Potential Nitrification as an Indicator of Preferential Uptake of Ammonium or Nitrate by Plants in an Oak Woodland Understorey

Olsson, M O; Falkengren‐Grerup, Ursula

doi:10.1006/anbo.1999.1075

Cited by 36 publications

(20 citation statements)

References 45 publications

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“…Plant species identity is a well known regulator of N-cycling rates in the rhizosphere (e.g. Olsson and Falgengren-Grerup, 2000;Van der Krift and Berendse, 2001;Veresoglou et al, 2011b) and thus AM fungusinduced changes in plant community compositional should impact the N-cycle.…”

Section: Plant Community Level Shiftsmentioning

confidence: 99%

Arbuscular mycorrhiza and soil nitrogen cycling

Veresoglou

Chen

Rillig

2012

Soil Biology and Biochemistry

288

153

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a b s t r a c tNitrogen is a major nutrient that frequently limits primary productivity in terrestrial ecosystems. Therefore, the physiological responses of plants to soil nitrogen (N) availability have been extensively investigated, and the study of the soil N-cycle has become an important component of ecosystem ecology and biogeochemistry. The bulk of the literature in these areas has, however, overlooked the fact that most plants form mycorrhizal associations, and that nutrient uptake is therefore mediated by mycorrhizal fungi. It is well established that ecto-and ericoid mycorrhizas influence N nutrition of plants, but roles of arbuscular mycorrhizas in N nutrition are less well established; perhaps even more importantly, current conceptual models ignore possible influences of arbuscular mycorrhizal (AM) fungi on N-cycling processes. We review evidence for the interaction between the AM symbiosis with microbes and processes involved in soil N-cycling. We show that to date investigations have rather poorly addressed such interactions and discuss possible reasons for this. We outline mechanisms that could potentially operate with regards to AM fungal e N-cycling interactions, discuss experimental designs aimed at studying these, and conclude by pointing out priorities for future research.

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Section: Plant Community Level Shiftsmentioning

confidence: 99%

Arbuscular mycorrhiza and soil nitrogen cycling

Veresoglou

Chen

Rillig

2012

Soil Biology and Biochemistry

288

153

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“…It is well understood that plant species differ in their ability to assimilate nitrate and ammonium (Olsson and Falkengren-Grerup 2000;de Graaf et al1998). For example, when ammonium is the sole N source available, Arabidopsis thaliana plants experience growth retardation as seedlings, before the full onset of photosynthetic activity (Hoffmann et al 2007).…”

Section: Introductionmentioning

confidence: 99%

Flexible N uptake and assimilation mechanisms may assist biological invasion by Alliaria petiolata

Hewins

Hyatt

2009

Biol Invasions

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Although nitrogen has historically limited terrestrial plant productivity in the northern hemisphere, accelerated industrial activity is changing the availability of N, with consequences for ecosystem properties including altered susceptibility to biological invasion. Alliaria petiolata (Bieb.) Cavara & Grande is an increasingly problematic invader in forests of eastern North America. Population growth rate of this species is especially high in N-rich habitats, and it produces a variety of N-based compounds that have been shown to interfere with the growth and reproduction of native plants. To investigate how increases and shifts in forms of N will impact A. petiolata, seedlings were transplanted to the greenhouse from the field and grown in sand culture. We applied three concentrations of N (0.25, 1 and 2 mM) using five different ratios of NH 4 ? and NO 3 -(100/0, 75/25, 50/50, 25/75, 0/100) in a crossed design to yield fifteen different treatments. Plants were measured throughout the growing season and a final harvest yielded measures of biomass and tissue quality. Plant growth increased significantly in response to increased concentration of total N. These increases were similar for all combinations of N. This flexibility in uptake ability may facilitate the invasion of this species, not only by increasing the range of habitats A. petiolata can occupy but also by enhancing N uptake that can lead to the production of secondary compounds disrupting other species' belowground mutualisms. We suggest that this species' ability to respond rapidly to changes in N availability, regardless of its form, may modify competitive interactions with natives and intensify its negative impacts.

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“…This could be the reason why plant species were better indicators of %Nitrif than of PNM. If the plant community composition is strongly influenced by percent nitrification, individual plant species may directly influence net nitrification in the rhizosphere (Olsson and Falkengren-Grerup, 2000). As an illustration, let's focus now on species which were indicators of high %Nitrif at low pH.…”

Section: N Mineralization Percent Nitrification and Species Compositmentioning

confidence: 99%

Comparing indicators of N status of 50 beech stands (Fagus sylvatica L.) in northeastern France

Andrianarisoa¹,

Zeller²,

Dupouey

et al. 2009

Forest Ecology and Management

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Potential Nitrification as an Indicator of Preferential Uptake of Ammonium or Nitrate by Plants in an Oak Woodland Understorey

Cited by 36 publications

References 45 publications

Arbuscular mycorrhiza and soil nitrogen cycling

Arbuscular mycorrhiza and soil nitrogen cycling

Flexible N uptake and assimilation mechanisms may assist biological invasion by Alliaria petiolata

Comparing indicators of N status of 50 beech stands (Fagus sylvatica L.) in northeastern France

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