Field performance of alder-Frankia symbionts for the reclamation of oil sands sites

Lefrançois, Elisabeth; Quoreshi, Ali M.; Khasa, Damase P.; Fung, M.; Whyte, Lyle G.; Roy, Suzanne; Greer, Charles W.

doi:10.1016/j.apsoil.2010.08.010

Cited by 40 publications

(34 citation statements)

References 46 publications

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“…Furthermore, very few studies focused on endophytic communities in oil sands reclamation covers using culture-independent methods (Lefrançois et al, 2010). In an attempt to unravel the root associated bacterial microbiome of plants growing in reclamation soils, we used 16S rRNA high-throughput amplicon sequencing to characterize endophytic and rhizosphere bacterial communities associated with two plant species in one of the Athabasca oil sands reclamation sites.…”

Section: Discussionmentioning

confidence: 99%

Bacterial Root Microbiome of Plants Growing in Oil Sands Reclamation Covers

2017

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Oil sands mining in northern Alberta impacts a large footprint, but the industry is committed to reclaim all disturbed land to an ecologically healthy state in response to environmental regulations. However, these newly reconstructed landscapes may be limited by several factors that include low soil nutrient levels and reduced microbial activity. Rhizosphere microorganisms colonize plant roots providing hosts with nutrients, stimulating growth, suppressing disease and increasing tolerance to abiotic stress. High-throughput sequencing techniques can be used to provide a detailed characterization of microbial community structure. This study used 16S rRNA amplicon sequencing to characterize the bacterial root microbiome associated with annual barley (Hordeum vulgare) and sweet clover (Melilotus albus) growing in an oil sands reclamation area. Our results indicate that Proteobacteria dominated the endosphere, whereas other phyla such as Acidobacteria and Gemmatimonadetes were restricted to the rhizosphere, suggesting that plants have the ability to select for certain soil bacterial consortia. The bacterial community in the endosphere compartments were less rich and diverse compared to the rhizosphere. Furthermore, it was apparent that sweet clover plants were more selective, as the community exhibited a lower richness and diversity compared to barley. Members of the family Rhizobiaceae, such as Sinorhizobium and Rhizobium were mainly associated with clover, whereas Acholeplasma (wall-less bacteria transmitted by insects) was unique to barley. Genera from the Enterobacteriaceae family, such as Yersinia and Lentzea were also mostly detected in barley, while other genera such Pseudomonas and Pantoea were able to successfully colonize both plants. Endophytic bacterial profiles varied within the same plant species at different sampling locations; however, these differences were driven by factors other than slope positions or cover management. Our results suggest that bacterial endophytic communities of plants growing in land reclamation systems are a subset of the rhizosphere community and selection is driven by plant factors.

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Section: Discussionmentioning

confidence: 99%

Bacterial Root Microbiome of Plants Growing in Oil Sands Reclamation Covers

2017

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“…Shrubs were previously planted in some reclamation areas and shrub establishment has been identified as a priority for new oil sands land reclamation [32], but planting desirable shrub species in older reclamation sites may also be required so work is currently underway to determine the most appropriate time during stand development to plant shrubs. Planting of shrubs, specifically alder inoculated with nitrogen fixing actinomycetes, has shown the potential to improve soil chemical and biological quality [33] indicating potential feedbacks between shrubs and other ecosystem components.…”

Section: Discussionmentioning

confidence: 99%

Temporal Trends of Ecosystem Development on Different Site Types in Reclaimed Boreal Forests

Pinno

Hawkes

2015

Forests

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Forest development after land reclamation in the oil sands mining region of northern Alberta, Canada was assessed using long-term monitoring plots from both reclaimed and natural forests. The metrics of ecosystem development analyzed included measures of plant community structure and composition and soil nutrient availability. Early seral reclamation plots were grouped by site type (dry and moist-rich) and age categories, and these were compared with mature natural forests. There were few significant differences in ecosystem metrics between reclamation site types, but natural stands showed numerous significant differences between site types. Over time, there were significant changes in most plant community metrics such as species richness and cover of plant community groups (e.g., forbs, shrubs, and non-native species), but these were still substantially different from mature forests 20 years after reclamation. Available soil nitrogen did not change over time or by reclamation site type but available soil phosphorus did, suggesting that phosphorus may be a more suitable indicator of ecosystem development. The significant temporal changes in these reclaimed ecosystems indicate that studies of ecosystem establishment and development on reclaimed areas should be conducted over the long-term, emphasizing the utility of monitoring using long-term plot networks. OPEN ACCESSForests 2015, 6 2110

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“…For instance, it was reported that in legume plants, Cd contamination could result in a decreased uptake of nutrients, inhibition of various enzyme activities, and induction of oxidative stress (Sandalio et al 2001 ) or inhibition of chlorophyll synthesis and photosynthesis (Padmaja et al 1990 ). Actinorhizal plants such as alders have been used for the reclamation of sites contaminated with toxic levels of trace elements (Lefrancois et al 2010 ;Babu et al 2013 ;Lorenc-Pluciñska et al 2013 ). It is currently accepted that the sensitivity to a given heavy metal is variable according to plant species.…”

Section: Alleviation Of Heavy Metal Toxicity In Contaminated Soilsmentioning

confidence: 99%

Plant Microbes Symbiosis: Applied Facets

Arora¹

2015

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Field performance of alder-Frankia symbionts for the reclamation of oil sands sites

Cited by 40 publications

References 46 publications

Bacterial Root Microbiome of Plants Growing in Oil Sands Reclamation Covers

Bacterial Root Microbiome of Plants Growing in Oil Sands Reclamation Covers

Temporal Trends of Ecosystem Development on Different Site Types in Reclaimed Boreal Forests

Plant Microbes Symbiosis: Applied Facets

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