Your browser has javascript turned off or blocked. This will lead to some parts of our website to not work properly or at all. Turn on javascript for best performance.

The browser you are using is not supported by this website. All versions of Internet Explorer are no longer supported, either by us or Microsoft (read more here: https://www.microsoft.com/en-us/microsoft-365/windows/end-of-ie-support).

Please use a modern browser to fully experience our website, such as the newest versions of Edge, Chrome, Firefox or Safari etc.

Per Persson. Photo.

Per Persson

Director

Per Persson. Photo.

Shining new light into soil systems : Spectroscopy in microfluidic soil chips reveals microbial biogeochemistry

Author

  • Milda Pucetaite
  • Pelle Ohlsson
  • Per Persson
  • Edith Hammer

Summary, in English

Microfluidic soil chips render optical access to the naturally opaque soil systems and enable direct investigation of microbial growth and interactions in micro-structurally and chemically controlled environments. However, chemical analyses of these interactions at high spatial and temporal resolution are still lacking. Here we propose that the use of advanced microspectroscopy techniques, namely infrared absorption, Raman scattering and synchrotron radiation based X-ray microspectroscopy, in microfluidic soil chips would make it possible to approach these phenomena. They allow monitoring biogeochemical processes in and around soil microbial cells growing in the reproducibly designed microenvironments within the chips at (sub)micrometer scale. Complementary use of several of the microspectroscopy techniques is beneficial for obtaining information about both molecular and elemental composition, oxidation states and local structure of the elements in the sample. Ultimately, we argue that microspectroscopy in microfluidic chips can lead to relevant breakthroughs in frontier research areas in soil science, such as (1) analysis of chemical responses of microbes to environmental triggers at micro-scale spatial resolution, (2) phenotypical identification and phylogenetic classification of single cells of soil microbes in situ, (3) determining spatially and time resolved effects of heavy metals and organic pollutants, including microplastics, on soils and (4) spatially resolved analysis of soil organic matter dynamics for better understanding of soil carbon storage. Tailoring the chip design to achieve optical transparency to the radiation type used by the different microspectroscopy methods is crucial to achieve this; therefore, we expect that this perspective will inspire the scientific community to use the proposed approaches and thus push both the technical development of the microspectroscopy suitable soil chips and the research frontier in soil science.

Department/s

  • Centre for Environmental and Climate Science (CEC)
  • BECC - Biodiversity and Ecosystem services in a Changing Climate
  • Department of Biomedical Engineering
  • Microbial Ecology
  • MEMEG

Publishing year

2021

Language

English

Publication/Series

Soil Biology and Biochemistry

Volume

153

Document type

Journal article

Publisher

Elsevier

Topic

  • Soil Science
  • Microbiology

Keywords

  • Microbial biogeochemistry
  • Microbial interactions
  • Microfluidics
  • Soil chip
  • Vibrational microspectroscopy
  • X-ray microspectroscopy

Status

Published

Project

  • How do microbes “tuck away” carbon? The role of microbes in physical soil organic carbon stabilization

Research group

  • Microbial Ecology

ISBN/ISSN/Other

  • ISSN: 0038-0717