Effects of Jatopha curcas L. plantation on soil bacterial and fungal communities

Dieng, Amadou; Ndoye, Ibrahima; Duponnois, Robin; Baudoin, Ezékiel

doi:10.1016/j.soilbio.2014.01.029

Cited by 15 publications

(13 citation statements)

References 55 publications

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“…Soil changes inherited from J. curcas cultivation in the same sites as those of this study triggered drastic shifts in the genetic structure of the mycorrhizal community, as depicted by soil DNA-based molecular fingerprinting (Dieng et al, 2014a). Our present data unambiguously demonstrate that these qualitative effects are also found at the scale of root mycorrhizal community composition, whatever the trap culture.…”

Section: Mycorrhizal Symbiosis Was Not Disrupted Despite Drastic and supporting

confidence: 76%

“…Sites location, agronomic management, climatic conditions, soil characteristics (Alfisol) and sampling were presented elsewhere (Dieng et al, 2014a). Briefly, smallholders growing J. curcas were located in West Senegal.…”

Section: Field Sites and Soil Sampling Designmentioning

confidence: 99%

“…In a previous study (Dieng et al, 2014a), we analyzed the genetic structure of the soil mycorrhizal communities in 3 Senegalese J. curcas plantations and their adjacent fallow fields. Total DNA was extracted from soil samples representative of each of those 6 fields to generate genetic fingerprints of the Glomeromycota 18S rRNA marker gene.…”

Section: Introductionmentioning

confidence: 99%

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Cultivation of Jatropha curcas L. leads to pronounced mycorrhizal community differences

Dieng

Duponnois

Ndoye³

et al. 2015

Soil Biology and Biochemistry

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Section: Mycorrhizal Symbiosis Was Not Disrupted Despite Drastic and supporting

confidence: 76%

Section: Field Sites and Soil Sampling Designmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Cultivation of Jatropha curcas L. leads to pronounced mycorrhizal community differences

Dieng

Duponnois

Ndoye³

et al. 2015

Soil Biology and Biochemistry

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“…The soil microbial community at location BUI (loamy sand: low organic matter and moisture content) responded to a different subset of substrates (alanine, citric acid, and, to a lesser extent, fumaric acid and glucose), again without differences between rhizosphere and bulk soil. Our results show that the MicroResp TM methodology was effective in differentiating distinct microbial rhizosphere communities, as found by Knox et al (2014) and Dieng et al (2014). The absence of differences between rhizosphere and bulk soil suggests that either the microbial communities were not significantly affected by the potato roots or that the methodology was not sensitive enough to detect relatively small effects on the microbial activity.…”

Section: Discussionsupporting

confidence: 49%

Effects of GM potato Modena on soil microbial activity and litter decomposition fall within the range of effects found for two conventional cultivars

et al. 2015

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Plant roots have a profound effect on soil microbial activity, particularly in the rhizosphere. Hence, it is important to understand the potential effects of genetically modified (GM) crops on soil microbial activity and related processes such as litter decomposition. In this study, we compared the effects of GM potato Modena on soil microbial activity and carbon (C) and nitrogen (N) mineralization to effects induced by Modena's parental isoline (Karnico) and a conventional potato cultivar (Aventra). A field experiment was conducted at two sites to assess microbial catabolic diversity (using MicroResp TM ) in the rhizosphere and in bulk soil, during flowering and senescence of the potato plants. In a laboratory experiment with soil and potato litter from the field experiment, we investigated whether the cultivars had modified the activity of soil microbial communities to such an extent that this affected C and N mineralization. Results of the field experiment showed no GM-induced effects on microbial catabolic diversity, while effects of field site location and sampling date were significant. Multivariate analysis including plant traits and soil characteristics revealed that microbial catabolic activities in rhizosphere soil were strongly correlated with soil organic matter and tuber sucrose content, whereas in bulk soil, they were primarily correlated with soil moisture. In the laboratory experiment, we found that Modena induced a Bhomefield advantage^in N mineralization, yet this effect was inconsistent across locations and was also observed for other cultivars. Based on our data and results from previous studies, we conclude that the effects of GM cultivar Modena on soil microbial activity and litter decomposition fall within the normal range of effects found for conventional potato cultivars.

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“…Polymerase chain reaction coupled with denaturing gradient gel electrophoresis (PCR-DGGE) has been widely used to determine the species richness and structure of fungal communities in a variety of environments (Sigler and Turco, 2002;Costa et al, 2006;Yu et al, 2013;Zhang et al, 2013;Dieng et al, 2014). Primarily, this technique is carried out by amplifying specific sequences of interest, such as ribosomal RNA (rRNA) genes (Cahyani et al, 2004;Zhao et al, 2012;Yan et al, 2013;Yoshitake et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Effect of karst rocky desertification on soil fungal communities in Southwest China

Wang¹,

Bt²,

Chen³

et al. 2016

Genet. Mol. Res.

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ABSTRACT. Karst mountainous ecosystems are associated with karst rocky desertification (KRD), which can greatly impact soil structure and function. Despite the importance of soil microbes as a major factor maintaining ecosystem stability, we know little about the effect on soil fungal communities of KRD in karst regions. We investigated this relationship across a gradient of KRD soils from Guizhou, China by polymerase chain reaction and denaturing gradient gel electrophoresis (PCR-DGGE). Fungal diversity indices (Shannon-Wiener, richness, and evenness) significantly differed (P < 0.05) based on KRD severity, being lowest in moderately affected areas. Cluster analysis showed that the five sites examined clustered into two main groups according to KRD grade (high and low). Moreover, a homology search using sequences recovered from PCR-DGGE bands showed that the dominant fungi in each community varied remarkably, and included Aspergillus, Aphanoascus, Blastomyces, Fusarium, Glomus, Geomyces, Gibberella, Mortierella, Tetracladium, and Tumularia species, and an unclassified group. In conclusion, these findings demonstrate that KRD has a significant impact on soil fungal communities.

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Effects of Jatopha curcas L. plantation on soil bacterial and fungal communities

Cited by 15 publications

References 55 publications

Cultivation of Jatropha curcas L. leads to pronounced mycorrhizal community differences

Cultivation of Jatropha curcas L. leads to pronounced mycorrhizal community differences

Effects of GM potato Modena on soil microbial activity and litter decomposition fall within the range of effects found for two conventional cultivars

Effect of karst rocky desertification on soil fungal communities in Southwest China

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