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Root fungal endophytes improve the growth of antarctic plants through an enhanced nitrogen acquisition

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233 days ago
Root fungal endophytes improve the growth of antarctic plants through an enhanced nitrogen acquisition https://t.co/Nw1cPiTKVs
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Supplemental Information

Total biomass accumulation in individuals of Colobanthus quitensis and Deschampsia antarctica with (E +) and without (E -) root fungal endophytes after nitrogen mineralization assay

Penicillium chrysosgenum and Penicillium brevicompactum were used as root fungal endophytes for C. quitensis and D. antarctica, respectively. The mean and quartile distribution of individual plants (n =7) are indicated. Asterisks denote significant differences between treatments (p < 0.05) as determined by a t-test.

DOI: 10.7287/peerj.preprints.26774v1/supp-1

Kinetic of nitrogen mineralization in soils in contact with axenic individuals of Colobanthus quitensis and Deschampsia antarctica inoculated (E+) or not inoculated (E-) with root fungal endophytes

Single plants individuals (n = 7) emerging from benomyl-treated cultures were cultured in 300 ml pots containing autoclaved antarctic soil supplemented with urea as nitrogen source. Mineralization was estimated as the percentage of N-urea transformed to N-NH4+. Asterisks denote significant mean differences between treatments.

DOI: 10.7287/peerj.preprints.26774v1/supp-2

Additional Information

Competing Interests

The authors declare that they have no competing interests.

Author Contributions

Romulo Oses Pedraza conceived and designed the experiments, performed the experiments, analyzed the data, contributed reagents/materials/analysis tools, prepared figures and/or tables, authored or reviewed drafts of the paper, approved the final draft.

Cristian Torres-Díaz analyzed the data, contributed reagents/materials/analysis tools, authored or reviewed drafts of the paper, approved the final draft.

Paris Lavin contributed reagents/materials/analysis tools, authored or reviewed drafts of the paper, approved the final draft.

Patricio Retamales-Molina contributed reagents/materials/analysis tools, authored or reviewed drafts of the paper, approved the final draft.

Cristian Atala contributed reagents/materials/analysis tools, authored or reviewed drafts of the paper, approved the final draft.

Ian Acuña-Rodríguez analyzed the data, prepared figures and/or tables, authored or reviewed drafts of the paper, approved the final draft.

Marco A. Molina-Montenegro conceived and designed the experiments, performed the experiments, analyzed the data, prepared figures and/or tables, authored or reviewed drafts of the paper, approved the final draft.

Field Study Permissions

The following information was supplied relating to field study approvals (i.e., approving body and any reference numbers):

All plants were collected with permission from the Chilean Antarctic Institute (INACH).

Funding

This work was supported by the Chilean Antarctic Institute (INACH), the Chilean Navy (AP-41 “Aquiles” and AP-46 “Almirante Oscar Viel”) and the Arctowski Polish Antarctic Station. This work was supported by The National Fund for Scientific and Technological Development, FONDECYT Postdoctoral Grant Nº 3140279 and the INACH G22-11 Grant of Chilean Antarctic Institute (INACH). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.


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