Synchrotron radiation-based microcomputed tomography for three-dimensional growth analysis of Aspergillus niger pellets

Henri Müller, Charlotte Deffur, Stefan Schmideder, Lars Barthel, Tiaan Friedrich, Lukas Mirlach, Jörg U. Hammel, Vera Meyer, Heiko Briesen

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Filamentous fungi produce a wide range of relevant biotechnological compounds. The close relationship between fungal morphology and productivity has led to a variety of analytical methods to quantify their macromorphology. Nevertheless, only a µ-computed tomography (µ-CT) based method allows a detailed analysis of the 3D micromorphology of fungal pellets. However, the low sample throughput of a laboratory µ-CT limits the tracking of the micromorphological evolution of a statistically representative number of submerged cultivated fungal pellets over time. To meet this challenge, we applied synchrotron radiation-based X-ray microtomography at the Deutsches Elektronen-Synchrotron [German Electron Synchrotron Research Center], resulting in 19,940 3D analyzed individual fungal pellets that were obtained from 26 sampling points during a 48 h Aspergillus niger submerged batch cultivation. For each of the pellets, we were able to determine micromorphological properties such as number and density of spores, tips, branching points, and hyphae. The computed data allowed us to monitor the growth of submerged cultivated fungal pellets in highly resolved 3D for the first time. The generated morphological database from synchrotron measurements can be used to understand, describe, and model the growth of filamentous fungal cultivations.

Original languageEnglish
Pages (from-to)3244-3260
Number of pages17
JournalBiotechnology and Bioengineering
Volume120
Issue number11
DOIs
StatePublished - Nov 2023

Keywords

  • 3D image analysis
  • Aspergillus niger
  • computed tomography
  • filamentous fungi
  • morphology
  • pellet growth

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