Germination response of buckwheat grown in northern Patagonia to different salt stress conditions.

• Autores: Keil, Aldana Janet; Boeri, Patricia Alejandra; Gallego, Juan Jose; Quichán, Sergio Eduardo; Zubillaga, Maria Fany
• Año de publicación: 2021
• Idioma: español castellano
• Tipo de recurso: documento de conferencia
• Materia: Ciencias Agrarias; Buckwheat; Trigo Sarraceno; Salt Stress; Germination; Growth; Ciencias Agrarias
• Institución: Universidad Nacional de Río Negro

Fil: Zubillaga, María Fany. Universidad Nacional de Rio Negro. CIT Rio Negro. Río Negro, Argentina.
Fil: Keil, Aldana Janet. Universidad Nacional de Río Negro, Río Negro, Argentina.
Fil: Quichán, Sergio Eduardo. Universidad Nacional de Río Negro. Río Negro, Argentina.
Fil: Gallego, Juan José. INTA Valle Inferior. Río Negro, Argentina.
Fil: Boeri, Patricia. Universidad Nacional de Río Negro. Río Negro, Argentina.
Buckwheat is a recently introduced crop in the lower valley of Rio Negro. This site is characterised by a great variability of soils and sites with salinity. Germination has been considered the most sensitive stage to salinity in the life of a plant. A saline environment causes a delay in germination, affects plant growth and reduces grain and biomass production. The objective of this work was to determine the germination response of locally produced buckwheat to different sodium chloride (NaCl) salt solutions: 1) Control: H2O, 2) 0.05M NaCl, 3) 0.1M NaCl, 4) 0.15M NaCl, 5) 0.2M NaCl, 6) 0.25M NaCl and 7) 0.3M NaCl. Each treatment was represented by five Petri dishes with 20 seeds each. They were incubated in the germination chamber at 25°C. Total radicle length (TRL), germination capacity (GC); germination energy (GE); mean germination time (MGT) were quantified, The GC was 100% for the control and 0.05M, then gradually reduced to a minimum of 20% at 0.30M. EG decreased with salt concentration, although there was no difference (99%) between the control, 0.05M and 0.10M treatments. For 0.30M EG reached 50%. TMG tended to increase with salt concentration, doubling the time of the control at the highest concentration (3.6 days). LTR decreased with salt concentration, the 0.30M treatment decreased more than 95% compared to the control. Increasing NaCl concentration reduced CG, EG and LTR and increased TMG. However, buckwheat has shown tolerance to salinity up to concentrations of 0.25M with germination rates of 80%.