Extending Hyperspectral Imaging for Plant Phenotyping to the UV-Range

Autor/in: Brugger, A., J. Behmann, S. Paulus, H.-G. Luigs, M. T. Kuska, P. Schramowski, K. Kersting, U. Steiner, A.-K. Mahlein
Jahr: 2019
Zeitschrift: Remote Sensing
Seite/n: DOI: 10.3390/rs11121401
Stichworte: plant substances; hyperspectral imaging; UV-range; abiotic stress

Published in Projekt Veröffentlichungen, die keinem Projekt und keiner Abteilung zugeordnet sind / Abteilung Additional projects and publications

Abstract

Previous plant phenotyping studies have focused on the visible (VIS, 400–700 nm), near-infrared (NIR, 700–1000 nm) and short-wave infrared (SWIR, 1000–2500 nm) range. The ultraviolet range (UV, 200–380 nm) has not yet been used in plant phenotyping even though a number of plant molecules like ﬂavones and phenol feature absorption maxima in this range. In this study an imaging UV line scanner in the range of 250–430 nm is introduced to investigate crop plants for plant phenotyping. Observing plants in the UV-range can provide information about important changes of plant substances. To record reliable and reproducible time series results, measurement conditions were deﬁned that exclude phototoxic effects of UV-illumination in the plant tissue. The measurement quality of the UV-camera has been assessed by comparing it to a non-imaging UV-spectrometer by measuring six different plant-based substances. Given the ﬁndings of these preliminary studies, an experiment has been deﬁned and performed monitoring the stress response of barley leaves to salt stress. The aim was to visualize the effects of abiotic stress within the UV-range to provide new insights into the stress response of plants. Our study demonstrated the ﬁrst use of a hyperspectral sensor in the UV-range for stress detection in plant phenotyping.

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