Physiological and molecular mechanisms mediating xylem Na+ loading in barley in the context of salinity stress tolerance

• Published in: Plant, cell and environment Vol. 40; no. 7; pp. 1009 - 1020
• Main Authors: Zhu, Min, Zhou, Meixue, Shabala, Lana, Shabala, Sergey
• Format: Journal Article
• Language: English
• Published: United States Wiley Subscription Services, Inc 01.07.2017
• Subjects: ABA; Abscisic acid; Abscisic Acid - metabolism; Abscisic Acid - pharmacology; Barley; Bumetanide; Calcium; Calcium influx; cations; CCC transporter; Chlorides; Fluxes; Gene Expression Regulation, Plant; genes; genotype; Genotypes; H2O2; Hordeum - drug effects; Hordeum - genetics; Hordeum - physiology; Hydrogen peroxide; Hydrogen Peroxide - pharmacology; Molecular modelling; NAD(P)H oxidase; NADP (coenzyme); NADPH oxidase; Oxidase; Parenchyma; parenchyma (plant tissue); Plant Proteins - genetics; Plant Proteins - metabolism; potassium; Potassium - metabolism; Reactive oxygen species; Salinity; Salinity effects; Salinity tolerance; salt stress; salt tolerance; Signaling; SKOR; sodium; Sodium - metabolism; SOS1; stele; stress tolerance; Stress, Physiological - physiology; Stresses; Thiourea - pharmacology; Transcription; transporters; Xylem; Xylem - drug effects; Xylem - metabolism; xylem sodium loading; ABA; CCC transporter; NADPH oxidase; xylem sodium loading; H2O2; SOS1; SKOR

Time‐dependent kinetics of xylem Na+ loading was investigated using a large number of barley genotypes contrasting in their salinity tolerance. Salt‐sensitive varieties were less efficient in controlling xylem Na+ loading and showed a gradual increase in the xylem Na+ content over the time. To under...