A single nucleotide substitution in TaHKT1;5‐D controls shoot Na+ accumulation in bread wheat

• DOI: 10.1111/pce.13841
• Publication Date: 2020-07-11T19:36:55Z
• Authors: Chana Borjigin; Rhiannon K. Schil...; Jayakumar Bose; Maria Hrmova; Jiaen Qiu; Stefanie Wege; Apriadi Situmorang; Caitlin Byrt; Chris Brien; Bettina Berger; Matthew Gilliham; Allison S. Pearson; Stuart J. Roy
• Keywords: 2. Zero hunger; Models, Molecular; 0301 basic medicine; Sodium; Original Articles; Salt Tolerance; Polymorphism, Single Nucleotide; Plant Leaves; Potassium-Hydrogen Antiporters; Xenopus laevis; 03 medical and health sciences; Gene Expression Regulation, Plant; Xylem; XXXXXX - Unknown; Oocytes; Animals; Female; Plant Shoots; Triticum; Plant Proteins

Abstract Improving salinity tolerance in the most widely cultivated cereal, bread wheat ( Triticum aestivum L.), is essential to increase grain yields on saline agricultural lands. A Portuguese landrace, Mocho de Espiga Branca accumulates up sixfold greater leaf and sheath sodium (Na + ) than two Australian cultivars, Gladius Scout, under salt stress hydroponics. Despite high Na concentrations, maintained similar compared Scout. naturally occurring single nucleotide substitution was identified gene encoding a major transporter TaHKT1;5‐D Branca, which resulted L190P amino acid residue variation. This variant prevents from retrieving root xylem leading shoot concentration. The identification of tissue‐tolerant will accelerate development more elite salt‐tolerant cultivars.