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Department of Chemistry, Umeå University, Linnaeus väg 6, SE-901 87 Umeå, Sweden
Interests: vibrational spectroscopy and microspectroscopy; hyperspectral imaging; multivariate data analysis
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Dr. Notburga Gierlinger

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Institute for Biophysics, University of Natural Resources and Life Sciences (BOKU), A-1190 Vienna, Austria
Interests: FT-IR and Raman microscopy; fluorescence microscopy; Raman imaging; multivariate data analysis; plant cell walls; wood, nut shells
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Dr. Marie-Françoise Devaux

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Biopolymères Interactions Assemblages (BIA), INRAE, Rue de la Géraudière, F-44316 Nantes, France
Interests: quantification of the morphology of plant tissues and of the spatial distribution of their biochemical constituents in order to establish relationships between spatial heterogeneity and the end use properties; multi and hyperspectral image analysis; multimodal image analysis; chemometry; multiscale and multimodal imaging: microscopy and macroscopy; quantitative histology, chemical cartography

Dr. Fabienne Guillon

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Biopolymères Interactions Assemblages (BIA), INRAE, Rue de la Géraudière, F-44316 Nantes, France
Interests: plant cell wall; plant imaging; lignocellulosic biomass; cereal grains

Special Issue Information

Dear Colleagues,

This Special Issue aims to collect selected contributions from the Third International Plant Spectroscopy Conference (IPSC), scheduled to take place in Nantes, France, on September 12–15, 2022, as arranged by the International Society for Plant Spectroscopy.

Plants are vital for life on Earth, and in times when a change toward sustainability is of critical importance, they provide renewable resources for virtually all aspects of our daily lives. Plants are vastly complicated, and while detailed knowledge about plant structure and chemistry is acutely needed, such knowledge is not easy to gain. The current Research Topic aims to present the state of the art within the use of different types of spectroscopies and fields related to the study of plants and plant-based products. A special field within plant spectroscopy is hyperspectral imaging, which collects and displays chemical information in a spatial context, often at a sub-cellular resolution. The techniques are used beyond chemical compositional analyses, to understand, e.g., plant growth and development, plant biomechanics and the genetic regulations of a wide range of processes.

Since the techniques generate vast amounts of data, chemometric tools are highly valuable in the field and will be covered as well.

The proposed Research Topic presents the latest findings and developments within all the above-mentioned aspects of plant spectroscopy.

Dr. András Gorzsás
Dr. Notburga Gierlinger
Dr. Marie-Françoise Devaux
Dr. Fabienne Guillon
Guest Editors

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Keywords

spectroscopy
plant
imaging
chemometrics

Published Papers (2 papers)

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Research

Open AccessArticle

Comparative Analysis of G-Layers in Bast Fiber and Xylem Cell Walls in Flax Using Raman Spectroscopy

and

Biomolecules 2023, 13(3), 435; https://doi.org/10.3390/biom13030435 - 24 Feb 2023

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Abstract

In a response to gravitropic stress, G-layers (gelatinous layers) were deposited in xylem cell walls of tilted flax plants. G-layers were produced in both tension wood (upper side) as expected but were also observed in opposite wood (lower side). Raman spectral profiles were acquired for xylem G-layers from the tension and opposite side as well as from the G-layer of bast fibers grown under non-tilted conditions. Statistical analysis by principal component analysis (PCA) and partial least square-discriminant analysis (PLS-DA) clearly distinguished bast fiber G-layers from xylem G-layers. Discriminating bands were observed for cellulose (380–1150–1376 cm^–1), hemicelluloses (517–1094–1126–1452 cm^–1) and aromatics (1270–1599–1658 cm^–1). PCA did not allow separation of G-layers from tension/opposite-wood sides. In contrast, the two types of xylem G-layers could be incompletely discriminated through PLS-DA. Overall, the results suggested that while the architecture (polymer spatial distribution) of bast fibers G-layers and xylem G-layers are similar, they should be considered as belonging to a different cell wall layer category based upon ontogenetical and chemical composition parameters. Full article

(This article belongs to the Special Issue Recent Advances within Plant Spectroscopy: Selected Papers from the Third International Plant Spectroscopy Conference)

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Open AccessArticle

Characterization of Potato Tuber Tissues Using Spatialized MRI T2 Relaxometry

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Biomolecules 2023, 13(2), 286; https://doi.org/10.3390/biom13020286 - 02 Feb 2023

Viewed by 637

Abstract

Magnetic Resonance Imaging is a powerful non-destructive tool in the study of plant tissues. For potato tubers, it greatly assists the study of tissue defects and tissue evolution during storage. This paper describes the MRI analysis of potato tubers with internal defects in [...] Read more.

T_{2}

relaxometry was used to generate bi-exponential

T_{2}

maps, coupled with a classification scheme to identify the different

T_{2}

homogeneous zones within the tubers. Six classes with statistically different relaxation parameters were identified at each sampling date, allowing the defects and the pith and cortex tissues to be detected. A further distinction could be made between three constitutive elements within the flesh, revealing the heterogeneity of this particular tissue. Relaxation parameters for each class and their evolution during storage were successfully analyzed. The work demonstrated the value of MRI for detailed non-invasive plant tissue characterization. Full article

(This article belongs to the Special Issue Recent Advances within Plant Spectroscopy: Selected Papers from the Third International Plant Spectroscopy Conference)

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