Resilience to salinity in tomato



Agriculture will have to feed an increasing world population, using a decreasing arable land surface. This is all the more challenging, since the quality of some of our best soils is under threat. Salinity is an increasing problem, in particular in coastal or irrigated areas. These traditionally fertile areas suffer from increases in soil salinity, reaching concentrations higher than tolerated by current cultivation practices. In the near future these areas will no longer be suitable for cultivating food unless we adopt novel production practices, including the use of novel resilient plant varieties and/or treating plants with natural agents that make them more resilient.

For plants to be resilient to abiotic stresses like salinity and drought, the root system is of vital importance. Roots are the primary organs that adapt their architecture and physiology to drought and salt stress. Their performance is key to the ability of the whole plant to recruit nutrients and water. However, we have limited knowledge of how the root functions and this translates into a limited capability to control plant resilience to abiotic stress.

In recent years, there were initial discoveries about the role and importance of root architecture, stress QTLs and the interaction of plant roots with mycorrhiza. Novel developments in biostimulants show that it is possible to affect root functioning and resilience towards abiotic stress such as high-salinity. However, despite the potential for agriculture, there is very limited knowledge on the mechanisms through which biostimulants act.


The ROOT project

The goal of ROOT is firstly to provide fundamental knowledge on how to improve the resilience of crop root systems towards salinity stress. We focus on tomato because it is an important field crop in European areas threatened by salinization, and it has many well-organized resources (well-annotated genome, genetic resources).

Key aspects to be addressed by ROOT:

  • Control tomato root architecture by identifying key regulating genes in tomato.
  • Identify QTLs and markers that are predictive for adaptive root architectures and resilience to salt stress in tomato.
  • Understand the mechanism by which biostimulants contribute to tomato resilience under salinity stress conditions, and understand their mode of action.

Secondly, ROOT will provide practical knowledge on strategies for reinforcing tomato resilience towards abiotic stress, and go from the lab to the field. ROOT will contribute to developing future cultivation systems for tomato in areas threatened by salinization. The biostimulants that we work with in ROOT will contribute to tomato resilience in the short term, and will create novel opportunities for farmers to operate in areas which are under threat of salinity. The QTLs and markers for root adaptability to salt stress discovered in ROOT will contribute to more resilient tomato varieties in the longer term.

ROOT unites the complementary know-how and expertise of European research groups from four different countries to develop strategies for resilient and salt-tolerant root systems in tomato. The industrial partners in ROOT not only advises the research project from their market-oriented viewpoint, but also actively participates in work packages, will perform a field experiment, provide their network for stakeholder involvement and will take the lead in the transfer of knowledge into application.



Prof. Christa Testerink
Wageningen University, Laboratory of Plant Physiology, NETHERLANDS

Assistant Prof. Rumyana Karlova
Wageningen University, Laboratory of Plant Physiology, NETHERLANDS



Prof. Cinzia Bertea
Università degli Studi di Torino, Department of Life Sciences and Systems Biology, ITALY

Prof. Björn Usadel
USADELLAB member working on the ROOT project:
Dr. Andrea Schrader

Dr. Rebecca Stevens
INRAe, l’institut national de recherche pour l’agriculture, l’alimentation et l’environnement, Research Unit GAFL : Genetics and Breeding of Fruit and Vegetables, FRANCE

Dr. Valeria Contartese
Green HAS Italia SpA, ITALY

Dr. Shai Koussevitzky
Limagrain, Hazera


This project receives funding from the European Union's Horizon 2020 research and innovation programme under grant agreement No 771134. The project ROOT is carried out under the ERA-NET Cofund SusCrop (Grant N°771134), being part of the Joint Programming Initiative on Agriculture, Food Security and Climate Change (FACCE-JPI).