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Rootstocks to improve root function and resource-use efficiency

Code: 9781801460064
Francisco Pérez-Alfocea, CEBAS-CSIC, Spain; Stephen Yeboah, CSIR-Crops Research Institute, Ghana; and Ian C. Dodd, Lancaster Environment Centre, UK

Chapter synopsis: Grafting, a surgical technique to attach genetically different shoots and roots (scions and rootstocks) allows “designer root systems” to enhance agricultural productivity and sustainability. Rootstocks improve plant nutrient relations by increasing nutrient capture and/or nutrient use efficiency, by multiple mechanisms including altered root morphology. Moreover, rootstocks can enhance water uptake and/or diminish water loss according to changes in root form and function, and root-to-shoot phytohormonal signalling. While the role of root-to-shoot ABA signalling in effecting stomatal closure is equivocal, root-sourced cytokinins and ACC regulate shoot senescence and vegetative growth respectively. Rootstock-mediated crop improvement offers opportunities to enhance crop resource use efficiency, especially in the developing world.

DOI: 10.19103/AS.2020.0075.25
Table of contents 1 Introduction 2 Nutrient relations 3 Water relations 4 Phytohormones 5 Case study: Tomato rootstocks as a viable strategy to overcome abiotic stresses in Ghana 6 Conclusion 7 Future trends 8 Where to look for further information 9 Acknowledgements 10 References

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