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Braglia C, Alberoni D, Di Gioia D, Giacomelli A, Bocquet M, Bulet P. Application of a robust MALDI mass spectrometry approach for bee pollen investigation. Anal Bioanal Chem 2024; 416:4315-4324. [PMID: 38879687 PMCID: PMC11271380 DOI: 10.1007/s00216-024-05368-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2024] [Revised: 05/22/2024] [Accepted: 05/27/2024] [Indexed: 07/23/2024]
Abstract
Pollen collected by pollinators can be used as a marker of the foraging behavior as well as indicate the botanical species present in each environment. Pollen intake is essential for pollinators' health and survival. During the foraging activity, some pollinators, such as honeybees, manipulate the collected pollen mixing it with salivary secretions and nectar (corbicular pollen) changing the pollen chemical profile. Different tools have been developed for the identification of the botanical origin of pollen, based on microscopy, spectrometry, or molecular markers. However, up to date, corbicular pollen has never been investigated. In our work, corbicular pollen from 5 regions with different climate conditions was collected during spring. Pollens were identified with microscopy-based techniques, and then analyzed in MALDI-MS. Four different chemical extraction solutions and two physical disruption methods were tested to achieve a MALDI-MS effective protocol. The best performance was obtained using a sonication disruption method after extraction with acetic acid or trifluoroacetic acid. Therefore, we propose a new rapid and reliable methodology for the identification of the botanical origin of the corbicular pollens using MALDI-MS. This new approach opens to a wide range of environmental studies spanning from plant biodiversity to ecosystem trophic interactions.
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Affiliation(s)
- Chiara Braglia
- Dipartimento di Scienze e Tecnologie Agro-Alimentari (DISTAL), Università di Bologna, Viale Fanin 42, 40127, Bologna, Italia
| | - Daniele Alberoni
- Dipartimento di Scienze e Tecnologie Agro-Alimentari (DISTAL), Università di Bologna, Viale Fanin 42, 40127, Bologna, Italia.
| | - Diana Di Gioia
- Dipartimento di Scienze e Tecnologie Agro-Alimentari (DISTAL), Università di Bologna, Viale Fanin 42, 40127, Bologna, Italia
| | - Alessandra Giacomelli
- Unione Nazionale Associazioni Apicoltori Italiani (UNA API), Via Pietro Boselli 2, Firenze, Italia
| | - Michel Bocquet
- Apimedia, 82 Route de Proméry, Pringy, 74370, Annecy, France
| | - Philippe Bulet
- CR, University Grenoble Alpes, IAB Inserm 1209, CNRS UMR5309, 38000, Grenoble, France
- Plateforme BioPark of Archamps, 74160, Archamps, France
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Zhang K, Huang J, Wang D, Wan X, Wang Y. Covalent polyphenols-proteins interactions in food processing: formation mechanisms, quantification methods, bioactive effects, and applications. Front Nutr 2024; 11:1371401. [PMID: 38510712 PMCID: PMC10951110 DOI: 10.3389/fnut.2024.1371401] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Accepted: 02/26/2024] [Indexed: 03/22/2024] Open
Abstract
Proteins and polyphenols are abundant in the daily diet of humans and their interactions influence, among other things, the texture, flavor, and bioaccessibility of food. There are two types of interactions between them: non-covalent interactions and covalent interactions, the latter being irreversible and more powerful. In this review, we systematically summarized advances in the investigation of possible mechanism underlying covalent polyphenols-proteins interaction in food processing, effect of different processing methods on covalent interaction, methods for characterizing covalent complexes, and impacts of covalent interactions on protein structure, function and nutritional value, as well as potential bioavailability of polyphenols. In terms of health promotion of the prepared covalent complexes, health effects such as antioxidant, hypoglycemic, regulation of intestinal microbiota and regulation of allergic reactions have been summarized. Also, the possible applications in food industry, especially as foaming agents, emulsifiers and nanomaterials have also been discussed. In order to offer directions for novel research on their interactions in food systems, nutritional value, and health properties in vivo, we considered the present challenges and future perspectives of the topic.
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Affiliation(s)
- Kangyi Zhang
- State Key Laboratory of Tea Plant Biology and Utilization, Key Laboratory of Food Nutrition and Safety, School of Tea and Food Science and Technology, Anhui Agricultural University, Hefei, China
- Joint Research Center for Food Nutrition and Health of IHM, Anhui Agricultural University, Hefei, China
- New-style Industrial Tea Beverage Green Manufacturing Joint Laboratory of Anhui Province, Anhui Agricultural University, Hefei, China
| | - Jinbao Huang
- State Key Laboratory of Tea Plant Biology and Utilization, Key Laboratory of Food Nutrition and Safety, School of Tea and Food Science and Technology, Anhui Agricultural University, Hefei, China
- Joint Research Center for Food Nutrition and Health of IHM, Anhui Agricultural University, Hefei, China
- New-style Industrial Tea Beverage Green Manufacturing Joint Laboratory of Anhui Province, Anhui Agricultural University, Hefei, China
| | - Dongxu Wang
- School of Grain Science and Technology, Jiangsu University of Science and Technology, Zhenjiang, China
| | - Xiaochun Wan
- State Key Laboratory of Tea Plant Biology and Utilization, Key Laboratory of Food Nutrition and Safety, School of Tea and Food Science and Technology, Anhui Agricultural University, Hefei, China
| | - Yijun Wang
- State Key Laboratory of Tea Plant Biology and Utilization, Key Laboratory of Food Nutrition and Safety, School of Tea and Food Science and Technology, Anhui Agricultural University, Hefei, China
- Joint Research Center for Food Nutrition and Health of IHM, Anhui Agricultural University, Hefei, China
- New-style Industrial Tea Beverage Green Manufacturing Joint Laboratory of Anhui Province, Anhui Agricultural University, Hefei, China
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Nellessen CM, Nehl DB. An easy adjustment of instrument settings ('Peak MALDI') improves identification of organisms by MALDI-ToF mass spectrometry. Sci Rep 2023; 13:15018. [PMID: 37700004 PMCID: PMC10497524 DOI: 10.1038/s41598-023-42328-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2023] [Accepted: 09/08/2023] [Indexed: 09/14/2023] Open
Abstract
Matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-ToF MS) is a mature technolaogy with 'auto-execute' instrument settings and peak processing parameters tailored for rapid bacterial identification. Adoption for other organisms has been problematic, with optimisation efforts focusing on sample preparation. Using the Bruker MALDI Biotyper, we demonstrate 'Peak MALDI': easily-applied settings that immediately enhance sensitivity, improve spectrum quality, and increase identification confidence for any target, establishing its potential value for all MALDI-ToF MS systems.
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Affiliation(s)
| | - David B Nehl
- Department of Agriculture, Fisheries and Forestry, Sydney, Australia
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Liedtke I, Diehn S, Heiner Z, Seifert S, Obenaus S, Büttner C, Kneipp J. Multivariate Raman mapping for phenotypic characterization in plant tissue sections. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2021; 251:119418. [PMID: 33461131 DOI: 10.1016/j.saa.2020.119418] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Revised: 12/23/2020] [Accepted: 12/30/2020] [Indexed: 06/12/2023]
Abstract
Identifying and characterizing the biochemical variation in plant tissues is an important task in many research fields. Small spectral differences of the plant cell wall that are caused by genetic or environmental influences may be superimposed by individual variation as well as by a microscopic heterogeneity in molecular composition and structure of different histological substructures. A set of 56 samples from Cucumis sativus (cucumber) plants, comprising a total of ~168,000 spectra from tissue sections of leaf, stem, and roots was investigated by Raman microspectroscopic mapping excited at 532 nm. A multivariate analysis was carried out in order to assess the variation of the spectra with respect to origin of the tissue, the histological (cell wall) substructures, and the possibility to discriminate the spectra obtained from different individuals that had been subjected to two different conditions during growth. Combining the results of principal component analysis (PCA) based classification with the original spatial information in the maps of 23 sections of leaf xylem, variation in cell wall composition is found for four different individuals that also includes a discrimination of tissue grown in the presence and absence of additional silicic acid in the irrigation water of the plants. The spectral data point to differences in a contribution by carotenoids, as well as by hydroxycinnamic acids to the spectra. The results give new insight into the chemical heterogeneity of plant tissues and may be useful for elucidating biochemical processes associated with biomineralization by vibrational spectroscopy.
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Affiliation(s)
- Ingrid Liedtke
- Department of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 2, 12489 Berlin, Germany
| | - Sabrina Diehn
- Department of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 2, 12489 Berlin, Germany
| | - Zsuzsanna Heiner
- Department of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 2, 12489 Berlin, Germany; School of Analytical Sciences Adlershof SALSA, Humboldt-Universität zu Berlin, Albert-Einstein-Straße 5-11, 12489 Berlin, Germany
| | - Stephan Seifert
- Department of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 2, 12489 Berlin, Germany
| | - Sabine Obenaus
- Humboldt Universität zu Berlin, Institut für Gartenbauwissenschaften, Fachgebiet Phytomedizin, Lentzeallee 55/57, 14195 Berlin, Germany
| | - Carmen Büttner
- Humboldt Universität zu Berlin, Institut für Gartenbauwissenschaften, Fachgebiet Phytomedizin, Lentzeallee 55/57, 14195 Berlin, Germany
| | - Janina Kneipp
- Department of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 2, 12489 Berlin, Germany.
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Diehn S, Zimmermann B, Tafintseva V, Bağcıoğlu M, Kohler A, Ohlson M, Fjellheim S, Kneipp J. Discrimination of grass pollen of different species by FTIR spectroscopy of individual pollen grains. Anal Bioanal Chem 2020; 412:6459-6474. [PMID: 32350580 PMCID: PMC7442581 DOI: 10.1007/s00216-020-02628-2] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Revised: 03/11/2020] [Accepted: 03/28/2020] [Indexed: 02/06/2023]
Abstract
Fourier-transform infrared (FTIR) spectroscopy enables the chemical characterization and identification of pollen samples, leading to a wide range of applications, such as paleoecology and allergology. This is of particular interest in the identification of grass (Poaceae) species since they have pollen grains of very similar morphology. Unfortunately, the correct identification of FTIR microspectroscopy spectra of single pollen grains is hindered by strong spectral contributions from Mie scattering. Embedding of pollen samples in paraffin helps to retrieve infrared spectra without scattering artifacts. In this study, pollen samples from 10 different populations of five grass species (Anthoxanthum odoratum, Bromus inermis, Hordeum bulbosum, Lolium perenne, and Poa alpina) were embedded in paraffin, and their single grain spectra were obtained by FTIR microspectroscopy. Spectra were subjected to different preprocessing in order to suppress paraffin influence on spectral classification. It is shown that decomposition by non-negative matrix factorization (NMF) and extended multiplicative signal correction (EMSC) that utilizes a paraffin constituent spectrum, respectively, leads to good success rates for the classification of spectra with respect to species by a partial least square discriminant analysis (PLS-DA) model in full cross-validation for several species. PLS-DA, artificial neural network, and random forest classifiers were applied on the EMSC-corrected spectra using an independent validation to assign spectra from unknown populations to the species. Variation within and between species, together with the differences in classification results, is in agreement with the systematics within the Poaceae family. The results illustrate the great potential of FTIR microspectroscopy for automated classification and identification of grass pollen, possibly together with other, complementary methods for single pollen chemical characterization.
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Affiliation(s)
- Sabrina Diehn
- Department of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 2, 12489, Berlin, Germany
| | - Boris Zimmermann
- Faculty of Science and Technology, Norwegian University of Life Sciences, 1432, Ås, Norway
| | - Valeria Tafintseva
- Faculty of Science and Technology, Norwegian University of Life Sciences, 1432, Ås, Norway
| | - Murat Bağcıoğlu
- Faculty of Science and Technology, Norwegian University of Life Sciences, 1432, Ås, Norway
| | - Achim Kohler
- Faculty of Science and Technology, Norwegian University of Life Sciences, 1432, Ås, Norway
| | - Mikael Ohlson
- Faculty of Environmental Sciences and Natural Resource Management, Norwegian University of Life Sciences, 1432, Ås, Norway
| | - Siri Fjellheim
- Faculty of Biosciences, Norwegian University of Life Sciences, 1432, Ås, Norway
| | - Janina Kneipp
- Department of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 2, 12489, Berlin, Germany.
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Diehn S, Zimmermann B, Tafintseva V, Seifert S, Bağcıoğlu M, Ohlson M, Weidner S, Fjellheim S, Kohler A, Kneipp J. Combining Chemical Information From Grass Pollen in Multimodal Characterization. FRONTIERS IN PLANT SCIENCE 2019; 10:1788. [PMID: 32082348 PMCID: PMC7005252 DOI: 10.3389/fpls.2019.01788] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2019] [Accepted: 12/20/2019] [Indexed: 05/06/2023]
Abstract
The analysis of pollen chemical composition is important to many fields, including agriculture, plant physiology, ecology, allergology, and climate studies. Here, the potential of a combination of different spectroscopic and spectrometric methods regarding the characterization of small biochemical differences between pollen samples was evaluated using multivariate statistical approaches. Pollen samples, collected from three populations of the grass Poa alpina, were analyzed using Fourier-transform infrared (FTIR) spectroscopy, Raman spectroscopy, surface enhanced Raman scattering (SERS), and matrix assisted laser desorption/ionization mass spectrometry (MALDI-TOF MS). The variation in the sample set can be described in a hierarchical framework comprising three populations of the same grass species and four different growth conditions of the parent plants for each of the populations. Therefore, the data set can work here as a model system to evaluate the classification and characterization ability of the different spectroscopic and spectrometric methods. ANOVA Simultaneous Component Analysis (ASCA) was applied to achieve a separation of different sources of variance in the complex sample set. Since the chosen methods and sample preparations probe different parts and/or molecular constituents of the pollen grains, complementary information about the chemical composition of the pollen can be obtained. By using consensus principal component analysis (CPCA), data from the different methods are linked together. This enables an investigation of the underlying global information, since complementary chemical data are combined. The molecular information from four spectroscopies was combined with phenotypical information gathered from the parent plants, thereby helping to potentially link pollen chemistry to other biotic and abiotic parameters.
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Affiliation(s)
- Sabrina Diehn
- Department of Chemistry, Humboldt-Universität zu Berlin, Berlin, Germany
- BAM Federal Institute for Materials Research and Testing, Berlin, Germany
| | - Boris Zimmermann
- Faculty of Science and Technology, Norwegian University of Life Sciences, Ås, Norway
| | - Valeria Tafintseva
- Faculty of Science and Technology, Norwegian University of Life Sciences, Ås, Norway
| | - Stephan Seifert
- Department of Chemistry, Humboldt-Universität zu Berlin, Berlin, Germany
- BAM Federal Institute for Materials Research and Testing, Berlin, Germany
| | - Murat Bağcıoğlu
- Faculty of Science and Technology, Norwegian University of Life Sciences, Ås, Norway
| | - Mikael Ohlson
- Faculty of Environmental Sciences and Natural Resource Management, Norwegian University of Life Sciences, Ås, Norway
| | - Steffen Weidner
- BAM Federal Institute for Materials Research and Testing, Berlin, Germany
| | - Siri Fjellheim
- Faculty of Biosciences, Norwegian University of Life Sciences, Ås, Norway
| | - Achim Kohler
- Faculty of Science and Technology, Norwegian University of Life Sciences, Ås, Norway
- Nofima AS, Ås, Norway
| | - Janina Kneipp
- Department of Chemistry, Humboldt-Universität zu Berlin, Berlin, Germany
- BAM Federal Institute for Materials Research and Testing, Berlin, Germany
- *Correspondence: Janina Kneipp,
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