Molecular diversity of arbuscular mycorrhizal fungi colonising arable crops

Daniell, Tim J.

doi:10.1016/s0168-6496(01)00134-9

Cited by 112 publications

(209 citation statements)

References 22 publications

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“…The Glomeraceae has been shown to have the ability to colonize new roots via their mycelium or colonized root fragments (Tommerup and Abbott, 1981) and can do so at a higher sporulation rate and intensity than species from Acaulosporaceae and Gigasporaceae (Hart and Reader, 2002). Similar to present study, domination of the AMF communities by Glomus species has also been reported in forest (Husband et al, 2002a,b;Öpik et al, 2003), grassland (Vandenkoornhuyse et al, 2002a;Scheublin et al, 2004;Santos et al, 2006), wetland (Wirsel, 2004) and agricultural (Daniell et al, 2001;Hijri et al, 2006) soils.…”

Section: Amf Diversity In the Temperate Steppesupporting

confidence: 87%

“…This suggests either a site-dependent response to N, or functional diversity within this species. DL-Glo15, which can be assigned to F. mosseae can also be considered a generalist fungal species since it is very common in various ecosystems, including temperate arable fields (Daniell et al, 2001), tropical forests (Husband et al, 2002a,b), seminatural grasslands (Vandenkoornhuyse et al, 2002a) and wetlands (Wirsel, 2004). However, only three sequences of this species were detected in this study, suggesting that this species was exiguous in the research area.…”

Section: Effects Of Fertilization On Amf Abundance and Community Strumentioning

confidence: 67%

“…Furthermore, most studies have focused on AMF diversity either in roots (Helgason et al, 1999;Daniell et al, 2001;Vandenkoornhuyse et al, 2002a) or in soils (Alguacil et al, 2012;Lin et al, 2012), and few studies examined both simultaneously. However, the overlap between the AMF species composition in soil and the functionally active AMF communities within mycorrhizal roots has been shown to be relatively low (Clapp et al, 1995;Hempel et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

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Six-year fertilization modifies the biodiversity of arbuscular mycorrhizal fungi in a temperate steppe in Inner Mongolia

Chen

Zhang

et al. 2014

Soil Biology and Biochemistry

119

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a b s t r a c tArbuscular mycorrhizal fungi (AMF) play key roles in supporting ecosystem sustainability, stability and function, but little is known about how fertilization practices affect AMF abundance and community composition in the grassland ecosystems. In the present study, a field trial was established to examine the effects of 6 years of nitrogen (N) and phosphorus (P) fertilization on the community structure of AMF both in soils and plant roots in a typical temperate steppe in Inner Mongolia, northern China. The AMF small-subunit (SSU) rRNA genes were subjected to PCR, cloning, sequencing, and phylogenetic analyses. A total of 1554 sequenced SSU rRNA clones, including 919 clones from the soil and 635 clones from the roots, were analyzed. The 31 AMF sequence types belonging to Glomeromycota were identified: 17 to Glomus group A and 14 to Glomus group B. The experimental results indicated that N fertilization significantly altered the AMF communities in both soils and mixed roots but had no obvious influence on AMF abundance. However, P fertilization showed no significant influence on the AMF community structure, but induced a significant decrease in mycorrhizal colonization rate, arbuscule colonization and hyphal length density. Furthermore, N and P application showed significant interactions in affecting AMF species compositions in soils but not in roots. Generally the AMF diversity in the soil was higher than that in the roots. The study suggested that N fertilization predominantly altered AMF species composition, while P fertilization influenced AMF abundance in this steppe.

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Section: Amf Diversity In the Temperate Steppesupporting

confidence: 87%

Section: Effects Of Fertilization On Amf Abundance and Community Strumentioning

confidence: 67%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Six-year fertilization modifies the biodiversity of arbuscular mycorrhizal fungi in a temperate steppe in Inner Mongolia

Chen

Zhang

et al. 2014

Soil Biology and Biochemistry

119

View full text Add to dashboard Cite

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“…The fact that all AMF taxa used in this study belonged to the same genus (Glomus) may, thus, explain why there was no effect of AMF diversity on plant productivity. European arable soils subjected to regular ploughing are regularly dominated by members of the Glomeraceae (Daniell et al 2001;Hijri et al 2006;Alguacil et al 2008;Verbruggen et al unpublished results). Hence, the use of only Glomus species in our experiment is comparable to a situation regularly found in the field.…”

Section: Discussionmentioning

confidence: 98%

Mycorrhizal fungi suppress aggressive agricultural weeds

et al. 2009

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Plant growth responses to arbuscular mycorrhizal fungi (AMF) are highly variable, ranging from mutualism in a wide range of plants, to antagonism in some non-mycorrhizal plant species and plants characteristic of disturbed environments. Many agricultural weeds are non mycorrhizal or originate from ruderal environments where AMF are rare or absent. This led us to hypothesize that AMF may suppress weed growth, a mycorrhizal attribute which has hardly been considered. We investigated the impact of AMF and AMF diversity (three versus one AMF taxon) on weed growth in experimental microcosms where a crop (sunflower) was grown together with six widespread weed species. The presence of AMF reduced total weed biomass with 47% in microcosms where weeds were grown together with sunflower and with 25% in microcosms where weeds were grown alone. The biomass of two out of six weed species was significantly reduced by AMF (−66% & −59%) while the biomass of the four remaining weed species was only slightly reduced (−20% to −37%). Sunflower productivity was not influenced by AMF or AMF diversity. However, sunflower benefitted from AMF via enhanced phosphorus nutrition. The results indicate that the stimulation of arbuscular mycorrhizal fungi in agro-ecosystems may suppress some aggressive weeds.

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“…Alternatively, plants in the sterile soil treatment may have been of increased quality to aphids compared with those on non-sterile soil due to compromised plant defences or more rapid onset of senescence, which can increase the flux of nutrients into the phloem to the benefit of phloem-feeding herbivores [24]. By contrast, no significant difference was observed in total plant biomass between the cultivated and uncultivated soil treatments, despite the fact that the disruptive effects of tillage [10,11] were likely to have reduced microbial diversity in the cultivated soil [25]. Although previous work [26] has demonstrated variability in total plant responses to soil community diversity, cultivated plants may be less likely to respond to variation in soil microbial communities [27].…”

Section: Discussionmentioning

confidence: 99%

Unpredicted impacts of insect endosymbionts on interactions between soil organisms, plants and aphids

2013

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Ecologically significant symbiotic associations are frequently studied in isolation, but such studies of two-way interactions cannot always predict the responses of organisms in a community setting. To explore this issue, we adopt a community approach to examine the role of plant-microbial and insect-microbial symbioses in modulating a plant-herbivore interaction. Potato plants were grown under glass in controlled conditions and subjected to feeding from the potato aphid Macrosiphum euphorbiae. By comparing plant growth in sterile, uncultivated and cultivated soils and the performance of M. euphorbiae clones with and without the facultative endosymbiont Hamiltonella defensa, we provide evidence for complex indirect interactions between insect-and plant-microbial systems. Plant biomass responded positively to the live soil treatments, on average increasing by 15% relative to sterile soil, while aphid feeding produced shifts (increases in stem biomass and reductions in stolon biomass) in plant resource allocation irrespective of soil treatment. Aphid fecundity also responded to soil treatment with aphids on sterile soil exhibiting higher fecundities than those in the uncultivated treatment. The relative allocation of biomass to roots was reduced in the presence of aphids harbouring H. defensa compared with plants inoculated with H. defensa-free aphids and aphid-free control plants. This study provides evidence for the potential of plant and insect symbionts to shift the dynamics of plant-herbivore interactions.

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Molecular diversity of arbuscular mycorrhizal fungi colonising arable crops

Cited by 112 publications

References 22 publications

Six-year fertilization modifies the biodiversity of arbuscular mycorrhizal fungi in a temperate steppe in Inner Mongolia

Six-year fertilization modifies the biodiversity of arbuscular mycorrhizal fungi in a temperate steppe in Inner Mongolia

Mycorrhizal fungi suppress aggressive agricultural weeds

Unpredicted impacts of insect endosymbionts on interactions between soil organisms, plants and aphids

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