New approaches for the early detection of tree health pests and pathogens

Lead Research Organisation: University of Oxford
Department Name: Plant Sciences

Abstract

Abstracts are not currently available in GtR for all funded research. This is normally because the abstract was not required at the time of proposal submission, but may be because it included sensitive information such as personal details.

Technical Summary

This project has 6 work packages (WP), each based around a different combination of skills and expertise. For WP2-6 there will be a focus on a particular detection technology, while WP1 will provide the technical oversight needed for effective deployment of these different technologies, as summarised:
WP1:a participatory interdisciplinary approach will be used to evaluate the needs of stakeholders and to ensure that the technologies meet these. It will also focus on the requirements of effective technology deployment, using mathematical modeling to develop sampling strategies, to create network-based risk maps and economic assessments of cost-effectiveness. Further aspects of deployment will be analysed using social science approaches including end-user acceptability and the potential for using citizen science.
WP2:analytical chemistry approaches will be used to identify diagnostic volatile organic compounds produced by pests, pathogens and diseased hosts and to translate these onto commercial-available portable platforms for use by inspectors in the field.
WP3:multispectral imaging will be used to identify markers for the early detection of biotic/abiotic stress in plants. A prototype bioimaging camera will be constructed that can be used to validate this approach in the field.
WP4:will develop mathematical models of spore movement and investigate metagenomics for broad-spectrum surveillance utilizing existing monitoring networks e.g. pollen traps. In addition, a novel integrated cyclone-based trapping and molecular detection system will be developed and evaluated.
WP5:novel semiochemical attractants will be identified for a range of wood-boring beetle pests, incorporated into traps designed for efficient detection and then deployed in a risk-based network.
WP6:methods for sampling and rapid screening water for Phytopthora spp., including 'unknowns' will be developed and validated. This will combine high-throughput sequencing with a rapid bioinformatic.

Planned Impact

The interdisciplinary design of this proposal will ensure maximum ongoing impact. Central to this is stakeholder engagement and our proposal has adopted a novel approach to facilliate this. Traditional approaches to developing new detection or diagnostic technologies have assumed the 'build it and they will come' approach; where the focus is on the technical aspects of the novel methodology, rather than the needs of end-users and the specifics of how it will be effectively deployed. This proposal reverses that by taking an inclusive view of what is required to achieve a successful outcome i.e. the deployment of a new technology that improves our biosecurity, and then co-designs technologies which fit that purpose. It achieves this by embracing an interdisciplinary approach and through establishing early engagement with stakeholders and end-users. Critical to this is the creation of a Learning Platform (Work package 1) which sits at the core of the project and cuts across the other technology-driven work packages (WPs 2-6). This platform will create communication channels, facilitate collaboration and knowledge sharing across work packages and stakeholder groups, actively disseminating project outcomes and enabling the pathways to impact. This will be delivered as a series of workshops; both cross-cutting (looking at the broader issues associated with detection and its successful deployment) and more focused (looking at specific issues associated with a particular technology and the contexts for its use). In addition to interacting with stakeholders (e.g. policy-makers, inspectors, NGOs, industry), this approach will use the breadth of expertise established within the consortium and assembled from across a wide-range of disciplines. This brings together 'technology-owners' (natural and physical scientists) with 'technology-evaluators' (mathematical and social sciences) to ensure that the best technological approaches are married with suitable sampling and risk-based deployment strategies, that they have stakeholder acceptability and offer genuine cost-efficiency benefits to public and private stakeholders alike.

In addition to the novel approach built into the project design, the effective delivery of impact will also benefit from a consortium which has an extremely strong track record of delivering translation science, to policy and industry alike. As government science agencies, the major remit for both Fera and Forest Research is to take science and technology and to translate it into policy-focused tools and evidence. This is a role they provide routinely for Defra and Forestry Commission, and their associated inspectors on the frontline in the field (e.g. Fera PHSI and FC Inspectors). In terms of delivery of technologies to end-users including industry, there is also a strong track record across the consortium in a whole range of contexts e.g. Worcester (horticulture industry diagnostics), JHI (potato industry diagnostics), Greenwich (pest trap deployment) and Fera (field diagnostics deployment). The integration of a number of SMEs within the consortium is another pathway to impact; providing a route for new technologies to be made freely available beyond the end of the project. Finally as plant and tree health sits within a European regulatory framework, the ability to engage with international partners and stakeholders is important. The consortium has a wealth of experience and contacts in this area, in particular through its central role in a range of related EU-funded projects e.g. Q-Detect (Fera-led), ISEFOR (Aberdeen-led) and PERMIT (FR-led). It will also build upon existing systems for knowledge exchange within our region, especially through the use of the European Plant Protection Organization (EPPO). By working with EPPO, using activities such as its workshops and conferences, we will be able to reach out to tree health practitioners across Europe; in many cases the real frontline for UK biosecurity.

Publications

10 25 50
 
Description Our experimental strategy is based on the detection of volatile organic compounds (VOC) produced by pathogens and infected plants and/or soil, as a chemical fingerprint for detection of infection. Modern techniques, including mass spectrometry associated with gas chromatography and ion mobility spectroscopy (IMS), are able to detect VOC at low concentrations (i.e. ppm or less) and could be parameterized for the specific detection of VOC signatures produced by pathogens. In this regard, we have examined the VOC produced during culture under various experimental conditions of different plant pathogenic bacterial and fungal models including Ceratocystis platani (plane canker), several Phytophthora spp. and Pseudomonas syringae pv. aesculi (chestnut bleeding canker).
The chemical profiles of the VOC are examined through headspace sampling and adsorption onto solid phase micro-extraction fibres (SPME). Additionally, we have used different culture/extraction techniques for comparison and reproducibility control. This phase of the study has enabled us: i) to determine if VOC are detectable and can constitute a chemical signature for detection of the pathogen/infection, ii) to construct a library of VOC signatures for a range of pests and pathogens. Metabolomic studies have enabled us to observe a clear distinction was apparent between VOC signatures from different species.
Exploitation Route Our experiments have identified characteristic features of VOC profiles produced by a range of plant pathogenic organisms, indicating that VOC profiles can be used to detect and discriminate between different pathogens as part of an integrated strategy for disease detection and control.
Sectors Agriculture, Food and Drink,Environment,Other

 
Description APHA Visit (Heathrow Airport) 
Form Of Engagement Activity A formal working group, expert panel or dialogue
Part Of Official Scheme? No
Geographic Reach Regional
Primary Audience Professional Practitioners
Results and Impact Visit to APHA and Heathrow Airport to review plant import controls and discuss feasibility of applying volatile detection methods as a tool in pest and pathogen detection.
Year(s) Of Engagement Activity 2015
 
Description APHA visit (Southampton Docks) 
Form Of Engagement Activity A formal working group, expert panel or dialogue
Part Of Official Scheme? No
Geographic Reach Regional
Primary Audience Professional Practitioners
Results and Impact Visit to Southampton Docks to review plant import controls with Plant Health officers and discuss feasibility of applying volatile detection methods for pathogen detection.
Year(s) Of Engagement Activity 2015
 
Description Grand Challenges in Plant Pathology Study Group 
Form Of Engagement Activity Participation in an activity, workshop or similar
Part Of Official Scheme? No
Geographic Reach International
Primary Audience Postgraduate students
Results and Impact I was the lead organiser for the first Grand Challenges in Plant Pathology Study Group, held at the University of Oxford. The meeting was attended by 30 early career delegates from the UK and 2 delegates from the US, who were supported by the American Phytopathological Society (APS). The study group was sponsored by the British Society for Plant Pathology (BSPP), BASF, CABI and Syngenta, with delegate attendance supported by several BBSRC DTPs, BSPP, APS and academic institutions. Organisations represented at the study group, who supported presenter and facilitator
attendance and provided in-kind contributions of facilitator time, included Syngenta, Fera, APHA, CABI, BASF, Bayer, Velcourt, Oxitec, Oxford Nanopore, Equi-grass, Phytoengineering, The Royal Botanic Gardens Kew and USDA-APHIS. Academic facilitators attended from the University of
Oxford, University of Warwick, University of Cambridge, University of Salford and the University of Exeter. Academic facilitators and presenters provided expertise across a wide range of disciplines, including interdisciplinary perspectives from the social sciences (digital education, anthropology) and physical sciences (material science, mathematical and statistical modelling).
Study groups provide an opportunity for active learning through team-based, problem-focused research and discussion. During the study group delegates discussed solutions to five challenges relating to plant pathology, which were posed by non-academic organisations and selected by the
organising committee to provide a diverse set of problems that would focus delegates' attention and on the needs of a wide range of different stakeholders, including UK farmers, smallholder farmers in developing countries, plant health inspectors, policymakers, extension services, agribusiness and academic and industrial researchers. Among the challenges discussed the study group specifically addressed the challenges associated with the development and application of new technologies for disease detection, and included a presentation on the application of volatile detection methods in the detection of plant disease.
Year(s) Of Engagement Activity 2016
URL http://www.bspp.org.uk/grandchallenges/conference2016.php
 
Description Plant Science Masterclass for Schools 
Form Of Engagement Activity A talk or presentation
Part Of Official Scheme? No
Geographic Reach Local
Primary Audience Schools
Results and Impact Workshop for sixth form students on plant disease research.
Year(s) Of Engagement Activity 2017
 
Description School Visit (Didcot Girls School) 
Form Of Engagement Activity A talk or presentation
Part Of Official Scheme? No
Geographic Reach Local
Primary Audience Schools
Results and Impact Visit to Didcot Girls School to provide a talk on plant disease research and assist students with science club activities
Year(s) Of Engagement Activity 2016
 
Description UNIQ summer school 
Form Of Engagement Activity A talk or presentation
Part Of Official Scheme? Yes
Geographic Reach National
Primary Audience Schools
Results and Impact The talk stimulated discussion and interests among the students, who had not previously been introduced to the science of plant disease.

The event resulted in an increase in students applying from the programme to study bioscience at University level, and specifically at the University of Oxford, with 75% of students applying for entry in 2014.
Year(s) Of Engagement Activity 2013,2014,2015,2016,2017,2018
URL http://www.uniq.ox.ac.uk/courses/mpls/biology