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November 26, 2022
dividerNews ArchivedividerDr. Onno Muller at High-Throughput Phenotyping for Crop Physiology and Plant Breeding Workshop, ABRII
Dr. Onno Muller at High-Throughput Phenotyping for Crop Physiology and Plant Breeding Workshop, ABRII
Dr. Onno Muller at High-Throughput Phenotyping for Crop Physiology and Plant Breeding Workshop, ABRII

Dr. Onno Muller is Senior Researcher and the head of the Field Phenotyping at IBG-2: Plant Sciences at Institute of Bio- and Geosciences, Forschungszentrum Jülich, Germany. In field phenotyping Dr. Muller and his colleagues at ING-2, aim to quantifying plant traits under natural or controlled (e.g. CO2) growth conditions in the field non-invasively. Hereby they focus specifically on leaf photosynthesis and link this to transport processes and canopy functioning.  For non-invasive photosynthesis measurements they are using the leaf fluorescence signal. Leaf fluorescence is quantified among others by the light induced fluorescence transient (LIFT) method. The collaborative effort of IBG-2 researchers with the first terrestrial LIFT device resulted in a small phenotyping device which has been adapted to multiple positioning systems. Their phenotyping efforts concentrate on crop species in Germany but they are also active in Brazil and Nigeria. Therefore, IBG-2 maintains fields with dedicated genotypes (common experiment) as well as a Free Air CO2 Enrichment (FACE) facility for phenotyping under elevated CO2 concentrations in the field (BreedFACE). Within the Shoot Dynamics this group collaborate to understand jointly leaf fluorescence from chloroplast to satellite level, within IBG-2 to understand whole plant (transport) processes, and beyond IBG-2 to model leaf fluorescence, and are open for new collaborations on field phenotyping.

Dr. Muller’s further research focused on bottlenecks in photosynthesis under different environmental conditions, especially temperature. He showed among others foliar vascular traits that determine the sugar export and delivery of water to leaves, link to photosynthetic performance of the leaves with specific vascular anatomical adjustment depending on the phloem loading mode while working together with Barbara Demmig-Adams and Williams Adams at Colorado University, US. Before these detailed measurements he worked at a much larger scale in the forest where he manipulated soil and branch temperature in a warming experiment in a deciduous forest in Hokkaido, Japan, while working with Tsutom Hiura and Masahiro Nakamura. Both these research topics originated from small scale leaf level chloroplast adjustment anatomical measurements and seasonal changes in leaf nitrogen, allocation and modeled optimal contents, under changing natural temperature conditions while working together with Kouki Hikosaka and Tadaki Hirose at Tohoku University, Japan and Marinus Werger at Utrecht University, The Netherlands.


Dr. Muller’s lecture will be on “Field phenotyping- quantifying plant traits for crops where they grow today and in the future” at this workshop.

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