Influences of plant interspecific competition and arbuscular mycorrhizal fungi on nitrogen form preference of an invasive plant

Huangfu, Chaohe; Li, Keli; Hui, Dafeng

doi:10.1007/s10533-019-00607-z

Cited by 15 publications

(9 citation statements)

References 113 publications

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“…Root samples were then oven-dried in paper bags at 65°C for 72 h, ground (MM2, Retsch, Haan, Germany) to a fine powder and aliquots of dried sample (ca. 2 mg) was analyzed by IRMS for 15 N atom% and N concentrations ( Huangfu et al, 2019 ).…”

Section: Methodsmentioning

confidence: 99%

“…We also set aside subsample ( ca . 0.05 g) of fine root from each species to determined root colonization by AM fungi as we previously described ( Huangfu et al, 2019 ), and root AM fungi colonization (%) was calculated.…”

Section: Methodsmentioning

confidence: 99%

“…On the one hand, all species in the community are facing resource competition from other coexisting species, the uptake capacity of different N sources is affected by interspecific competition (e.g., Miller et al, 2007 ; Simon et al, 2014 ). Plants have evolved different nutrient acquisition strategies, and the most important one is niche differentiation, which shows that there are preference differences among species for different forms of N to avoid competition ( Simon et al, 2017 ; Huangfu et al, 2019 ). For example, Huangfu et al (2019) found that exotic plant Flaveria bidentis and coexisting species Amaranthus retroflexus preferred to take up N in the form of NO

in monoculture, while the former tended to increase the acquisition of NH

, while the latter had more uptakes of NO

when they were grown together in competition.…”

Section: Introductionmentioning

confidence: 99%

“…Plants have evolved different nutrient acquisition strategies, and the most important one is niche differentiation, which shows that there are preference differences among species for different forms of N to avoid competition ( Simon et al, 2017 ; Huangfu et al, 2019 ). For example, Huangfu et al (2019) found that exotic plant Flaveria bidentis and coexisting species Amaranthus retroflexus preferred to take up N in the form of NO

in monoculture, while the former tended to increase the acquisition of NH

, while the latter had more uptakes of NO

when they were grown together in competition. So the flexibility of N acquisition is considered to be an important strategy for plants to reduce niche overlap and mitigate N competition (niche partitioning) to achieve coexistence ( McKane et al, 2002 ; Ashton et al, 2010 ).…”

Section: Introductionmentioning

confidence: 99%

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Nitrogen Uptake by Two Plants in Response to Plant Competition as Regulated by Neighbor Density

2020

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Plant species may acquire different forms of nitrogen (N) to reduce competition for the same resource, but how plants respond to neighbors with different densities in their N uptake is still poorly understood. We investigated the effects of competition regime on the uptake of different N forms by two hygrophytes, Carex thunbergii and Polygonum criopolitanum, by conducting a hydroponic test of excised roots and an in situ experiment in a subtropical wetland ecosystem. The two species were grown either in monocultures or mixtures with various neighbor densities. Root functional traits and N uptake rates of different N forms were measured. Our results showed that N uptake was mainly determined by N form, rather than species identity. Both species were able to use organic N sources, but they took up relatively more N supplied as NO3- than as NH4+ or glycine, irrespective of competition treatments. Both species preferred NO3- when grown in monoculture, but in the presence of competitors, the preference of fast-growing C. thunbergii persisted while P. criopolitanum acquired more NH4+ and glycine, with stronger responses being observed at the highest neighbor density. The hydroponic test suggested that these divergences in N acquisition between two species might be partially explained by different root functional traits. To be specific, N uptake rates were significantly positively correlated with root N concentration and specific root length, but negatively correlated with root dry matter content. Our results implicated that C. thunbergii has a competitive advantage with relatively more stable N acquisition strategy despite a lower N recovery than P. criopolitanum, whereas P. criopolitanum could avoid competition with C. thunbergii via a better access to organic N sources, partly mediated by competition regimes.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

in monoculture, while the former tended to increase the acquisition of NH

, while the latter had more uptakes of NO

when they were grown together in competition.…”

Section: Introductionmentioning

confidence: 99%

in monoculture, while the former tended to increase the acquisition of NH

, while the latter had more uptakes of NO

Section: Introductionmentioning

confidence: 99%

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Nitrogen Uptake by Two Plants in Response to Plant Competition as Regulated by Neighbor Density

2020

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“…For example, the invasive species Mikania micrantha, Ipomoea cairica, Wedelia trilobata and Bidens pilosa performed better when supplied with NO 3 - than with NH 4 + (Chen et al ., 2018). However, the invasive species Flaveria bidentis is able to use either NO 3 - or NH 4 + depending on which form is most available in the environments, and this promiscuity probably has contributed to its dominance in many communities (Huangfu et al ., 2019). To test whether a preference for a certain N form or promiscuity contribute to invasion success in general, we need studies that compare successful with less successful invaders.…”

Section: Introductionmentioning

confidence: 99%

Widely naturalized species are not more promiscuous in the use of different nitrogen forms, but benefit more from inorganic nitrogen

Zeng

Liu

Kleunen

2021

Preprint

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Nitrogen (N) is an essential mineral nutrient necessary for plant growth and has been considered a crucial factor influencing invasion success. Former studies mainly focused on responses of alien plants to different levels of N availability. However, in natural soils, N comes in different forms. Few experimental studies have explored responses of naturalized alien species to different N forms, and whether such responses are related to their naturalization success globally. We selected 22 common herbaceous species native to Germany that have all become naturalized and thus been introduced elsewhere in the world. We grew these species under six different N conditions that differed in the amount or form of N, and assessed their growth performance in a greenhouse experiment. We found that plants produced more biomass when grown under high N levels than under low N levels, and when N was provided in inorganic form than when provided in organic form. Neither biomass production nor promiscuity to different N forms was related to naturalization success of the species. However, the biomass response to inorganic N, relative to organic N, was stronger for the widely naturalized species than for the less widely naturalized ones. Our study shows that although the widely naturalized alien species were not more promiscuous than the less widely naturalized species, they took more advantage of the inorganic-N forms. This indicates that naturalization success might be partly driven by a species' ability to take advantage of increased inorganic N levels.

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Arbuscular mycorrhizal fungi improve the competitive advantage of a native plant relative to a congeneric invasive plant in growth and nutrition

Shen,

He,

Xia

et al. 2024

Ecology and Evolution

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Plant invasions severely threaten natural ecosystems, and invasive plants often outcompete native plants across various ecosystems. Arbuscular mycorrhizal (AM) fungi, serving as beneficial microorganisms for host plants, can greatly influence the competitive outcomes of invasive plants against native plants. However, it remains unclear how AM fungi alter the competitive balance between native and invasive species. A competitive experiment was conducted using an invasive Eupatorium adenophorum paired with a native congener Eupatorium lindleyanum. Specifically, both species were inoculated with (M+) or without (M−) the fungus Glomus etunicatum under intraspecific (Intra‐) and interspecific (Inter‐) competition. Plant traits were measured and analyzed regarding the growth and nutrition of both species. The results exhibited that the AM fungus significantly increased the height, diameter, biomass, C, N, and P acquisition of both the invasive E. adenophorum and the native E. lindleyanum. The root mycorrhizal colonization and the mycorrhizal dependency of native E. lindleyanum were greater than those of invasive E. adenophorum. Under M+, the Inter‐competition inhibited the growth and nutrition of invasive E. adenophorum compared to the Intra‐ competition. Further, native E. lindleyanum exhibited higher competitiveness than invasive E. adenophorum in growth and nutrition. Meanwhile, the AM fungus significantly improved the competitiveness of native E. lindleyanum over invasive E. adenophorum. In conclusion, AM fungus improved the competitive advantage of native E. lindleyanum over invasive E. adenophorum in growth and nutrition, potentially contributing to native species competitively resisting the invasion of exotic species. These findings emphasize the importance of AM fungi in helping native plants resist the invasion of exotic plants and further contribute to understanding plant invasion prevention mechanisms.

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Influences of plant interspecific competition and arbuscular mycorrhizal fungi on nitrogen form preference of an invasive plant

Cited by 15 publications

References 113 publications

Nitrogen Uptake by Two Plants in Response to Plant Competition as Regulated by Neighbor Density

Nitrogen Uptake by Two Plants in Response to Plant Competition as Regulated by Neighbor Density

Widely naturalized species are not more promiscuous in the use of different nitrogen forms, but benefit more from inorganic nitrogen

Arbuscular mycorrhizal fungi improve the competitive advantage of a native plant relative to a congeneric invasive plant in growth and nutrition

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