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Cellular dissolution at hypha- and spore-mineral interfaces revealing unrecognized mechanisms and scales of fungal weathering

2016; Geological Society of America; Volume: 44; Issue: 4 Linguagem: Inglês

10.1130/g37561.1

1943-2682

Zi-bo Li, Lianwen Liu, Jun Chen, H. Henry Teng,

Biocrusts and Microbial Ecology

Research Article| April 01, 2016 Cellular dissolution at hypha- and spore-mineral interfaces revealing unrecognized mechanisms and scales of fungal weathering Zibo Li; Zibo Li 1Key Laboratory of Surficial Geochemistry, Ministry of Education, School of Earth Sciences and Engineering, Nanjing University, Nanjing 210046, PR China Search for other works by this author on: GSW Google Scholar Lianwen Liu; Lianwen Liu 1Key Laboratory of Surficial Geochemistry, Ministry of Education, School of Earth Sciences and Engineering, Nanjing University, Nanjing 210046, PR China Search for other works by this author on: GSW Google Scholar Jun Chen; Jun Chen 1Key Laboratory of Surficial Geochemistry, Ministry of Education, School of Earth Sciences and Engineering, Nanjing University, Nanjing 210046, PR China Search for other works by this author on: GSW Google Scholar H. Henry Teng H. Henry Teng * 1Key Laboratory of Surficial Geochemistry, Ministry of Education, School of Earth Sciences and Engineering, Nanjing University, Nanjing 210046, PR China2Department of Chemistry, George Washington University, Washington, DC 20006, USA *E-mail: hteng@gwu.edu Search for other works by this author on: GSW Google Scholar Geology (2016) 44 (4): 319–322. https://doi.org/10.1130/G37561.1 Article history received: 25 Nov 2015 rev-recd: 18 Feb 2016 accepted: 22 Feb 2016 first online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Zibo Li, Lianwen Liu, Jun Chen, H. Henry Teng; Cellular dissolution at hypha- and spore-mineral interfaces revealing unrecognized mechanisms and scales of fungal weathering. Geology 2016;; 44 (4): 319–322. doi: https://doi.org/10.1130/G37561.1 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract Fungus-mineral interactions play unparalleled roles in shaping the planet Earth but are underappreciated relative to bacterial influences. Unique to fungus, but largely unknown, are the interfacial processes and extensiveness of hypha- versus spore-mineral interactions given the associated turgor pressure differences and the vast contact areas between mycelia and minerals in the critical zone. Here we examine lizardite [Mg3Si2O5(OH)4] dissolution by single cells of a native fungal strain using confocal laser scanning microscopy, atomic force microscopy, and transmission electron microscopy–energy dispersive X-ray spectroscopy to explore the mechanism, driving force, and magnitude of the interfacial reactions. Results from our inspection showed (1) significant pH reduction in the vicinity of cells upon mineral surface attachment, (2) exclusive Fe loss from the mineral at the cell-mineral interfaces, and (3) destruction of the mineral crystal structure below the area colonized by hyphae but not that by spores. Compared to the results from bulk experiments and at the mineral-water interface, these observations indicate that (1) only attached cells release siderophores and (2) biomechanical forces of hyphal growth are indispensable for fungal weathering and strong enough to breach the mineral lattice. Estimated mineral mass loss at the interface suggests that cellular dissolution can ultimately account for ∼40%–50% of the overall bio-weathering, significantly larger than the previous estimate of ∼1% contribution. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.