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Root-targeted biotechnology to mediate hormonal signalling and improve crop stress tolerance

Edmond Ghanem, Michel and Hichri, Imene and Smigocki, Ann C. and Albacete, Alfonso and Fauconnier, Marie-Laure and Diatloff, Eugene and Martinez-Andujar, Cristina and Lutts, Stanley and Dodd, Ian C. and Perez-Alfocea, Francisco (2011) Root-targeted biotechnology to mediate hormonal signalling and improve crop stress tolerance. Plant Cell Reports, 30 (5). pp. 807-823. ISSN 0721-7714

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Abstract

Since plant root systems capture both water and nutrients essential for the formation of crop yield, there has been renewed biotechnological focus on root system improvement. Although water and nutrient uptake can be facilitated by membrane proteins known as aquaporins and nutrient transporters, respectively, there is a little evidence that root-localised overexpression of these proteins improves plant growth or stress tolerance. Recent work suggests that the major classes of phytohormones are involved not only in regulating aquaporin and nutrient transporter expression and activity, but also in sculpting root system architecture. Root-specific expression of plant and bacterial phytohormone-related genes, using either root-specific or root-inducible promoters or grafting non-transformed plants onto constitutive hormone producing rootstocks, has examined the role of root hormone production in mediating crop stress tolerance. Root-specific traits such as root system architecture, sensing of edaphic stress and root-to-shoot communication can be exploited to improve resource (water and nutrients) capture and plant development under resource-limited conditions. Thus, root system engineering provides new opportunities to maintain sustainable crop production under changing environmental conditions.

Item Type: Article
Journal or Publication Title: Plant Cell Reports
Uncontrolled Keywords: Abiotic stress ; Root-to-shoot signalling ; ABA ; Cytokinins ; ACC ; Grafting ; IPT ; Plant growth promoting rhizobacterium ; SOLANUM-LYCOPERSICON L. ; CYTOKININ BIOSYNTHESIS GENE ; TRANSGENIC TOBACCO PLANTS ; LEAF ABA CONCENTRATION ; WATER-USE EFFICIENCY ; ABSCISIC-ACID ; HYDRAULIC CONDUCTIVITY ; ARABIDOPSIS-THALIANA ; SYSTEM ARCHITECTURE ; SALINIZED TOMATO
Subjects:
Departments: Faculty of Science and Technology > Lancaster Environment Centre
ID Code: 53086
Deposited By: ep_importer_pure
Deposited On: 09 Mar 2012 02:48
Refereed?: Yes
Published?: Published
Last Modified: 06 Sep 2013 22:47
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/53086

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