Image-Based Methods to Score Fungal Pathogen Symptom Progression and Severity in Excised Arabidopsis Leaves
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Helsinki (Finland). Viikki Plant Science Center; Univ. of Helsinki (Finland). National Plant Phenotyping Infrastructure
- Univ. of Helsinki (Finland). Viikki Plant Science Center
- Univ. of Helsinki (Finland). Viikki Plant Science Center; Univ. of Helsinki (Finland). National Plant Phenotyping Infrastructure; Natural Resources Inst. (Luke), Piikkio (Finland)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States). Bredesen Center for Interdisciplinary Research
- Univ. of Helsinki (Finland). Viikki Plant Science Center; Univ. of Helsinki (Finland). National Plant Phenotyping Infrastructure
Image-based symptom scoring of plant diseases is a powerful tool for associating disease resistance with plant genotypes. Advancements in technology have enabled new imaging and image processing strategies for statistical analysis of time-course experiments. There are several tools available for analyzing symptoms on leaves and fruits of crop plants, but only a few are available for the model plant Arabidopsis thaliana (Arabidopsis). Arabidopsis and the model fungus Botrytis cinerea (Botrytis) comprise a potent model pathosystem for the identification of signaling pathways conferring immunity against this broad host-range necrotrophic fungus. Here, we present two strategies to assess severity and symptom progression of Botrytis infection over time in Arabidopsis leaves. Thus, a pixel classification strategy using color hue values from red-green-blue (RGB) images and a random forest algorithm was used to establish necrotic, chlorotic, and healthy leaf areas. Secondly, using chlorophyll fluorescence (ChlFl) imaging, the maximum quantum yield of photosystem II (Fv/Fm) was determined to define diseased areas and their proportion per total leaf area. Both RGB and ChlFl imaging strategies were employed to track disease progression over time. This has provided a robust and sensitive method for detecting sensitive or resistant genetic backgrounds. A full methodological workflow, from plant culture to data analysis, is described.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Biological and Environmental Research (BER); Academy of Finland
- Grant/Contract Number:
- AC05-00OR22725; 283138; 256094; 25097
- OSTI ID:
- 1761615
- Journal Information:
- Plants, Vol. 10, Issue 1; ISSN 2223-7747
- Publisher:
- MDPICopyright Statement
- Country of Publication:
- United States
- Language:
- English
Similar Records
Ozone injury and infection of potato leaves by Botrytis cinerea
Air pollution injury of potato in Michigan