The effect of added nitrogen and phosphorus on mycorrhizal growth response and infection in <i>Allium schoenoprasum</i>

Bååth, Erland; Spokes, J. R.

doi:10.1139/b89-402

Cited by 45 publications

(23 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Many studies show that the relative amounts of both N and P determine mycorrhizal function and support the predictions of the trade balance model (e.g. Bååth & Spokes, 1989; Sylvia & Neal, 1990; Valentine et al. , 2001; Azcón et al.…”

Section: Trade Balance and Thresholds In The Am Marketplacementioning

confidence: 69%

Resource stoichiometry elucidates the structure and function of arbuscular mycorrhizas across scales

2009

View full text Add to dashboard Cite

SummaryDespite the fact that arbuscular mycorrhizal (AM) associations are among the most ancient, abundant and important symbioses in terrestrial ecosystems, there are currently few unifying theories that can be used to help understand the factors that control their structure and function. This review explores how a stoichiometric perspective facilitates integration of three complementary ecological and evolutionary models of mycorrhizal structure and function. AM symbiotic function should be governed by the relative availability of carbon, nitrogen and phosphorus (trade balance model) and allocation to plant and fungal structures should depend on the availabilities of these resources (functional equilibrium model). Moreover, in an evolutionary framework, communities of plants and AM fungi are predicted to adapt to each other and their local soil environment (co-adaptation model). Anthropogenic enrichment of essential resources in the environment is known to impact AM symbioses. A more predictive theory of AM structure and function will help us to better understand how these impacts may influence plant communities and ecosystem properties.

show abstract

Section: Trade Balance and Thresholds In The Am Marketplacementioning

confidence: 69%

Resource stoichiometry elucidates the structure and function of arbuscular mycorrhizas across scales

2009

View full text Add to dashboard Cite

show abstract

“…N deposition also had a negative eVect on PLFA 16:1 5 when a narrower pH interval was analysed (Table 2). AM abundance is most strongly regulated by P availability to the plant, but N addition to soil in combination with good P availability has previously been found to reduce AM colonisation in pot cultures (Bååth and Spokes 1989) and AM biomass in the Weld (Johnson et al 2003). However, we could not evaluate whether P availability inXuenced the eVect of N deposition on AM in the present study, since soil P data were not available for many of the investigated sites.…”

Section: Discussionmentioning

confidence: 80%

Growth of ectomycorrhizal mycelia and composition of soil microbial communities in oak forest soils along a nitrogen deposition gradient

et al. 2007

View full text Add to dashboard Cite

Deciduous forests may respond differently from coniferous forests to the anthropogenic deposition of nitrogen (N). Since fungi, especially ectomycorrhizal (EM) fungi, are known to be negatively affected by N deposition, the effects of N deposition on the soil microbial community, total fungal biomass and mycelial growth of EM fungi were studied in oak-dominated deciduous forests along a nitrogen deposition gradient in southern Sweden. In-growth mesh bags were used to estimate the production of mycelia by EM fungi in 19 oak stands in the N deposition gradient, and the results were compared with nitrate leaching data obtained previously. Soil samples from 154 oak forest sites were analysed regarding the content of phospholipid fatty acids (PLFAs). Thirty PLFAs associated with microbes were analysed and the PLFA 18:2omega6,9 was used as an indicator to estimate the total fungal biomass. Higher N deposition (20 kg N ha(-1)y(-1) compared with 10 kg N ha(-1)y(-1)) tended to reduce EM mycelial growth. The total soil fungal biomass was not affected by N deposition or soil pH, while the PLFA 16:1omega5, a biomarker for arbuscular mycorrhizal (AM) fungi, was negatively affected by N deposition, but also positively correlated to soil pH. Other PLFAs positively affected by soil pH were, e.g., i14:0, a15:0, 16:1omega9, a17:0 and 18:1omega7, while some were negatively affected by pH, such as i15:0, 16:1omega7t, 10Me17:0 and cy19:0. In addition, N deposition had an effect on the PLFAs 16:1omega7c and 16:1omega9 (negatively) and cy19:0 (positively). The production of EM mycelia is probably more sensitive to N deposition than total fungal biomass according to the fungal biomarker PLFA 18:2omega6,9. Low amounts of EM mycelia covaried with increased nitrate leaching, suggesting that EM mycelia possibly play an important role in forest soil N retention at increased N input.

show abstract

“…Mosse & Phillips (1971) found that, at high P concentrations, roots were colonized only when the medium lacked N. Nevertheless, they did not consider that AMF may be needed for N nutrition. A later connection between P and N availability was established by Sylvia & Neal (1990), who showed that under N‐limiting conditions, P addition had no effect on mycorrhizal colonization whereas, when a sufficient amount of N was supplied, colonization was suppressed by the addition of P. Also Bååth & Spokes (1989) found that only a combination of high P and N concentrations led to reduced mycorrhization.…”

Section: Discussionmentioning

confidence: 97%

Nitrogen supply affects arbuscular mycorrhizal colonization of Artemisia vulgaris in a phosphate‐polluted field site

et al. 2005

View full text Add to dashboard Cite

Summary• Root colonization by arbuscular mycorrhizal fungi (AMF) was investigated in industrially polluted grassland characterized by exceptionally high phosphorus levels (up to 120 g kg − 1 soil).• Along a pollution-induced nitrogen gradient, soil and tissue element concentrations of Artemisia vulgaris plants and their mycorrhizal status were determined. Additionally, we compared mycorrhization rates and above-ground biomass of A. vulgaris at N-fertilized and control plots in the N-poor area.• Despite high soil and tissue P concentrations, plants from N-deficient plots, which were characterized by low tissue N concentrations and N : P ratios, were strongly colonized by AMF, whereas at a plot with comparable P levels, but higher soil and plant N concentrations and N : P ratios, mycorrhization rates were significantly lower. Correlation analyses revealed a negative relationship between percentage root colonization of A. vulgaris by AMF and both tissue N concentration and N : P ratio. Accordingly, in the fertilization experiment, control plants had higher mycorrhization rates than N-fertilized plants, whereas the species attained higher biomass at Nfertilized plots.• The results suggest that N deficiency stimulates root colonization by AMF in this extraordinarily P-rich field site.

show abstract

The effect of added nitrogen and phosphorus on mycorrhizal growth response and infection in Allium schoenoprasum

Cited by 45 publications

References 15 publications

Resource stoichiometry elucidates the structure and function of arbuscular mycorrhizas across scales

Resource stoichiometry elucidates the structure and function of arbuscular mycorrhizas across scales

Growth of ectomycorrhizal mycelia and composition of soil microbial communities in oak forest soils along a nitrogen deposition gradient

Nitrogen supply affects arbuscular mycorrhizal colonization of Artemisia vulgaris in a phosphate‐polluted field site

Contact Info

Product

Resources

About