Dispersal of arbuscular mycorrhizal fungi and dark septate endophytes by Ctenomys cf. knighti (Rodentia) in the northern Monte Desert of Argentina

Fracchia, Sebastián; Krapovickas, L.; Aranda-Rickert, Adriana; Valentinuzzi, Verónica Sandra

doi:10.1016/j.jaridenv.2011.04.034

Cited by 45 publications

(30 citation statements)

References 46 publications

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“…DSE colonization rate in sorghum roots was from 50.5% to 62.5% in this study, it was showed that E. pisciphila could well form mutualistic association with sorghum. The high root colonization rate of DSE was also found in some plants from drought desert ecosystems in Argentina (Fracchia et al, 2011). Most of DSE are lack of conidia or other reproductive structures for dispersal and survival, intracellular-melanized hyphal aggregation acts as dispersal propagules for DSE colonization within epidermis and cortex of plant roots, which reflect an adaptation to abiotic factors in different stress environment (Hambleton and Currah, 1997).…”

Section: Discussionmentioning

confidence: 80%

Dark Septate Endophyte Improves Drought Tolerance in Sorghum

Zhang¹,

Gong²,

Yuan³

et al. 2017

IJAB

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Dark septate endophytes (DSE) protect host plants against a variety of environmental stresses, however our knowledge about the roles of DSE in improving drought tolerance of crops is poor. In this study, sorghum (Sorghum bicolor L. Moench) was inoculated with a DSE strain (Exophiala pisciphila GM25) under two different soil water conditions (well-watered (WW), -0.11 MPa; drought-stressed (DS), -0.69 MPa) for one month. At the end of this experiment, sorghum roots were obviously colonized by DSE with 50.5%-62.5% colonization rate. When compared with non-inoculated seedlings under both WW and DS conditions, E. pisciphila-inoculated sorghum had greater plant height, collar diameter, shoot dry weight, net photosynthetic rate (Pn), stomatal conductance (g s ), transpiration rate (E), maximal photochemical efficiency of PSII photochemistry (Fv/Fm) and actual quantum yield (PSII), and lower intercellular CO 2 concentration (Ci). In addition, in comparison to noninoculation under DS conditions, E. pisciphila inoculation also improved the root dry weight, non-photochemical quenching values (NPQ), photochemical quenching values (qP), increased the content of related secondary metabolites including anthocyanin, polyphenol and flavonoid and enhanced the enzymatic activities related to secondary metabolism, such as cinnamyl alcohol dehydrogenase (CAD), phenylalanine ammonia-lyase (PAL), guaiacol peroxidase (G-POD) in sorghum seedlings. Our results demonstrated that the drought resistance of sorghum seedlings were positively improved by E. pisciphila inoculation with better plant growth, gas exchange, photosynthesis, chlorophyll fluorescence, secondary metabolites and enzyme activities related to secondary metabolism. Inoculation with E. pisciphila is an efficient strategy to survive for sorghum in drought environment.

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Section: Discussionmentioning

confidence: 80%

Dark Septate Endophyte Improves Drought Tolerance in Sorghum

Zhang¹,

Gong²,

Yuan³

et al. 2017

IJAB

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“…As was demonstrated for the desert inhabiting tuco-tuco C. cf. knighti, Thomas, 1919(Fracchia et al 2011) the tuco-tucos are dispersal agents of root-associated fungi. This ecological role is particularly important for the populations of Butia paraguayensis and Butia yatay palm groves, broadly distributed in the Corrientes Province.…”

Section: Habitat Stability and Conservationmentioning

confidence: 99%

Integrative lineage delimitation in rodents of the Ctenomys Corrientes group

Caraballo

Rossi

2017

Mammalia

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Abstract:The tuco-tucos rodents (genus Ctenomys) of the Corrientes group comprise several populations that inhabit the vast area under the influence of the Iberá wetland. Lineage delimitation within the recently diverged Corrientes group is a challenging task as morphological differentiation is not conspicuous between populations. However, delimitation is crucial for evolutionary studies and conservation issues. In this study, we performed a phylogenetic analysis including cytochrome b (cyt-b) sequences from taxa that had never been studied in a comprehensive context. We integrated previously published chromosomal studies, mitochondrial phylogenies and simple sequence repeat (SSR) variability analyses, and applied a delimitation criterion over the basis of chromosomal incompatibilities and genetic exclusivity. Under this integrative approach seven independently evolving lineages were delimited in the Corrientes group: Ctenomys roigi, which conserves its former definition, Ctenomys dorbignyi and Ctenomys perrensi complex which were redefined, Sarandicito which includes the population of Paraje Sarandicito and probably a group of nearby poorly studied populations, and Iberá i, ii and iii distributed at both sides of the Iberá wetland. We discuss future perspectives to evaluate the proposed lineages and conservation issues concerning these tuco-tucos.

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“…), small mammals (Fracchia et al. ), water (Walker ) or soil fauna (Klironomos & Moutoglis ). Natural restoration of the entire fungal community may take decades (Baar et al.…”

Section: Introductionmentioning

confidence: 99%

Effects of adding an arbuscular mycorrhizal fungi inoculum and of distance to donor sites on plant species recolonization following topsoil removal

Torrez

Ceulemans

Mergeay

et al. 2015

Applied Vegetation Science

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Questions: Does addition of an arbuscular mycorrhizal fungi (AMF) inoculum increase the short-term restoration success of nutrient-poor grassland (NPG) after topsoil removal? Does distance to intact remnant grassland (IRG) patches affect restoration success, and does the effect of inoculum addition depend on distance to IRGs?Location: Meerdaal forest, Oud-Heverlee, Belgium.Methods: In a topsoil-removed site of 8.5 ha, where 24 IRG patches (ca. 10% of the area) were kept, 48 plots (1 m 2 ) were established at three distances (5, 10 and 20 m) from the edge of IRG patches. Half of the plots at each distance class were inoculated with a custom-made AMF inoculum, whereas the remaining plots were used as controls. We recorded plant species abundance in the plots, just before addition of the AMF inoculum and 1 yr after. We used repeated measures ANOVA to test for effects of inoculum addition, distance to IRG patches and their interaction on plant species richness, diversity and plant community similarity between IRG patches and plots. We also evaluated the response of AMF-dependent plant species, specialist species of NPG and species with specific seed dispersal adaptations.Results: Adding the inoculum positively affected species richness and/or diversity of all plant species, AMF-dependent species and specialist species. It increased plant community similarity to the IRG patches. Increasing distance from IRG patches had a negative effect on richness and/or diversity of all plant species and specialist species. The positive effect of inoculum addition on richness and/or diversity of all species, AMF-dependent species and specialist species decreased with increasing distance from IRG patches to the plots, likely indicating priority effects. Conclusions:The application of a custom-made AMF inoculum increased the short-term restoration success of NPG after topsoil removal. Dispersal limitation of specialist plant species of NPG, however, likely negatively affected the effect of inoculum addition. Apart from the AMF effect, the reported strongly positive short-time effect of inoculation was likely due to the high density of IRG patches at the site, and the presence of organic matter and other micro-organisms in the inoculum.

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Dispersal of arbuscular mycorrhizal fungi and dark septate endophytes by Ctenomys cf. knighti (Rodentia) in the northern Monte Desert of Argentina

Cited by 45 publications

References 46 publications

Dark Septate Endophyte Improves Drought Tolerance in Sorghum

Dark Septate Endophyte Improves Drought Tolerance in Sorghum

Integrative lineage delimitation in rodents of the Ctenomys Corrientes group

Effects of adding an arbuscular mycorrhizal fungi inoculum and of distance to donor sites on plant species recolonization following topsoil removal

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