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Corkidi, Lea; Rowland, Diane; Johnson, Nancy Collins; Allen, Edith B.

doi:10.1023/a:1015792204633

Cited by 143 publications

(30 citation statements)

References 56 publications

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“…Typically a reduction in mycorrhizal colonization is expected with N fertilization, as plants are able to directly take up sufficient N without the added carbon cost of mycorrhizal association (Smith and Read 2010). However, chronic N addition, may select for more aggressive AMF fungi that maintain high rates of colonization even when soil N availability is high (Corkidi et al 2002;Johnson et al 1997). While natives in this system may be negatively impacted by these AM fungal strains (Sigüenza et al 2006a), invasives, such as Bromus may benefit, as demonstrated here.…”

Section: Discussionmentioning

confidence: 61%

Nitrogen enrichment contributes to positive responses to soil microbial communities in three invasive plant species

Valliere

Allen

2016

Biol Invasions

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Increased resource availability and feedbacks with soil biota have both been invoked as potential mechanisms of plant invasion. Nitrogen (N) deposition can enhance invasion in some ecosystems, and this could be the result of increased soil N availability as well as shifts in soil biota. In a twophase, full-factorial greenhouse experiment, we tested effects of N availability and N-impacted soil communities on growth responses of three Mediterranean plant species invasive in California: Bromus diandrus, Centaurea melitensis, and Hirschfeldia incana. In the first phase, plants were grown individually in pots and inoculated with sterile soil, soil from control field plots or soil from high N addition plots, and with or without supplemental N. In the second phase, we grew the same species in soils conditioned in the first phase. We hypothesized growth responses would differ across species due to species-specific relationships with soil biota, but overall increased N availability and N-impacted soil communities would enhance plant growth. In the first phase, Centaurea had the greatest growth response when inoculated with N-impacted soil, while Bromus and Hirschfeldia performed best in low N soil communities. However, in phase two all species exhibited positive growth responses in N-impacted soil communities under high N availability. While species may differ in responses to soil biota and N, growth responses to soils conditioned by conspecifics appear to be most positive in all species under high N availability and/or in soil communities previously impacted by simulated N deposition. Our results suggest N deposition could facilitate invasion due to direct impacts of soil N enrichment on plant growth, as well as through feedbacks with the soil microbial community.

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Section: Discussionmentioning

confidence: 61%

Nitrogen enrichment contributes to positive responses to soil microbial communities in three invasive plant species

Valliere

Allen

2016

Biol Invasions

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“…The highest AMF root colonization was obtained with no-till without N fertilization (NTN0, 35% of root length colonized by AMF) and the lowest with conventional tillage with N fertilization (CTNX, 2%) ( Figure 1A). It is known that soil disturbance and N enrichment resulting from plowing [8,9] and N fertilization [6] reduce the ability of plants and AMF to form mycorrhizas. Moreover, such a reduction seems to be greater when both plowing and N fertilization are used.…”

Section: Resultsmentioning

confidence: 99%

“…This could explain why in the present study there were larger amounts of AMF in the roots following NT without any N fertilization (N0). It is also well known that mycorrhizal functioning is strongly influenced both by plant nutrient status and by soil nutrient availability [6]. When nutrient availability is high, root exudate composition can be qualitatively modified, thus decreasing fungal colonization.…”

Section: Resultsmentioning

confidence: 99%

“…Such symbiotic associations significantly enhance the uptake capacity of plants for nutrients [2,3] beyond the depletion zone surrounding a root, especially for the inorganic phosphate ion and the ammonium ion [4]. In current intensive agricultural systems, soil management practices may be detrimental to an efficient fungal-plant symbiotic interaction [5], notably nitrogen (N) fertilization [6], which at the same time may reduce the diversity of fungal communities [7]. Conventional tillage (CT) causes a physical disruption of the hyphal network in the soil, thus reducing the density of propagules in the rooting zone [8].…”

Section: Introductionmentioning

confidence: 99%

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In Winter Wheat, No-Till Increases Mycorrhizal Colonization thus Reducing the Need for Nitrogen Fertilization

et al. 2016

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Arbuscular mycorrhizal fungi (AMF) play a major role in the uptake of nutrients by agricultural plants. Nevertheless, some agricultural practices can interrupt fungal-plant signaling and thus impede the establishment of the mycorrhizal symbiosis. A field experiment performed over a 5-year period demonstrated that both the absence of tillage and of nitrogen (N) fertilization improved AMF colonization of wheat roots. Moreover, under no-till conditions, N uptake and aboveground biomass production did not vary significantly between N-fertilized and N-unfertilized plots. In contrast, both N uptake and above ground biomass were much lower when N fertilizer was not added during conventional tillage. This finding strongly suggests that for wheat, no-till farming is a sustainable agricultural system that allows a gradual reduction in N fertilizer use by promoting AMF functionality and at the same time increasing N uptake.

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“…Soil properties influence functionality in AM fungi (Frey and Ellis 1997; Hamel et al 1997; Carrenho et al 2007; Arines et al 1988; Warnock et al 2007; Mechri et al 2008). Different AM strains have different ability to function in different soil environments as shown by different AM fungal community composition (Corkidi et al 2002; He et al 2004, Fitzsimons et al 2008), development (Abbott and Robson 1991), sporulation (Baum et al 2002), and function (Karasawa et al 2001) in different soils.…”

Section: Discussionmentioning

confidence: 99%

Soil–strain compatibility: the key to effective use of arbuscular mycorrhizal inoculants?

et al. 2010

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Consistency of response to arbuscular mycorrhizal (AM) inoculation is required for efficient use of AM fungi in plant production. Here, we found that the response triggered in plants by an AM strain depends on the properties of the soil where it is introduced. Two data sets from 130 different experiments assessing the outcome of a total of 548 replicated single inoculation trials conducted either in soils with a history of (1) high input agriculture (HIA; 343 replicated trials) or (2) in more pristine soils from coffee plantations (CA; 205 replicated trials) were examined. Plant response to inoculation with different AM strains in CA soils planted with coffee was related to soil properties associated with soil types. The strains Glomus fasciculatum-like and Glomus etunicatum-like were particularly performant in soil relatively rich in nutrients and organic matter. Paraglomus occultum and Glomus mosseae-like performed best in relatively poor soils, and G. mosseae and Glomus manihotis did best in soils of medium fertility. Acaulospora scrobiculata, Diversispora spurca, G. mosseae-like, G. mosseae and P. occultum stimulated coffee growth best in Chromic, Eutric Alluvial Cambisol, G. fasciculatum-like and G. etunicatum-like in Calcaric Cambisol and G. manihotis, in Chromic, Eutric Cambisols. Acaulospora scrobiculata and Diversispora spurca strains performed best in Chromic Alisols and Rodic Ferralsols. There was no significant relationship between plant response to AM fungal strains and soil properties in the HIA soil data set, may be due to variation induced by the use of different host plant species and to modification of soil properties by a history of intensive production. Consideration of the performance of AM fungal strains in target soil environments may well be the key for efficient management of the AM symbiosis in plant production.

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Untitled

Cited by 143 publications

References 56 publications

Nitrogen enrichment contributes to positive responses to soil microbial communities in three invasive plant species

Nitrogen enrichment contributes to positive responses to soil microbial communities in three invasive plant species

In Winter Wheat, No-Till Increases Mycorrhizal Colonization thus Reducing the Need for Nitrogen Fertilization

Soil–strain compatibility: the key to effective use of arbuscular mycorrhizal inoculants?

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