Hormonal regulation of source - sink relations to maintain crop productivity under salinity: a case study of root-to-shoot signalling in tomato

• DOI: 10.1071/fp10012
• Publication Date: 2010-07-02T01:58:17Z
• Authors: Francisco Pérez-A...; Alfonso Albacete; Michel E. Ghanem; Ian C. Dodd
• Keywords: Sink (geography)

Salinity decreases crop yield first by reducing growth of assimilate-consuming sink organs and, second, decreasing assimilate production in photosynthetically active source tissues. Although much work has focussed on controlling the accumulation toxic ions (mainly Na+ and Cl–), search for primary limiting factor(s) continues. The root, sensing environmental constraints soil, may influence root-to-shoot signalling to control shoot physiology, ultimately agricultural productivity. Hormonal signals, such as cytokinins, ABA, ethylene precursor 1-aminocyclopropane-1-carboxylic acid auxin indole-3-acetic coordinate usage competing sinks (biomass partitioning). regulation source–sink relations during osmotic phase salinity (independent specific ions) affects whole-plant energy availability prolong maintenance growth, root function ion homeostasis, could be critical delay or any other levels. This viewpoint emphasises that simultaneously maintaining delaying early leaf senescence is necessary increase salt-affected soils.