We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Integrative Control Between Proton Pumps and SOS1 Antiporters in Roots is Crucial for Maintaining Low Na+ Accumulation and Salt Tolerance in Ammonium-Supplied Sorghum bicolor.
- Authors
de Souza Miranda, Rafael; Mesquita, Rosilene Oliveira; Costa, José Hélio; Alvarez-Pizarro, Juan Carlos; Prisco, José Tarquinio; Gomes-Filho, Enéas
- Abstract
An effective strategy for re-establishing K+ and Na+ homeostasis is a challenge for the improvement of plant performance in saline soil. Specifically, attempts to understand the mechanisms of Na+ extrusion from plant cells, the control of Na+ loading in the xylem and the partitioning of the accumulated Na+ between different plant organs are ongoing. Our goal was to provide insight into how an external nitrogen source affects Na+ accumulation in Sorghum bicolor under saline conditions. The NH4+ supply improved the salt tolerance of the plant by restricting Na+ accumulation and improving the K+/Na+ homeostasis in shoots, which was consistent with the high activity and expression of Na+/H+ antiporters and proton pumps in the plasma membrane and vacuoles in the roots, resulting in low Na+ loading in the xylem. Conversely, although NO3--grown plants had exclusion and sequestration mechanisms for Na+, these responses were not sufficient to reduce Na+ accumulation. In conclusion, NH4+ acts as an efficient signal to activate co-ordinately responses involved in the regulation of Na+ homeostasis in sorghum plants under salt stress, which leads to salt tolerance.
- Subjects
PROTON pumps (Biology); SORGHUM; PLANT performance; SOIL salinity; SODIUM/POTASSIUM ATPase
- Publication
Plant & Cell Physiology, 2017, Vol 58, Issue 3, p522
- ISSN
0032-0781
- Publication type
Article
- DOI
10.1093/pcp/pcw231