Chemical and Physical Mechanisms of Fungal Bioweathering of Rock Phosphate. Issue 5 (3rd May 2021)
- Record Type:
- Journal Article
- Title:
- Chemical and Physical Mechanisms of Fungal Bioweathering of Rock Phosphate. Issue 5 (3rd May 2021)
- Main Title:
- Chemical and Physical Mechanisms of Fungal Bioweathering of Rock Phosphate
- Authors:
- Mendes, Gilberto de Oliveira
Bahri-Esfahani, Jaleh
Csetenyi, Laszlo
Hillier, Stephen
George, Timothy S.
Gadd, Geoffrey Michael - Abstract:
- Abstract: This research has investigated fungal transformations of rock phosphate (RP) by geoactive fungi, with particular emphasis on Aspergillus niger . Direct hyphal interaction with RP particles induced morphological and mineralogical changes, as revealed by scanning electron microscopy (SEM) and X-ray diffraction (XRD) analysis. The formation of the oxalate mineral calcium oxalate monohydrate (whewellite, CaC2 O4 ·H2 O) on RP surfaces showed that mycogenic oxalic acid was driving the chemical dissolution of apatite, with consequent phosphate release and secondary mineral formation. This was supported by abiotic testing of common fungal excreted organic acids which confirmed that oxalic acid was the only effective RP transforming agent and therefore responsible for the morphological and mineralogical changes observed in RP when exposed to fungal colonization. Cryogenic SEM provided evidence of fungal penetration and tunneling through RP particles demonstrating that physical interactions are also important for RP bioweathering, as well as biochemical mechanisms. These findings emphasize the important role of fungi in P cycling, with active participation in the transformation of mineral phosphates through physicochemical mechanisms and secondary oxalate biomineral formation.
- Is Part Of:
- Geomicrobiology journal. Volume 38:Issue 5(2021)
- Journal:
- Geomicrobiology journal
- Issue:
- Volume 38:Issue 5(2021)
- Issue Display:
- Volume 38, Issue 5 (2021)
- Year:
- 2021
- Volume:
- 38
- Issue:
- 5
- Issue Sort Value:
- 2021-0038-0005-0000
- Page Start:
- 384
- Page End:
- 394
- Publication Date:
- 2021-05-03
- Subjects:
- Aspergillus niger -- calcium oxalate -- fungi -- oxalic acid -- rock phosphate -- whewellite
Geomicrobiology -- Periodicals
Biogeochemistry -- Periodicals
579 - Journal URLs:
- http://www.tandfonline.com/toc/ugmb20/current ↗
http://www.tandfonline.com/ ↗ - DOI:
- 10.1080/01490451.2020.1863525 ↗
- Languages:
- English
- ISSNs:
- 0149-0451
- Deposit Type:
- Legaldeposit
- View Content:
- Available online (eLD content is only available in our Reading Rooms) ↗
- Physical Locations:
- British Library DSC - 4147.590000
British Library DSC - BLDSS-3PM
British Library STI - ELD Digital store - Ingest File:
- 16722.xml