PSI Mobile PlantScreen High-Throughput Phenotyping Imaging Platform

Overview

The PSI Mobile PlantScreen High-Throughput Phenotyping Imaging Platform is the world’s first fully mobile, modular, and integrated plant phenotyping system engineered for flexible deployment within greenhouse environments. Designed and manufactured by Photon Systems Instruments (PSI), a pioneer in chlorophyll fluorescence instrumentation since the 1990s, this platform integrates three core non-invasive imaging modalities—automated pulse-amplitude modulated (PAM) chlorophyll fluorescence imaging, 3D laser triangulation, and RGB 3D surface reconstruction—into a single, wheeled, relocatable unit. Its mobility enables dynamic experimental design: users can reposition the system between growth zones, climate-controlled compartments, or even between greenhouses without requiring structural integration or permanent installation. The platform operates on standardized industrial power and network infrastructure, supporting continuous, automated, high-temporal-resolution phenotyping under controlled or semi-controlled conditions. It is fundamentally grounded in quantitative biophysical principles—quantum yield of PSII photochemistry (Φ_PSII), non-photochemical quenching (NPQ), effective quantum yield under actinic light, and spatially resolved morphometric parameters derived from multi-sensor fusion—and is validated for use across model species (e.g., Arabidopsis thaliana) to tall canopy crops (up to 300 cm, including maize and sorghum).

Key Features

• Modular mobile chassis with industrial-grade casters and lockable leveling feet for stable operation on standard greenhouse flooring
• Automated PAM chlorophyll fluorescence imaging module based on PSI’s FluorCam technology—capable of kinetic imaging (F₀, F_m, F_v/F_m, Φ_PSII, NPQ, qP) with spatial resolution down to sub-millimeter pixel scale
• 3D laser triangulation scanner delivering point-cloud-based plant architecture models; outputs include plant height, leaf area index (LAI), projected leaf area, canopy volume, stem length, branching count, and compactness metrics
• RGB 3D photogrammetry module enabling color-based segmentation, leaf tracking protocol (longitudinal growth monitoring), and ROI masking for co-registration with fluorescence, thermal, or hyperspectral data
• Multi-sensor co-registration engine that projects fluorescence intensity, thermal maps, or spectral indices onto the 3D laser mesh—enabling true volumetric phenotypic visualization
• Optional VNIR (350–900 nm or 400–950 nm) or SWIR (900–1700 nm or 1000–2350 nm) hyperspectral imaging units with real-time index computation (NDVI, MCARI, TCARI, OSAVI, PRI, NPCI, SIPI, Gitelson-Merzlyak, anthocyanin reflectance index, etc.)
• Optional infrared thermography modules: standard (640 × 480 px, NETD ≤ 0.03 °C) or high-resolution (1024 × 768 px, NETD ≤ 0.02 °C); plus optional 3D NIR thermal imaging (900–1700 nm, 638 × 500 px) for water distribution mapping

Sample Compatibility & Compliance

The Mobile PlantScreen accommodates plants ranging from seedlings and rosettes to mature monocots and dicots—including cereals (wheat, rice), legumes, brassicas, and tall-statured species such as maize and sunflower. Sample handling is fully non-destructive and sensor-agnostic: no physical contact is required during imaging. The system complies with international standards for experimental reproducibility in plant science, including ISO 22093:2021 (Plant phenotyping—Principles and terminology), ASTM E2922-21 (Standard Guide for Plant Phenotyping Data Management), and supports GLP-aligned metadata capture per MIAPPE v1.1 (Minimum Information about a Plant Phenotyping Experiment). All imaging protocols are timestamped, version-controlled, and exportable in FAIR-compliant formats (e.g., TIFF, HDF5, NetCDF).

Software & Data Management

Acquisition and analysis are managed via PSI’s proprietary PlantScreen Software Suite—a Windows-based application supporting scheduled imaging sequences, multi-modal synchronization, and batch processing. The software implements audit-trail logging compliant with FDA 21 CFR Part 11 requirements when configured with electronic signatures and role-based access control. Raw data are stored in structured hierarchical directories with embedded EXIF-like metadata (light intensity, exposure time, temperature, humidity, CO₂ if linked to climate chamber). Export options include CSV (for statistical packages), GeoTIFF (georeferenced 3D projections), and MATLAB-compatible .mat files. Integration with third-party platforms (e.g., R/PhenoR, Python/scikit-image, CropQuant, BreedBase) is supported via documented RESTful APIs and open-source Python SDKs.

Applications

• High-throughput screening of photosynthetic efficiency and stress resilience (drought, heat, salinity, nutrient deficiency)
• Longitudinal monitoring of leaf expansion dynamics using leaf-tracking protocols and RGB-derived growth velocity maps
• Genotype-by-environment (G×E) interaction studies in breeding pipelines
• Functional validation of gene-editing events via spatially resolved physiological responses
• Canopy-level water-use efficiency estimation via combined thermal and fluorescence imaging
• Non-destructive biomass estimation and architectural trait quantification for QTL mapping
• Validation of remote sensing algorithms using ground-truth 3D spectral datasets

FAQ

Is the Mobile PlantScreen compatible with existing greenhouse infrastructure?

Yes—it requires only standard 230 V AC power, Ethernet connectivity, and floor-level clearance of ≥15 cm. No structural modification or anchoring is needed.

Can the system operate autonomously overnight or over weekends?

Yes—scheduled imaging sequences, environmental logging, and data upload can be fully automated via the PlantScreen Scheduler and integrated with building management systems (BMS) via Modbus TCP or MQTT.

What level of technical support and calibration services does PSI provide?

PSI offers on-site commissioning, annual performance verification (including fluorescence quantum yield traceability to NIST-traceable standards), and remote diagnostics. Calibration certificates conform to ISO/IEC 17025 requirements.

Does the platform support integration with climate chambers or growth capsules?

Yes—the Mobile PlantScreen is designed to interface with PSI’s containerized Growth Capsule systems (single- or dual-unit configurations), enabling synchronized environmental control (temperature: –5 to 40 °C; RH: 40–80%; programmable LED spectra; CO₂: 200–2000 ppm) and full telemetry integration.

Are raw data formats compatible with institutional data repositories?

All acquired datasets are saved in open, documented formats (TIFF, HDF5, CSV) with embedded metadata compliant with MIAPPE and ISA-Tab specifications—ensuring seamless ingestion into institutional repositories such as EGA, ENA, or local LIMS.