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Koneswarakantha B, Adyanthaya R, Emerson J, Collin F, Keller A, Mattheus M, Spyroglou I, Donevska S, Ménard T. An Open-Source R Package for Detection of Adverse Events Under-Reporting in Clinical Trials: Implementation and Validation by the IMPALA (Inter coMPany quALity Analytics) Consortium. Ther Innov Regul Sci 2024:10.1007/s43441-024-00631-8. [PMID: 38564178 DOI: 10.1007/s43441-024-00631-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Accepted: 02/09/2024] [Indexed: 04/04/2024]
Abstract
Accurate and timely reporting of adverse events (AEs) in clinical trials is crucial to ensuring data integrity and patient safety. However, AE under-reporting remains a challenge, often highlighted in Good Clinical Practice (GCP) audits and inspections. Traditional detection methods, such as on-site investigator audits via manual source data verification (SDV), have limitations. Addressing this, the open-source R package {simaerep} was developed to facilitate rapid, comprehensive, and near-real-time detection of AE under-reporting at each clinical trial site. This package leverages patient-level AE and visit data for its analyses. To validate its efficacy, three member companies from the Inter coMPany quALity Analytics (IMPALA) consortium independently assessed the package. Results showed that {simaerep} consistently and effectively identified AE under-reporting across all three companies, particularly when there were significant differences in AE rates between compliant and non-compliant sites. Furthermore, {simaerep}'s detection rates surpassed heuristic methods, and it identified 50% of all detectable sites as early as 25% into the designated study duration. The open-source package can be embedded into audits to enable fast, holistic, and repeatable quality oversight of clinical trials.
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Affiliation(s)
| | | | - Jennifer Emerson
- Boehringer Ingelheim Pharma GmbH & Co, 88397, Biberach an der Riss, Germany
| | - Frederik Collin
- Boehringer Ingelheim Pharma GmbH & Co, 88397, Biberach an der Riss, Germany
| | - Annett Keller
- Boehringer Ingelheim Pharma GmbH & Co, 55216, Ingelheim, Germany
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2
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Samalova M, Melnikava A, Elsayad K, Peaucelle A, Gahurova E, Gumulec J, Spyroglou I, Zemlyanskaya EV, Ubogoeva EV, Balkova D, Demko M, Blavet N, Alexiou P, Benes V, Mouille G, Hejatko J. Hormone-regulated expansins: Expression, localization, and cell wall biomechanics in Arabidopsis root growth. Plant Physiol 2023; 194:209-228. [PMID: 37073485 PMCID: PMC10762514 DOI: 10.1093/plphys/kiad228] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Revised: 03/24/2023] [Accepted: 03/24/2023] [Indexed: 05/03/2023]
Abstract
Expansins facilitate cell expansion by mediating pH-dependent cell wall (CW) loosening. However, the role of expansins in controlling CW biomechanical properties in specific tissues and organs remains elusive. We monitored hormonal responsiveness and spatial specificity of expression and localization of expansins predicted to be the direct targets of cytokinin signaling in Arabidopsis (Arabidopsis thaliana). We found EXPANSIN1 (EXPA1) homogenously distributed throughout the CW of columella/lateral root cap, while EXPA10 and EXPA14 localized predominantly at 3-cell boundaries in the epidermis/cortex in various root zones. EXPA15 revealed cell-type-specific combination of homogenous vs. 3-cell boundaries localization. By comparing Brillouin frequency shift and AFM-measured Young's modulus, we demonstrated Brillouin light scattering (BLS) as a tool suitable for non-invasive in vivo quantitative assessment of CW viscoelasticity. Using both BLS and AFM, we showed that EXPA1 overexpression upregulated CW stiffness in the root transition zone (TZ). The dexamethasone-controlled EXPA1 overexpression induced fast changes in the transcription of numerous CW-associated genes, including several EXPAs and XYLOGLUCAN:XYLOGLUCOSYL TRANSFERASEs (XTHs), and associated with rapid pectin methylesterification determined by in situ Fourier-transform infrared spectroscopy in the root TZ. The EXPA1-induced CW remodeling is associated with the shortening of the root apical meristem, leading to root growth arrest. Based on our results, we propose that expansins control root growth by a delicate orchestration of CW biomechanical properties, possibly regulating both CW loosening and CW remodeling.
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Affiliation(s)
- Marketa Samalova
- CEITEC – Central European Institute of Technology, Masaryk University, Brno 625 00, Czech Republic
- Department of Experimental Biology, Faculty of Science, Masaryk University, Brno 625 00, Czech Republic
| | - Alesia Melnikava
- CEITEC – Central European Institute of Technology, Masaryk University, Brno 625 00, Czech Republic
- National Centre for Biomolecular Research, Faculty of Science, Masaryk University, Brno 625 00, Czech Republic
| | - Kareem Elsayad
- Division of Anatomy, Centre for Anatomy & Cell Biology, Medical University of Vienna, Vienna 1090, Austria
| | | | - Evelina Gahurova
- CEITEC – Central European Institute of Technology, Masaryk University, Brno 625 00, Czech Republic
- National Centre for Biomolecular Research, Faculty of Science, Masaryk University, Brno 625 00, Czech Republic
| | - Jaromir Gumulec
- Department of Pathological Physiology, Faculty of Medicine, Masaryk University, Brno 625 00, Czech Republic
| | - Ioannis Spyroglou
- CEITEC – Central European Institute of Technology, Masaryk University, Brno 625 00, Czech Republic
| | - Elena V Zemlyanskaya
- Department of Natural Sciences, Novosibirsk State University, Novosibirsk 630073, Russia
- Institute of Cytology and Genetics, Siberian Branch of Russian Academy of Sciences, Novosibirsk 630090, Russia
| | - Elena V Ubogoeva
- Institute of Cytology and Genetics, Siberian Branch of Russian Academy of Sciences, Novosibirsk 630090, Russia
| | - Darina Balkova
- CEITEC – Central European Institute of Technology, Masaryk University, Brno 625 00, Czech Republic
- Department of Experimental Biology, Faculty of Science, Masaryk University, Brno 625 00, Czech Republic
| | - Martin Demko
- CEITEC – Central European Institute of Technology, Masaryk University, Brno 625 00, Czech Republic
| | - Nicolas Blavet
- CEITEC – Central European Institute of Technology, Masaryk University, Brno 625 00, Czech Republic
| | - Panagiotis Alexiou
- CEITEC – Central European Institute of Technology, Masaryk University, Brno 625 00, Czech Republic
| | - Vladimir Benes
- Genomics Core Facility, European Molecular Biology Laboratory, Heidelberg 69117, Germany
| | | | - Jan Hejatko
- CEITEC – Central European Institute of Technology, Masaryk University, Brno 625 00, Czech Republic
- National Centre for Biomolecular Research, Faculty of Science, Masaryk University, Brno 625 00, Czech Republic
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Balakhonova V, Dobisova T, Benedikty Z, Panzarova K, Pytela J, Koci R, Spyroglou I, Kovacova I, Arnaud D, Skalak J, Trtilek M, Hejatko J. iReenCAM: automated imaging system for kinetic analysis of photosynthetic pigment biosynthesis at high spatiotemporal resolution during early deetiolation. Front Plant Sci 2023; 14:1093292. [PMID: 37152154 PMCID: PMC10160634 DOI: 10.3389/fpls.2023.1093292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Accepted: 04/04/2023] [Indexed: 05/09/2023]
Abstract
Seedling de-etiolation is one of the key stages of the plant life cycle, characterized by a strong rearrangement of the plant development and metabolism. The conversion of dark accumulated protochlorophyllide to chlorophyll in etioplasts of de-etiolating plants is taking place in order of ns to µs after seedlings illumination, leading to detectable increase of chlorophyll levels in order of minutes after de-etiolation initiation. The highly complex chlorophyll biosynthesis integrates number of regulatory events including light and hormonal signaling, thus making de-etiolation an ideal model to study the underlying molecular mechanisms. Here we introduce the iReenCAM, a novel tool designed for non-invasive fluorescence-based quantitation of early stages of chlorophyll biosynthesis during de-etiolation with high spatial and temporal resolution. iReenCAM comprises customized HW configuration and optimized SW packages, allowing synchronized automated measurement and analysis of the acquired fluorescence image data. Using the system and carefully optimized protocol, we show tight correlation between the iReenCAM monitored fluorescence and HPLC measured chlorophyll accumulation during first 4h of seedling de-etiolation in wild type Arabidopsis and mutants with disturbed chlorophyll biosynthesis. Using the approach, we demonstrate negative effect of exogenously applied cytokinins and ethylene on chlorophyll biosynthesis during early de-etiolation. Accordingly, we identify type-B response regulators, the cytokinin-responsive transcriptional activators ARR1 and ARR12 as negative regulators of early chlorophyll biosynthesis, while contrasting response was observed in case of EIN2 and EIN3, the components of canonical ethylene signaling cascade. Knowing that, we propose the use of iReenCAM as a new phenotyping tool, suitable for quantitative and robust characterization of the highly dynamic response of seedling de-etiolation.
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Affiliation(s)
- Veronika Balakhonova
- CEITEC - Central European Institute of Technology, Masaryk University, Brno, Czechia
- National Centre for Biomolecular Research, Faculty of Science, Masaryk University, Brno, Czechia
| | - Tereza Dobisova
- CEITEC - Central European Institute of Technology, Masaryk University, Brno, Czechia
- National Centre for Biomolecular Research, Faculty of Science, Masaryk University, Brno, Czechia
| | | | | | | | - Radka Koci
- Photon Systems Instruments, Drasov, Czechia
| | - Ioannis Spyroglou
- CEITEC - Central European Institute of Technology, Masaryk University, Brno, Czechia
| | - Ingrid Kovacova
- CEITEC - Central European Institute of Technology, Masaryk University, Brno, Czechia
| | - Dominique Arnaud
- CEITEC - Central European Institute of Technology, Masaryk University, Brno, Czechia
| | - Jan Skalak
- CEITEC - Central European Institute of Technology, Masaryk University, Brno, Czechia
| | | | - Jan Hejatko
- CEITEC - Central European Institute of Technology, Masaryk University, Brno, Czechia
- National Centre for Biomolecular Research, Faculty of Science, Masaryk University, Brno, Czechia
- *Correspondence: Jan Hejatko,
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Sorrentino M, Panzarová K, Spyroglou I, Spíchal L, Buffagni V, Ganugi P, Rouphael Y, Colla G, Lucini L, De Diego N. Integration of Phenomics and Metabolomics Datasets Reveals Different Mode of Action of Biostimulants Based on Protein Hydrolysates in Lactuca sativa L. and Solanum lycopersicum L. Under Salinity. Front Plant Sci 2022; 12:808711. [PMID: 35185959 PMCID: PMC8851396 DOI: 10.3389/fpls.2021.808711] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Accepted: 12/21/2021] [Indexed: 05/27/2023]
Abstract
Plant phenomics is becoming a common tool employed to characterize the mode of action of biostimulants. A combination of this technique with other omics such as metabolomics can offer a deeper understanding of a biostimulant effect in planta. However, the most challenging part then is the data analysis and the interpretation of the omics datasets. In this work, we present an example of how different tools, based on multivariate statistical analysis, can help to simplify the omics data and extract the relevant information. We demonstrate this by studying the effect of protein hydrolysate (PH)-based biostimulants derived from different natural sources in lettuce and tomato plants grown in controlled conditions and under salinity. The biostimulants induced different phenotypic and metabolomic responses in both crops. In general, they improved growth and photosynthesis performance under control and salt stress conditions, with better performance in lettuce. To identify the most significant traits for each treatment, a random forest classifier was used. Using this approach, we found out that, in lettuce, biomass-related parameters were the most relevant traits to evaluate the biostimulant mode of action, with a better response mainly connected to plant hormone regulation. However, in tomatoes, the relevant traits were related to chlorophyll fluorescence parameters in combination with certain antistress metabolites that benefit the electron transport chain, such as 4-hydroxycoumarin and vitamin K1 (phylloquinone). Altogether, we show that to go further in the understanding of the use of biostimulants as plant growth promotors and/or stress alleviators, it is highly beneficial to integrate more advanced statistical tools to deal with the huge datasets obtained from the -omics to extract the relevant information.
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Affiliation(s)
- Mirella Sorrentino
- Photon Systems Instruments (PSI), spol. S.r.o., Drásov, Czechia
- Department of Agricultural Sciences, University of Naples Federico II, Portici, Italy
| | - Klára Panzarová
- Photon Systems Instruments (PSI), spol. S.r.o., Drásov, Czechia
| | - Ioannis Spyroglou
- Plant Sciences Core Facility, Central European Institute of Technology, Masaryk University, Brno, Czechia
| | - Lukáš Spíchal
- Centre of the Region Haná for Biotechnological and Agricultural Research, Czech Advanced Technology and Research Institute, Palacký University, Olomouc, Czechia
| | - Valentina Buffagni
- Department for Sustainable Food Process, DiSTAS, Università Cattolica del Sacro Cuore, Piacenza, Italy
| | - Paola Ganugi
- Department for Sustainable Food Process, DiSTAS, Università Cattolica del Sacro Cuore, Piacenza, Italy
| | - Youssef Rouphael
- Department of Agricultural Sciences, University of Naples Federico II, Portici, Italy
| | - Giuseppe Colla
- Department of Agriculture and Forest Sciences, University of Tuscia, Viterbo, Italy
| | - Luigi Lucini
- Department for Sustainable Food Process, DiSTAS, Università Cattolica del Sacro Cuore, Piacenza, Italy
| | - Nuria De Diego
- Centre of the Region Haná for Biotechnological and Agricultural Research, Czech Advanced Technology and Research Institute, Palacký University, Olomouc, Czechia
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Mácová K, Prabhullachandran U, Štefková M, Spyroglou I, Pěnčík A, Endlová L, Novák O, Robert HS. Long-Term High-Temperature Stress Impacts on Embryo and Seed Development in Brassica napus. Front Plant Sci 2022; 13:844292. [PMID: 35528932 PMCID: PMC9075611 DOI: 10.3389/fpls.2022.844292] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2021] [Accepted: 03/29/2022] [Indexed: 05/22/2023]
Abstract
Brassica napus (rapeseed) is the second most important oilseed crop worldwide. Global rise in average ambient temperature and extreme weather severely impact rapeseed seed yield. However, fewer research explained the phenotype changes caused by moderate-to-high temperatures in rapeseed. To investigate these events, we determined the long-term response of three spring cultivars to different temperature regimes (21/18°C, 28/18°C, and 34/18°C) mimicking natural temperature variations. The analysis focused on the plant appearance, seed yield, quality and viability, and embryo development. Our microscopic observations suggest that embryonic development is accelerated and defective in high temperatures. Reduced viable seed yield at warm ambient temperature is due to a reduced fertilization rate, increased abortion rate, defective embryonic development, and pre-harvest sprouting. Reduced auxin levels in young seeds and low ABA and auxin levels in mature seeds may cause embryo pattern defects and reduced seed dormancy, respectively. Glucosinolates and oil composition measurements suggest reduced seed quality. These identified cues help understand seed thermomorphogenesis and pave the way to developing thermoresilient rapeseed.
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Affiliation(s)
- Kateřina Mácová
- National Centre for Biomolecular Research, Faculty of Science, Masaryk University, Brno, Czechia
- Hormonal Crosstalk in Plant Development, Mendel Center for Plant Genomics and Proteomics, CEITEC MU-Central European Institute of Technology, Masaryk University, Brno, Czechia
| | - Unnikannan Prabhullachandran
- National Centre for Biomolecular Research, Faculty of Science, Masaryk University, Brno, Czechia
- Hormonal Crosstalk in Plant Development, Mendel Center for Plant Genomics and Proteomics, CEITEC MU-Central European Institute of Technology, Masaryk University, Brno, Czechia
| | - Marie Štefková
- Hormonal Crosstalk in Plant Development, Mendel Center for Plant Genomics and Proteomics, CEITEC MU-Central European Institute of Technology, Masaryk University, Brno, Czechia
| | - Ioannis Spyroglou
- Plant Sciences Core Facility, Mendel Center for Plant Genomics and Proteomics, CEITEC MU-Central European Institute of Technology, Masaryk University, Brno, Czechia
| | - Aleš Pěnčík
- Laboratory of Growth Regulators, Faculty of Science, Palacký University and Institute of Experimental Botany, The Czech Academy of Sciences, Olomouc, Czechia
| | | | - Ondřej Novák
- Laboratory of Growth Regulators, Faculty of Science, Palacký University and Institute of Experimental Botany, The Czech Academy of Sciences, Olomouc, Czechia
| | - Hélène S Robert
- Hormonal Crosstalk in Plant Development, Mendel Center for Plant Genomics and Proteomics, CEITEC MU-Central European Institute of Technology, Masaryk University, Brno, Czechia
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6
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Lyčka M, Peska V, Demko M, Spyroglou I, Kilar A, Fajkus J, Fojtová M. WALTER: an easy way to online evaluate telomere lengths from terminal restriction fragment analysis. BMC Bioinformatics 2021; 22:145. [PMID: 33752601 PMCID: PMC7986547 DOI: 10.1186/s12859-021-04064-0] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Accepted: 03/07/2021] [Indexed: 12/29/2022] Open
Abstract
BACKGROUND Telomeres, nucleoprotein structures comprising short tandem repeats and delimiting the ends of linear eukaryotic chromosomes, play an important role in the maintenance of genome stability. Therefore, the determination of the length of telomeres is of high importance for many studies. Over the last years, new methods for the analysis of the length of telomeres have been developed, including those based on PCR or analysis of NGS data. Despite that, terminal restriction fragment (TRF) method remains the gold standard to this day. However, this method lacks universally accepted and precise tool capable to analyse and statistically evaluate TRF results. RESULTS To standardize the processing of TRF results, we have developed WALTER, an online toolset allowing rapid, reproducible, and user-friendly analysis including statistical evaluation of the data. Given its web-based nature, it provides an easily accessible way to analyse TRF data without any need to install additional software. CONCLUSIONS WALTER represents a major upgrade from currently available tools for the image processing of TRF scans. This toolset enables a rapid, highly reproducible, and user-friendly evaluation of almost any TRF scan including in-house statistical evaluation of the data. WALTER platform together with user manual describing the evaluation of TRF scans in detail and presenting tips and troubleshooting, as well as test data to demo the software are available at https://www.ceitec.eu/chromatin-molecular-complexes-jiri-fajkus/rg51/tab?tabId=125#WALTER and the source code at https://github.com/mlyc93/WALTER .
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Affiliation(s)
- Martin Lyčka
- Mendel Centre for Plant Genomics and Proteomics, Central European Institute of Technology (CEITEC), Masaryk University, 625 00, Brno, Czech Republic
- National Centre for Biomolecular Research, Faculty of Science, Masaryk University, 625 00, Brno, Czech Republic
| | - Vratislav Peska
- Institute of Biophysics, Academy of Sciences of the Czech Republic, v.v.i., 612 00, Brno, Czech Republic.
| | - Martin Demko
- Core Facility Bioinformatics, Central European Institute of Technology (CEITEC), Masaryk University, 625 00, Brno, Czech Republic
- Faculty of Informatics, Masaryk University, 602 00, Brno, Czech Republic
| | - Ioannis Spyroglou
- Mendel Centre for Plant Genomics and Proteomics, Central European Institute of Technology (CEITEC), Masaryk University, 625 00, Brno, Czech Republic
| | - Agata Kilar
- Mendel Centre for Plant Genomics and Proteomics, Central European Institute of Technology (CEITEC), Masaryk University, 625 00, Brno, Czech Republic
- National Centre for Biomolecular Research, Faculty of Science, Masaryk University, 625 00, Brno, Czech Republic
| | - Jiří Fajkus
- Mendel Centre for Plant Genomics and Proteomics, Central European Institute of Technology (CEITEC), Masaryk University, 625 00, Brno, Czech Republic
- National Centre for Biomolecular Research, Faculty of Science, Masaryk University, 625 00, Brno, Czech Republic
- Institute of Biophysics, Academy of Sciences of the Czech Republic, v.v.i., 612 00, Brno, Czech Republic
| | - Miloslava Fojtová
- Mendel Centre for Plant Genomics and Proteomics, Central European Institute of Technology (CEITEC), Masaryk University, 625 00, Brno, Czech Republic.
- National Centre for Biomolecular Research, Faculty of Science, Masaryk University, 625 00, Brno, Czech Republic.
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Spyroglou I, Skalák J, Balakhonova V, Benedikty Z, Rigas AG, Hejátko J. Mixed Models as a Tool for Comparing Groups of Time Series in Plant Sciences. Plants (Basel) 2021; 10:plants10020362. [PMID: 33668650 PMCID: PMC7918370 DOI: 10.3390/plants10020362] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Revised: 01/22/2021] [Accepted: 02/10/2021] [Indexed: 11/16/2022]
Abstract
Plants adapt to continual changes in environmental conditions throughout their life spans. High-throughput phenotyping methods have been developed to noninvasively monitor the physiological responses to abiotic/biotic stresses on a scale spanning a long time, covering most of the vegetative and reproductive stages. However, some of the physiological events comprise almost immediate and very fast responses towards the changing environment which might be overlooked in long-term observations. Additionally, there are certain technical difficulties and restrictions in analyzing phenotyping data, especially when dealing with repeated measurements. In this study, a method for comparing means at different time points using generalized linear mixed models combined with classical time series models is presented. As an example, we use multiple chlorophyll time series measurements from different genotypes. The use of additional time series models as random effects is essential as the residuals of the initial mixed model may contain autocorrelations that bias the result. The nature of mixed models offers a viable solution as these can incorporate time series models for residuals as random effects. The results from analyzing chlorophyll content time series show that the autocorrelation is successfully eliminated from the residuals and incorporated into the final model. This allows the use of statistical inference.
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Affiliation(s)
- Ioannis Spyroglou
- Plant Sciences Core Facility, CEITEC—Central European Institute of Technology, Masaryk University, Kamenice 5, 62500 Brno, Czech Republic
- Correspondence:
| | - Jan Skalák
- Functional Genomics & Proteomics of Plants, CEITEC—Central European Institute of Technology and National Centre for Biotechnology Research, Faculty of Science, Kamenice 5, 62500 Brno, Czech Republic; (J.S.); (V.B.); (J.H.)
| | - Veronika Balakhonova
- Functional Genomics & Proteomics of Plants, CEITEC—Central European Institute of Technology and National Centre for Biotechnology Research, Faculty of Science, Kamenice 5, 62500 Brno, Czech Republic; (J.S.); (V.B.); (J.H.)
| | - Zuzana Benedikty
- Photon Systems Instruments, (PSI, spol. sr.o.), 66424 Drásov, Czech Republic;
| | - Alexandros G. Rigas
- Department of Electrical and Computer Engineering, Democritus University of Thrace, 67100 Xanthi, Greece;
| | - Jan Hejátko
- Functional Genomics & Proteomics of Plants, CEITEC—Central European Institute of Technology and National Centre for Biotechnology Research, Faculty of Science, Kamenice 5, 62500 Brno, Czech Republic; (J.S.); (V.B.); (J.H.)
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