Abstract
Alders are well recognized for their ability to colonize the harsh environments created by either natural processes or human activity. They establish symbiosis with the actinomycete Frankia alni which supplies 70 to 100 % of the plant's nitrogen requirements. An important challenge facing the oil sands industry in Alberta, Canada, is management of the toxicity of Tailing Sands (TS) that are alkaline, saline and contain Naphthenic Acids (NA).In order to begin to understand how alders, Frankia alni and their symbiosis perform and adapt to these challenging environmental conditions, the tolerance of the microsymbiont (Frankia alni), the host plants (alders) and their symbiosis to specific compounds found in TS was studied. In addition, the metabolic response of Frankia alni ACN14a to the presence of NA was characterized. The Frankia alni strains tested tolerated both high pH and NA levels in addition to salts near or at the concentrations found in TS. Furthermore, actinorhizal symbiosis can establish itself under these conditions. NaCl was observed to exert the greatest stress on the establishment of symbiosis, decreasing the efficiency of the actinorhizal symbiosis. Inoculation of the alder plants with Frankia alni induced a significant increase in aerial biomass allocation. Finally, intracellular proteins in Frankia alni alni ACN14a whose expression level were influenced by naphthenic acids were identified. Together, these results demonstrate that actinorhizal alders show significant promise for use in the revegetation of lands affected by the mine tailings of the Canadian petroleum industry.
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Claims 6
Claim · model-written summary
Tested Frankia alni strains tolerated high pH, naphthenic acids and salts near or at tailings concentrations.
- Taxon
- Frankia alni
Frankia alnie0 - Outcome
- tolerated both high pH and NA levels in addition to saltse0
- Qualifier
- near or at the concentrations found in TSe0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The Frankia alni strains tested tolerated both high pH and NA levels in addition to salts near or at the concentrations found in TS”
Claim · model-written summary
Actinorhizal symbiosis can establish under the tested tailings-related conditions.
- Interactor
- Frankia alniFrankia alnie2symbiont
- Outcome
- actinorhizal symbiosis can establish itselfe0
- Qualifier
- high pH and NA levels in addition to salts near or at the concentrations found in TSe2
AlnusNot reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Furthermore, actinorhizal symbiosis can establish itself under these conditions”
e1“the host plants (alders) and their symbiosis to specific compounds found in TS was studied”
e2“The Frankia alni strains tested tolerated both high pH and NA levels in addition to salts near or at the concentrations found in TS”
Claim · model-written summary
NaCl imposed the greatest stress on alder symbiosis establishment and decreased its efficiency.
- Treatment
- NaCle0
- Interactor
- Frankia alniFrankia alnie2symbiont
- Outcome
- efficiency of the actinorhizal symbiosise0
- Direction
- decreasinge0
- Qualifier
- greatest stress on the establishment of symbiosise0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“NaCl was observed to exert the greatest stress on the establishment of symbiosis, decreasing the efficiency of the actinorhizal symbiosis”
e1“the host plants (alders)”
e2“the tolerance of the microsymbiont (Frankia alni)”
Claim · model-written summary
Frankia alni inoculation significantly increased aerial biomass allocation in alder plants.
- Treatment
- Inoculation of the alder plants with Frankia alnie0
- Interactor
- Frankia alniFrankia alnie0symbiont
- Outcome
- aerial biomass allocatione0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Inoculation of the alder plants with Frankia alni induced a significant increase in aerial biomass allocation”
Claim · model-written summary
Intracellular proteins in Frankia alni alni ACN14a with expression affected by naphthenic acids were identified.
- Taxon
- Frankia alni alni ACN14aFrankia alnie0
- Outcome
- intracellular proteinse0
- Qualifier
- whose expression level were influenced by naphthenic acidse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“intracellular proteins in Frankia alni alni ACN14a whose expression level were influenced by naphthenic acids were identified”
Claim · model-written summary
Actinorhizal alders show promise for revegetating land affected by Canadian petroleum mine tailings.
- Interactor
- Frankia alniFrankia alnie1symbiont
- Outcome
- use in the revegetation of lands affected by the mine tailings of the Canadian petroleum industrye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“actinorhizal alders show significant promise for use in the revegetation of lands affected by the mine tailings of the Canadian petroleum industry”
e1“the tolerance of the microsymbiont (Frankia alni)”
The same questions in other papers
inoculation · growth · Alnus (alders)Results agree
4 papers in the same direction as this paper
- positive
- positive
- positive
1 paper more in this group
See all 5 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.