Influence of Arbuscular Mycorrhizal (AM) Symbiosis on Phosphorus Leaching through Soil Cores

Asghari, Hamid Reza; Chittleborough, David J.; Smith, Frank A.; Smith, Sally E.

doi:10.1007/s11104-005-1328-2

Cited by 62 publications

(43 citation statements)

References 33 publications

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“…Mycorrhizal colonization is usually coincide with AM external hyphal development in soil which leads to increase of N and P acquisition, transport and delivery to plant (Asghari et al, 2005;Johansen et al, 1993b;Leigh et al, 2009;Li et al, 2009;Tanaka and Yano, 2005). In our experiment roots of Phalaris aquatica were more colonized by AM fungi than Austrodanthonia caespitosa, which is in agreement with previous work (Tran and Cavagnaro, 2010).…”

Section: Leachate Volume and Nutrient Concentrationsupporting

confidence: 93%

Mycorrhizas effects on nutrient interception in two riparian grass species

Asghari¹,

Cavagnaro²

2014

EJSS

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Article Info Received : 08.07.2014 Accepted : 17.10.2014 Effects of arbuscular mycorrhizal (AM) fungi on plant growth and soil nutrient depletion are well known, but their roles as nutrient interceptor in riparian areas are less clear. The effects of AM fungi on growth, soil nutrient depletion and nutrient leaching were investigated in columns with two riparian grass species. Mycorrhizal and non mycorrhizal (NM) plants were grown in a mixture of riparian soil and sand (60% and 40%, w/w respectively) for 8 weeks under glasshouse conditions. Mycorrhizal colonization, AM external hyphae development, plant growth, nutrient uptake and NO3, NH4 and available P in soil and leachate were measured. Mycorrhizal fungi highly colonized roots of exotic grass Phalaris aquatica and significantly increased plant growth and nutrient uptake. Columns containing of AM Phalaris aquatica had higher levels of AM external hyphae, lower levels of NO3, NH4 and available P in soil and leachate than NM columns. Although roots of native grass Austrodanthonia caespitosa had moderately high levels of AM colonization and AM external hyphae in soil, AM inoculation had no significant effects on plant growth, soil and leachate concentration of NO3 and NH4. But AM inoculation decreased available soil P concentration in deeper soil layer and had no effects on dissolved P in leachate. Although both grass species had nearly the same biomass, results showed that leachate collected from Austrodanthonia caespitosa columns significantly had lower levels of NO3, NH4 and dissolve P than leachate from exotic Phalaris aquatica columns. Taken together, these data shows that native plant species intercept higher nutrient than exotic plant species and had no responsiveness to AM fungi related to nutrient leaching, but AM fungi play an important role in interception of nutrient in exotic plant species.

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Section: Leachate Volume and Nutrient Concentrationsupporting

confidence: 93%

Mycorrhizas effects on nutrient interception in two riparian grass species

Asghari¹,

Cavagnaro²

2014

EJSS

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“…In support of these ideas, van der Heijden (2010) detected a trend toward lower leachate volumes, in the presence of the AM community, for all six AM vs non-mycorrhizal contrasts he established. Asghari et al (2005) also demonstrated lower leachate volumes of AM colonized plants but did not control for the bigger size of the AM treatments.…”

Section: Mechanisms Of Am Fungal Involvementmentioning

confidence: 87%

Arbuscular mycorrhiza and soil nitrogen cycling

Veresoglou

Chen

Rillig

2012

Soil Biology and Biochemistry

296

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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“…In contrast, in non-metal contaminated soils a decrease in mycorrhizal colonization with soil depth was observed [33][34][35].…”

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confidence: 91%

Arbuscular mycorrhiza of Deschampsia cespitosa (Poaceae) at different soil depths in highly metal-contaminated site in southern Poland

et al. 2013

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This study presents root colonization of Deschampsia cespitosa growing in the immediate vicinity of a former Pb/Zn smelter by arbuscular mycorhizal fungi (AMF) and dark septated endophytes (DSE) at different soil depths. AMF spores and species distribution in soil profile were also assessed. Arbuscular mycorrhiza (AM) and DSE were found in D. cespitosa roots at all investigated soil levels. However, mycorrhizal colonization in topsoil was extremely low with sporadically occurring arbuscules. AM parameters: frequency of mycorrhization of root fragments (F%), intensity of root cortex colonization (M%), intensity of colonization within individual mycorrhizal roots (m%), and arbuscule abundance in the root system (A%) were markedly higher at 20–40, 40–60 cm soil levels and differed in a statistically significant manner from AM parameters from 0–10 and 10–20 cm layers. Mycorrhizal colonization was negatively correlated with bioavailable Cd, Pb and Zn concentrations. The number of AMF spores in topsoil was very low and increased with soil depth (20–40 and 40–60 cm). At the study area spores of three morphologically distinctive AMF species were found: Archaeospora trappei, Funneliformis mosseae and Scutellospora dipurpurescens. The fourth species Glomus tenue colonized roots of D. cespitosa and was observed in the root cortex at 20–40 and 40–60 soil depth, however, its spores were not found at the site.

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Influence of Arbuscular Mycorrhizal (AM) Symbiosis on Phosphorus Leaching through Soil Cores

Cited by 62 publications

References 33 publications

Mycorrhizas effects on nutrient interception in two riparian grass species

Mycorrhizas effects on nutrient interception in two riparian grass species

Arbuscular mycorrhiza and soil nitrogen cycling

Arbuscular mycorrhiza of Deschampsia cespitosa (Poaceae) at different soil depths in highly metal-contaminated site in southern Poland

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