Soil nitrogen dynamics and competition during plant invasion: insights from <i>Mikania micrantha</i> invasions in China

Yu, Hongxian; Roux, Johannes J. Le; Jiang, Zhaoyang; Sun, Feng; Peng, Chang-Lian; Li, Weihua

doi:10.1111/nph.17125

Cited by 48 publications

(27 citation statements)

References 96 publications

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“…In the current study, there was a distinction between the weed species and Ms. in terms of soil physicochemical properties, which were essential elements for plant growth and reproduction. The plant community also greatly affects the soil nutrient composition, directly or indirectly, by changing the ecology of the soil ( Yu et al, 2021 ). We found that soil pH decreased in the presence of Ca, which was similar to the effects of Spartina alterniflora previously reported by Tong et al (2011) as a result of changes in the levels of soil cations.…”

Section: Discussionmentioning

confidence: 99%

Weeds in the Alfalfa Field Decrease Rhizosphere Microbial Diversity and Association Networks in the North China Plain

et al. 2022

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The competition between weeds and crops for soil nutrients is affected by soil microorganisms, which drive diverse ecological processes and are critical in maintaining the stability of agroecosystems. However, the effects of plant species identity, particularly between forage and weed, on soil microbial diversity, composition, and association are not well understood. Here, we investigate the soil physicochemical properties and bacterial/fungal communities in an agroecosystem with native alfalfa [Medicago stativa (Ms)] and five common weed species (Digitaria sanguinalis, Echinochloa crusgalli, Acalypha australis, Portulaca oleracea, and Chenopodium album) in the North China Plain. The five weeds had a lower plant carbon content than Ms. while the opposite was true for plant nitrogen and phosphorus concentrations. The Shannon diversity of bacterial and fungal communities of the five weeds were significantly lower than in Ms. Soil pH and PO43−-P were identified as the most important factors in shaping the relative abundances of bacteria (Sphingomonadaceae) and fungi (Pleosporaceae), respectively. Importantly, the weeds greatly inhibited the growth of pathogenic fungi (Nectriaceae and Pleosporaceae). Bacterial co-occurrence networks depended on specific species, indicating that Ms. harbored co-occurrence networks that were more complex than those in the bacterial communities of other weed groups. Our study examines how soil nutrients and the soil microbial community structure of five weed species changed in an Ms. field. This analysis of the microbial ecological network enhances our understanding of the influence of weeds on the soil microbiome in agroecosystems.

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Section: Discussionmentioning

confidence: 99%

Weeds in the Alfalfa Field Decrease Rhizosphere Microbial Diversity and Association Networks in the North China Plain

et al. 2022

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“…The accumulation of beneficial soil bacteria in the rhizosphere of invasive plants increased their nutrient concentration and facilitated their invasion, which in turn provides an indirect advantage for the invasive plants to compete with the native species ( Inderjit and van der Putten, 2010 ; Yu et al, 2021 ). It has been reported that Bacillus inoculated in the rhizospheric soil of plants has a significant growth-promoting function and can promote the absorption of nutrients by plants ( Janarthine and Eganathan, 2012 ; Shameer et al, 2020 ).…”

Section: Discussionmentioning

confidence: 99%

Rhizospheric Bacillus-Facilitated Effects on the Growth and Competitive Ability of the Invasive Plant Ageratina adenophora

Chen

et al. 2022

Front. Plant Sci.

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The rhizospheric microbial community affects the population establishment of invasive plants in introduced areas, among which Bacillus has numerous functions in promoting plant growth. This study isolated and enriched the Bacillus community in the rhizospheric soil of the invasive plant Ageratina adenophora and the native accompanying plant Rabdosia amethystoides. The effects of these rhizospheric Bacillus communities on the growth and competition of A. adenophora and R. amethystoides were evaluated in pot experiments. The results showed that the number and diversity of Bacillus in the rhizospheric soil of A. adenophora were higher than those of R. amethystoides (A. adenophora: 122 strains in soil, 16 Bacillus taxa; R. amethystoides: 88 strains in soil, 9 Bacillus taxa). After Bacillus inoculation of A. adenophora in a pot experiment, Bacillus idriensis, Bacillus toyonensis and Bacillus cereus were accumulated in the rhizospheric of A. adenophora, which significantly increased the nitrate nitrogen (NO3–-N) content in the soil and the total carbon and nitrogen concentrations in A. adenophora in the mixed treatment. The selective accumulation of Bacillus enhanced the competitive advantage of A. adenophora over the native accompanying plant; the corrected index of relative competition intensity of A. adenophora-inoculated Bacillus reached double that of the uninoculated treatment, and the growth of native plants was greatly suppressed under mixed planting. Our study confirmed that invasion of A. adenophora can lead to the accumulation of specific Bacillus taxa in the rhizospheric soil, which in turn can increase the competitive advantage of A. adenophora.

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“…There is considerable evidence suggesting that some invasive plants can successfully modify soil conditions, changing nutrient availability, enzyme activity, microbial activity, which may contribute to further invasion (Callaway et al, 2001; Huang et al, 2018; Shen et al, 2020; Yu et al, 2020). Mikania micrantha increases soil organic carbon, total N, total K, NO 3 ‐N, NH 4 ‐N, available P, and available K content in invaded habitats, all of which may contribute to its competitive advantage over many other plants (Li et al, 2006; Liu et al, 2012).…”

Section: Discussionmentioning

confidence: 99%

“…Mikania micrantha increases soil organic carbon, total N, total K, NO 3 ‐N, NH 4 ‐N, available P, and available K content in invaded habitats, all of which may contribute to its competitive advantage over many other plants (Li et al, 2006; Liu et al, 2012). Nitrogen availability is elevated under M. micrantha invasion through enrichment of microbes that participate in N cycling, in turn increasing available N for plant growth, facilitating high interspecific competition (Yu et al, 2020). Previous studies indicated that M. micrantha depletes soil nutrients during its growth in monoculture or mixed culture (Shen et al, 2015).…”

Section: Discussionmentioning

confidence: 99%

Adventitious roots support population expansion of the invasive plant Mikania micrantha Kunth

Shen

et al. 2021

Physiologia Plantarum

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Mikania micrantha Kunth is a serious invasive alien plant characterized by the formation of an adventitious root system in its prostrate growth form. Unlike the initial roots from seed germination, adventitious roots gradually appear above the stem and branch nodes. Little is known about adventitious roots play on plant growth and population expansion of M. micrantha. We hypothesized that adventitious roots provide an advantage for plant growth and nutrient availability. To test this hypothesis, plant growth, physiology, and nutrition characteristics of M. micrantha were measured under four soil surface conditions allowing various plant parts to touch the soil to stimulate variable adventitious root formation. The results showed that the biomass, stem length, branch number, and adventitious root biomass of M. micrantha were significantly increased (P < 0.05) with increasing nodes bearing adventitious roots. As the number of nodes with adventitious roots increased, the net photosynthetic rate, antioxidant enzyme activities like superoxide dismutase, catalase, peroxidase, and malondialdehyde, chlorophyll content, and plant nutrient contents (N, P, and K) of M. micrantha were increased (P < 0.05), with higher values in main stem leaves than in those of branch leaves. The concentrations of soil organic matter, total N, total P, total K, available N, available P, and available K were greater (P < 0.05) in initial soil (CK) than in treatment soil (with M. micrantha) and were significantly reduced by adventitious roots. Our study was the first to show that plant growth, physiology and nutrition status of M. micrantha were strongly promoted by adventitious roots in the prostrate growth form.

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Soil nitrogen dynamics and competition during plant invasion: insights from Mikania micrantha invasions in China

Cited by 48 publications

References 96 publications

Weeds in the Alfalfa Field Decrease Rhizosphere Microbial Diversity and Association Networks in the North China Plain

Weeds in the Alfalfa Field Decrease Rhizosphere Microbial Diversity and Association Networks in the North China Plain

Rhizospheric Bacillus-Facilitated Effects on the Growth and Competitive Ability of the Invasive Plant Ageratina adenophora

Adventitious roots support population expansion of the invasive plant Mikania micrantha Kunth

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