Abstract
Plant diseases are responsible for major economic losses in the agricultural industry worldwide. Monitoring plant health and detecting pathogen early are essential to reduce disease spread and facilitate effective management practices. DNA-based and serological methods now provide essential tools for accurate plant disease diagnosis, in addition to the traditional visual scouting for symptoms. Although DNA-based and serological methods have revolutionized plant disease detection, they are not very reliable at asymptomatic stage, especially in case of pathogen with systemic diffusion. They need at least 1–2 days for sample harvest, processing, and analysis. Here, we describe modern methods based on nucleic acid and protein analysis. Then, we review innovative approaches currently under development. Our main findings are the following: (1) novel sensors based on the analysis of host responses, e.g., differential mobility spectrometer and lateral flow devices, deliver instantaneous results and can effectively detect early infections directly in the field; (2) biosensors based on phage display and biophotonics can also detect instantaneously infections although they can be integrated with other systems; and (3) remote sensing techniques coupled with spectroscopy-based methods allow high spatialization of results, these techniques may be very useful as a rapid preliminary identification of primary infections. We explain how these tools will help plant disease management and complement serological and DNA-based methods. While serological and PCR-based methods are the most available and effective to confirm disease diagnosis, volatile and biophotonic sensors provide instantaneous results and may be used to identify infections at asymptomatic stages. Remote sensing technologies will be extremely helpful to greatly spatialize diagnostic results. These innovative techniques represent unprecedented tools to render agriculture more sustainable and safe, avoiding expensive use of pesticides in crop protection.







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Abbreviations
- ANN:
-
Artificial neural networks
- APAR:
-
Absorbed photosynthetic active radiation
- ARDRA:
-
Amplified 16S ribosomal DNA restriction analysis
- AVIRIS:
-
Airborne visible/infrared imaging spectrometer
- BAW:
-
Beet armyworms
- BLAST:
-
Basic local alignment search tool
- CDR:
-
Complementary determining regions
- CMV:
-
Cucumber mosaic virus
- Co-PCR:
-
Cooperative PCR
- DMNT:
-
Dimethylonatriene
- DMS:
-
Differential mobility spectrometry
- dNTP:
-
Nucleoside triphosphates containing deoxyribose
- dsDNA:
-
Double-stranded DNA
- ELISA:
-
Enzyme-linked immunosorbent assay
- EnMAP:
-
Environmental mapping and analysis program
- EO:
-
Earth observation
- EPPO:
-
European and Mediterranean Plant Protection Organization
- FAIMS:
-
High field asymmetric waveform ion mobility spectrometry
- FAO:
-
Food and Agriculture Organization
- FISH:
-
Fluorescence in situ hybridization
- GC-MS:
-
Gas chromatography mass spectrometry
- ICA-PCA:
-
Independent-principal components analysis
- LAMP:
-
Loop-mediated isothermal amplification
- LAI:
-
Leaf Area Index
- Landsat TM:
-
Earth Resources Technology Satellite Thematic Mapper
- LFM:
-
Lateral flow microarrays
- M-PCR:
-
Multiplex PCR
- MVA:
-
Multivariate data analysis
- NASBA:
-
Nucleic acid sequence-based amplification
- NIR:
-
Near-infrared wavelength
- NMR:
-
Nuclear magnetic resonance
- nPCR:
-
Nested PCR
- PCA:
-
Principal component analysis
- PFGE:
-
Pulsed-field gel electrophoresis
- PCR:
-
Polymerase chain reaction
- PDD:
-
Plant disease detection
- PLRV:
-
Potato leafroll virus
- PPV:
-
Plum pox potyvirus
- PRISMA:
-
PRecursore IperSpettrale della Missione Applicativa
- PTR-MS:
-
Proton-transfer-reaction mass spectrometry
- RAPD:
-
Random amplified polymorphic DNA
- rep-PCR:
-
Repetitive-sequence PCR
- RFLP:
-
Restriction fragment length polymorphism
- RS:
-
Remote sensing
- RTM:
-
Radiative transfer modeling
- RT-PCR:
-
Real-time PCR
- SAIL:
-
Scattering by arbitrarily inclined leaves
- SAM:
-
Spectral angle mapper classification
- SBSE:
-
Stir bar sorptive extraction
- scFv:
-
Single-chain variable fragment
- SELEX:
-
Systematic evolution of ligands by exponential enrichment
- SIFT-MS:
-
Selected ion flow tube mass spectrometry
- SMA:
-
Spectral mixture analysis
- SPME:
-
Solid-phase microextraction
- ssDNA:
-
Single-stranded DNA
- SNP:
-
Single nucleotide polymophisms
- SSEM:
-
Serologically specific electron microscopy
- ssRNA:
-
Single-stranded RNA
- STR:
-
Short tandem repeats
- SVIs:
-
Spectral vegetation indices
- SVM:
-
Support vector machine
- SWIR:
-
Shortwave infrared wavelength
- TIR:
-
Thermal infrared wavelength
- TMTT:
-
trimethyltridecatetraene
- TYLCD:
-
Tomato yellow leaf curl disease
- UAV:
-
Unmanned aerial vehicle
- VI:
-
Vegetation indices
- VIS:
-
Visible wavelength
- VOC:
-
Volatile organic compounds
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Acknowledgments
We are grateful to Chiara Nepi for providing iconographic materials. We thank Minghua Zhang and colleagues for permission to use their data in our Fig. 4 and Jorge Torres-Sánchez and colleagues for permission to use their picture in our Fig. 5. CED was supported by the California Citrus Research Board (CRB), the Industry-University Cooperative Research Program (UC Discovery), the Florida Citrus Production Advisory Council (FCPRAC), and the National Science Foundation (no. 1255915).
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Glossary
- HyMap™
-
is a hyperspectral scanner that provides 128 bands across the reflective solar wavelength region of 0.45–2.5 μm with contiguous spectral coverage and bandwidths between 15 and 20 nm.
- Omic
-
refers to a field of study in biology aiming at the collective characterization of pools of biological molecules that translate into the function of organisms.
- Microarrays
-
integrate laboratory functions on a millimetric chip on a solid substrate (e.g., glass slide or silicon films) that assays large amounts of biological material using high-throughput screening miniaturized, multiplexed, and parallel processing and detection methods.
- PROSPECT
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is a radiative transfer model based on the Allen’ plate model used by remote sensing techniques.
- RGB
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is an additive color model in which red, green, and blue light is added together in various ways to reproduce a broad array of colors.
- SYBR® Green
-
is an asymmetrical cyanine dye used as a nucleic acid which absorbs blue light (λ max = 497 nm) and emits green light (λ max = 520 nm).
- Trascriptome
-
is used to address a specific object of a specific field of study in biology. It refers to the set of all RNA molecules produced in a population of cells. It differs from the exome, the sequences which when transcribed remain within the mature RNA after introns are removed by RNA splicing.
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Martinelli, F., Scalenghe, R., Davino, S. et al. Advanced methods of plant disease detection. A review. Agron. Sustain. Dev. 35, 1–25 (2015). https://doi.org/10.1007/s13593-014-0246-1
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DOI: https://doi.org/10.1007/s13593-014-0246-1