Developing a novel platform to determine the epidermal layer transcriptome in plants based on RNA-seq allele-specific expression

Lead Research Organisation: East Malling Research (United Kingdom)
Department Name: Science

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.

Planned Impact

Who will benefit? Those who will benefit from this research are academics working on processes occurring in the epidermis, especially those researching tomato. Bioinformaticians will benefit from our methodology to analyze and visualise RNA-seq data. Through novel discoveries made in our platform industrial contacts will benefit through licensing patents and developing new processes and tomato varieties. Ultimately, as tomato is a key crop that is central to human nutrition and the global diet, this research will benefit the public at large. How will they benefit? Although our research is fundamental it will have many avenues of impact especially as it is designed to be a platform for further experimentation and exploitation. Key to this is the use of tomato that is a model system for fleshy fruit production and also an important crop in its own right. In 2008 tomato production was ~130 million tonnes that had a value of ~$50 billion USD, (FAOSTAT). It is also nutritionally very important providing key sources of anti-oxidants such as lycopene, flavanols and vitamin C. The PI is always keen to maximise the impact of his research and has continued working on tomato because its importance as a food crop. In order to maximise the impact of the research we will place all data in the public domain in a timely manner. We will follow the exemplary lead of our project in sequencing the tomato genome, whereby all sequence data has been placed in the public domain for all to use, almost as soon as it has come off the sequencing machines. We will continue to work on this principle in order to ensure the highest impact of our research. Such communication to the research community is essential and Dr Bishop has been instrumental in setting up the annual UK-SOL meetings (http://www.uk-sol.org/index.htm) in which progress of the tomato genome sequencing programme has been reported along with talks on recent research from leaders in UK and worldwide labs. Representatives from UK industry have also given talks and/or participated in these meetings. He was also one of the leading researchers organising the annual international SOL meeting of ~280 participants. We have requested funds to go to the 2012 SOL meeting and will provide a workshop demonstrating the web-based resources that we have generated. This will ensure rapid dissemination and exploitation of our data. To ensure rapid use of our novel data we have already discussed the underlying idea in confidence with Imperial Innovations, the College's technology transfer company, and also with Syngenta. Initiating such avenues of intellectual property transfer at the early stages of research will enable efficient and timely exploitation of the research outputs when required. It is also evident that although our research is fundamental it will have many potential avenues for benefiting the tomato and related crops. Groups likely to benefit include plant breeders, plant biotechnology companies, agrochemical companies and bioenergy industries. Communicating our project to the public is also critically important to us and we have been involved in generating press releases for the initial phase of the sequencing project that have been used by the national press (The Guardian) the Grower and BBSRC Business. The PI has been trained by the BBSRC in effective communication with the press and will be willing to highlight the key impacts that this research will have especially in the areas that plant breeding companies are striving to improve. This includes the development of stress-tolerant and pathogen/insect-resistant varieties of horticultural crops that will be vital in providing an expanding population with fresh produce but using less input. Also our insights into the genes that encode the fruit epidermal layer will provide important leads to make tomatoes tastier. Similarly all research is communicated to the academic research community via research articles in peer-reviewed journals.

Publications

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Filippis I (2013) Using a periclinal chimera to unravel layer-specific gene expression in plants. in The Plant journal : for cell and molecular biology

 
Description Ever since Hooke's seminal observations that organisms are made from cells a fundamental question has existed as to what defines the components that make each cell unique. Plants are made from numerous different cell types that have different shapes, sizes and function. Each unique cell type has its own complement of components to perform its specialised function. Being able to define the components that make each cell unique is of fundamental importance for gaining a better understanding of all processes occurring in plants from vegetative growth to flowering, and from resistance to insect and pathogen attack to plant mineral nutrition.
Dicotyledonous plants normally have three distinct layers of cells, L1, L2 and L3. Layer L1 is the single layer of cells making up the epidermis, layer L2 the single cell sub-epidermal layer and layer L3 constitutes the rest of the internal cells. Our research has shown how it is possible to harvest a whole plant organ and characterise the level of layer-specific expression. This was possible by using a periclinal chimera that has its L1 layer from Solanum pennellii and its L2 and L3 layers from Solanum lycopersicum. Layer specific expression was measured by detecting the level of the frequency of species-specific transcripts. RNA-seq analysis enabled the genome-wide assessment of whether a gene is expressed in the L1 or L2/L3 layers. From 13277 genes that are expressed in both the chimera and the parental lines and with at least one polymorphism between the parental alleles, we identified 382 genes that are preferentially expressed in L1 in contrast to 1159 genes in L2/L3. Gene ontology analysis shows that many genes preferentially expressed in L1 are involved in cutin and wax biosynthesis, whereas numerous genes that are preferentially expressed in L2/L3 tissue are associated with chloroplastic processes. These data indicate the use of such chimeras and provide detailed information on the level of layer-specific expression of genes.
Exploitation Route Solanum pennellii is a wild tomato species endemic to Andean regions in South America, where it has evolved to thrive in arid habitats. Because of its extreme stress tolerance and unusual morphology, it is an important donor of germplasm for the cultivated tomato Solanum lycopersicum.
Our research helps in the identification of genes that are involved in generating the diversity of cuticles that are present in the tomato wild species. This includes the greater abundance of waxes, primarily very-long-chain alkanes, in S. pennellii that has been suggested to increase resistance to water flux across the cuticle.
See, The genome of the stress-tolerant wild tomato species Solanum pennellii, Nature Genetics, 46, 9, (1034), (2014).
Ultimately this will lead to the generation of more stress resilient plants.
Sectors Agriculture, Food and Drink

URL http://onlinelibrary.wiley.com/doi/10.1111/tpj.12250/abstract;jsessionid=746F02DFB65F077C34F917730FE890D8.f03t02
 
Description Introduction of myself to CUPGRA 
Form Of Engagement Activity A talk or presentation
Part Of Official Scheme? No
Geographic Reach National
Primary Audience Industry/Business
Results and Impact Brief introductory talk about my past experience and future role in NIAB CUF to potato growers, breeders and agronomists. Informative discussions with CUPGRA members during the meeting.
Year(s) Of Engagement Activity 2018
 
Description Part of Research talk given at University of Nottingham (Sutton Bonnington Campus) 
Form Of Engagement Activity A talk or presentation
Part Of Official Scheme? No
Geographic Reach Local
Primary Audience Professional Practitioners
Results and Impact Provided a research talk on the outcome of theresearch
Year(s) Of Engagement Activity 2017
 
Description Presentation to Tomato Growers Association (TGA) Technical Committee 
Form Of Engagement Activity A formal working group, expert panel or dialogue
Part Of Official Scheme? No
Geographic Reach National
Primary Audience Professional Practitioners
Results and Impact Talk and engagement with the TGA Technical Committee, describing research being performed at NIAB EMR.
Year(s) Of Engagement Activity 2017
 
Description Talk to MSc students (University of Greenwich) 
Form Of Engagement Activity A talk or presentation
Part Of Official Scheme? No
Geographic Reach Local
Primary Audience Postgraduate students
Results and Impact Provided a Lecture to MSc students at the University of Greenwich.

This research talk provided some debate and good feedback post lecture from the students.
Year(s) Of Engagement Activity 2016
 
Description Talk to MSc students 2017 
Form Of Engagement Activity A talk or presentation
Part Of Official Scheme? No
Geographic Reach Local
Primary Audience Postgraduate students
Results and Impact University of Greenwich students visited NIAB EMR and a presentation was provided.
Year(s) Of Engagement Activity 2017
 
Description University of Nottingham visit & MSc Talks 
Form Of Engagement Activity A talk or presentation
Part Of Official Scheme? No
Geographic Reach International
Primary Audience Postgraduate students
Results and Impact Provision of talks to University of Nottingham MSc students.
Year(s) Of Engagement Activity 2018
 
Description Visit to APS group Europa Nursery 
Form Of Engagement Activity A formal working group, expert panel or dialogue
Part Of Official Scheme? No
Geographic Reach National
Primary Audience Industry/Business
Results and Impact Visit to APS Nursery in Ash Kent, to discus tomato growing and opportunities to interact.
Year(s) Of Engagement Activity 2017