Impact of plant species grown as monocultures on sporulation and root colonization by native arbuscular mycorrhizal fungi in potato

Bharadwaj, Dharam Parkash; Lundquist, Per-Olof; Alström, Sadhna

doi:10.1016/j.apsoil.2006.04.003

Cited by 25 publications

(22 citation statements)

References 40 publications

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“…The number of EP under T1 and T3 was significantly lower than under T2 (T1-T3<T2) (Figure 3b). Our EP data under WS are consistent with the values reported by several authors, which measured such parameter assessing the AMF inoculum potential under shrubs, wild and cultivated plant species from semiarid ecosystem to boreal grasslands (Requena et al, 2001;Bharadwaj et al, 2007). Besides, EP values similar to those reported, here, under SRF were observed for different AMF inocula on several plant species (Liu and Luo, 1994).…”

Section: Arbuscular Mycorrhizal Fungi Measurementssupporting

confidence: 81%

Changes in soil quality following poplar short-rotation forestry under different cutting cycles

Bene

Pellegrino²,

Tozzini³

et al. 2011

Ital J Agronomy

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In the last decade, the change of energy concept induced by global warming and fossil fuel depletion together with the advances in agriculture towards a multifunctional and a more sustainable use of rural areas promoted the development of biomass crops. In this regard, Populus is largely utilised in short-rotation forestry (SRF), as it is known to be a fast-growing tree, producing large yields and having a high energy potential. Most studies focused on economic-productive and energetic aspects of Populus plantations, whereas their impact on soil quality and health have been poorly investigated. In this study, the main soil chemical parameters, microbial biomass and activity were assessed aiming at evaluating the impact of Populus SRF under one, two and three-year cutting cycles (T1, T2 and T3) in comparison with an intensive food cropping system (wheat-soybean rotation, WS). In addition, arbuscular mycorrhizal (AM) fungal inoculum potential was measured using root colonisation (RC) and number of entry points (EP). In the 0-10 cm soil depth, pH, phosphorus (P), total nitrogen (N) and soil organic carbon (SOC) were significantly affected by the management. In comparison with WS, Populus SRF treatments produced significant pH decreases together with N and SOC increases, these last ones ranging from 11% to 34% and from 21% to 57%, respectively. Under T3 soil pH decreased of 0.25 units, while P, N and SOC increased of 10%, 34% and 57%, respectively, in comparison with WS. Microbial biomass and soil respiration under SRF showed also mean increases of 71% and 17%, respectively. Under SRF treatments, Lolium perenne, commonly observed in all field plots, was more than twofold colonised by AM fungi in comparison with WS, while the number of EP, observed on Lactuca sativa used as a test plant, showed values ranging from 8 to 21 times higher. The present study shows the potential of a Populus SRF to improve soil chemical, biochemical and biological quality parameters in comparison with an intensive food cropping system.

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Section: Arbuscular Mycorrhizal Fungi Measurementssupporting

confidence: 81%

Changes in soil quality following poplar short-rotation forestry under different cutting cycles

Bene

Pellegrino²,

Tozzini³

et al. 2011

Ital J Agronomy

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“…In previous studies, F. mosseae was the only species found colonizing potato roots in soil-trap cultures (Bharadwaj et al 2007) and R. irregularis (as BGlomus intraradices^) was reported as the preferential colonizer of potatoes in an Italian agricultural field at low altitude (85 mamsl) (Cesaro et al 2008). In the Andean region, surprisingly the potato roots colonizers detected in highest relative abundance and frequency were two unknown Acaulospora spp.…”

Section: Amf Species Associated With Potatomentioning

confidence: 99%

A conserved arbuscular mycorrhizal fungal core-species community colonizes potato roots in the Andes

Senés‐Guerrero

Schüßler

2015

Fungal Diversity

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Plant-symbiotic arbuscular mycorrhizal fungi (AMF) are of high global ecological and economic importance, but describing environmental communities of AMF at the species level remains a challenge, despite the need to understand AMF-plant preferences and to apply AMF in sustainable agriculture. Here, the potato-associated AMF species community composition was assessed for three Andean countries along an altitudinal gradient and at different plant stages, by using 454 GS-FLX+ sequencing of a 760 bp LSU rRNA gene PCR amplicon. Two methods were compared: defining OTUs based on a simple sequence similarity threshold, or affiliating reference sequences to species based on a high throughput phylogenetic annotation approach using an evolutionary placement algorithm (EPA). The EPA-based approach was not only more precise, but also fundamental to robustly unveil the AMF species community composition. The principal advantage of this approach was also demonstrated by using artificially constructed datasets based on validated public database sequences. The affiliation of sequence reads to species using phylogenetic annotation revealed a surprisingly conserved AMF core-species community structure in Andean potatoes, regardless of different plant stages and environmental factors. In total, 41 species were detected and in some cases more than 25 species were found colonizing an individual root system. Acaulospora species were identified as dominant colonizers, co-occurring with Cetraspora nodosa and certain Claroideoglomus and Rhizophagus species in most potato root samples.

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“…The influence of AMF species on the potato response to P nutrition (25,26) and the effect on tuber yield and size (9) or on productivity (27) have been analyzed previously. Also, potato plants were used as trap cultures in order to study plants that, in crop rotation, could be used to enhance potato AM fungal inocula (5). However, to our knowledge, no data are available about the host specificities of AM fungal species with regard to potato plants.…”

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confidence: 99%

Preferential Colonization ofSolanum tuberosumL. Roots by the FungusGlomus intraradicesin Arable Soil of a Potato Farming Area

Cesaro

Tuinen

Copetta

et al. 2008

Appl Environ Microbiol

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The symbiosis between plant roots and arbuscular mycorrhizal (AM) fungi has been shown to affect both the diversity and productivity of agricultural communities. In this study, we characterized the AM fungal communities of Solanum tuberosum L. (potato) roots and of the bulk soil in two nearby areas of northern Italy, in order to verify if land use practices had selected any particular AM fungus with specificity to potato plants. The AM fungal large-subunit (LSU) rRNA genes were subjected to nested PCR, cloning, sequencing, and phylogenetic analyses. One hundred eighty-three LSU rRNA sequences were analyzed, and eight monophyletic ribotypes, belonging to Glomus groups A and B, were identified. AM fungal communities differed between bulk soil and potato roots, as one AM fungal ribotype, corresponding to Glomus intraradices, was much more frequent in potato roots than in soils (accounting for more than 90% of sequences from potato samples and less than 10% of sequences from soil samples). A semiquantitative heminested PCR with specific primers was used to confirm and quantify the AM fungal abundance observed by cloning. Overall results concerning the biodiversity of AM fungal communities in roots and in bulk soils from the two studied areas suggested that potato roots were preferentially colonized by one AM fungal species, G. intraradices.Arbuscular mycorrhizal fungi (AMF) are obligate biotrophs, forming mutualistic relationships with a broad range of host plant species (42). Arbuscular mycorrhizal (AM) associations are generally considered to be nonspecific, as the same AMF species is able to colonize the roots of different host plants, which in turn can be colonized by various AMF species (13, 38, 52). However, results from some studies show that preferential associations between plants and AMF may exist (4,7,13,32,56), and reciprocal interactions between AMF and the plant community, based on reciprocal feedback, have been proposed (2,3,4). In particular, differential responses by plant species to individual isolates and species of AMF (43), leading to variations in the plant community composition and productivity and depending on the diversity and identity of the AMF (23, 51), have been observed previously.Although most plants used in agriculture and horticulture form arbuscular mycorrhizae, agricultural management practices may affect the composition and diversity of AMF communities, as well as spore and mycelium densities, in both temperate and tropical agroecosystems (24). In general, agricultural practices have a negative impact on the AM association (8, 14); AMF abundance is reduced by phosphorus (P) fertilization (14, 33) and by crop cultivation, due mainly to either mechanical disturbance by tillage or a change of host plants in crop rotation systems. Moreover, seasonal variations in the abundance of AMF in agricultural soil have been observed (22).Few data are available concerning potato plants and AMF. The influence of AMF species on the potato response to P nutrition (25, 26) and the effect on tuber yi...

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Impact of plant species grown as monocultures on sporulation and root colonization by native arbuscular mycorrhizal fungi in potato

Cited by 25 publications

References 40 publications

Changes in soil quality following poplar short-rotation forestry under different cutting cycles

Changes in soil quality following poplar short-rotation forestry under different cutting cycles

A conserved arbuscular mycorrhizal fungal core-species community colonizes potato roots in the Andes

Preferential Colonization ofSolanum tuberosumL. Roots by the FungusGlomus intraradicesin Arable Soil of a Potato Farming Area

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