 99%

“…2011; Rout and Callaway 2012), and often, interpretations of pathogen accumulation are based on observations of plant impacts rather than quantitative changes in pathogen populations or species richness (Flory et al. 2011; Rout and Callaway 2012). Rarely have the soil pathogens associated with invasive plant species been described (Packer and Clay 2000; Zhang et al.…”

Section: Introductionmentioning

confidence: 99%

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Virulence of oomycete pathogens from Phragmites australis‐invaded and noninvaded soils to seedlings of wetland plant species

Crocker

Karp

Nelson

2015

Ecology and Evolution

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Soil pathogens affect plant community structure and function through negative plant–soil feedbacks that may contribute to the invasiveness of non-native plant species. Our understanding of these pathogen-induced soil feedbacks has relied largely on observations of the collective impact of the soil biota on plant populations, with few observations of accompanying changes in populations of specific soil pathogens and their impacts on invasive and noninvasive species. As a result, the roles of specific soil pathogens in plant invasions remain unknown. In this study, we examine the diversity and virulence of soil oomycete pathogens in freshwater wetland soils invaded by non-native Phragmites australis (European common reed) to better understand the potential for soil pathogen communities to impact a range of native and non-native species and influence invasiveness. We isolated oomycetes from four sites over a 2-year period, collecting nearly 500 isolates belonging to 36 different species. These sites were dominated by species of Pythium, many of which decreased seedling survival of a range of native and invasive plants. Despite any clear host specialization, many of the Pythium species were differentially virulent to the native and non-native plant species tested. Isolates from invaded and noninvaded soils were equally virulent to given individual plant species, and no apparent differences in susceptibility were observed between the collective groups of native and non-native plant species.

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“…Numerous studies have shown that soil microbes are one of the key components that either facilitate or inhibit plant invasion (Bever, 2003;Inderjit & van der Putten, 2010;van der Putten et al, 2013;Inderjit & Cahill, 2015). Therefore, knowledge on the interactions between soil microbes and exotic invasive plant species provide a better understanding of the ecological roles of the soil biota functioning both at root-soil and root interface (Rout & Callaway, 2012).…”

Section: Introductionmentioning

confidence: 99%

Role and influence of soil microbial communities on plant invasion

Ravi

Muthukumar

2017

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Abstract. It is known that plant invasions are of major concern as they result in loss of biodiversity and alterations in ecosystem processes and functions. Although numerous mechanisms have been postulated to find out the reasons behind plant invasiveness, the actual and precise mechanism is still obscure. Soil microbes are considered as one of the important determinants of plant growth and establishment. Plant invasion leads to changes in the composition and structure of soil microorganisms. Most of the earlier studies have focused on the aboveground mechanisms of plant invasion. Recently the belowground mechanisms for plant invasion are being investigated. In this review, we focus on the various hypotheses related to soil microbes in either enhancing or suppressing plant invasions. The interactions between soil microbes with native and non-native plant species, the role of the plant-soil feedback system in the invasion and its impact, the function of mycorrhizal and bacterial symbiosis in plant species invasion and the role of soil biota and changes brought about in soil nutrient cycling and soil enzymes due to plant invasion are also discussed.

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Interactions between exotic invasive plants and soil microbes in the rhizosphere suggest that ‘everything is not everywhere’

Cited by 92 publications

References 91 publications

Symbiosis limits establishment of legumes outside their native range at a global scale

Symbiosis limits establishment of legumes outside their native range at a global scale

Virulence of oomycete pathogens from Phragmites australis‐invaded and noninvaded soils to seedlings of wetland plant species

Role and influence of soil microbial communities on plant invasion

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