Variability in salt tolerance in seedlings of panicum coloratum var. makarikariense l. in hydroponics

• Autores: Cardamone, Luisina; Cuatrín, Alejandra; Grunberg, Karina; Tomás, María Andrea
• Año de publicación: 2015
• Idioma: inglés
• Tipo de recurso: documento de conferencia
• Materia: Salt tolerance; Panicum coloratum; Hidroponics
• Institución: Universidad Nacional de Córdoba

Fil: Cardamone, Luisina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina.
Fil: Cuatrín, Alejandra. Instituto Nacional de Tecnología Agropecuaria; Argentina.
Fil: Grunberg, Karina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina.
Fil: Tomás, María Andrea. Instituto Nacional de Tecnología Agropecuaria; Argentina.
Fil: Cardamone, Luisina. Instituto Nacional de Tecnología Agropecuaria; Argentina.
Fil: Grunberg, Karina. Instituto Nacional de Tecnología Agropecuaria; Argentina.
Soil salinity is a major constraint to plant production and an increasing phenomenon in regions with raising water tables. Improving germplasm for salinity tolerance could be a more sustainable solution than soil reclamation in subtropical areas. Panicum coloratum var. makarikariense is a warm-season perennial grass native to Africa used as forage in subtropical areas of the world. Genetic improvement to increase salinity tolerance in the species could make it a forage resource for areas with this edaphic restriction. In this study we searched for variability in salinity tolerance in a collection of P. coloratum var. makarikariense to find suitable materials to be included in a breeding program. A screening of 18 families from 4 populations (ER, DF, TS and UCB) was performed by culturing in hydroponic conditions, in a DBCA (2 replicates, ten seedlings/replicate of each family) in a greenhouse setting. Treatments were: control (Hoagland solution, 0mM NaCl) and salinity (Hoagland solution + 200 mM NaCl). Plants were cultivated for 35 days then divided into roots and aerial biomass at harvest. Tolerance was evaluated as total biomass (TB) produced under salinity and by calculating the damage as the percent reduction in growth in salt compared to the control setting. Data was analyzed by ANOVA. PCA and clustering analysis were also used to discriminate susceptible from tolerant families. Families ER3, ER6, ER9 and DF7 had the highest TB although differences were not significant. Nonetheless, clustering and PCA grouped the same families as more productive. Damage was estimated in: aerial fresh weight, root fresh weight, total fresh weight, aerial dry weight, root dry weight, total dry weight. Families ER3, ER6, ER10, TS23 and DF7 had the lowest damage in all of variables. PCA biplot and clustering based on damage distinguished; ER3, ER6, ER10, TS23 and DF7 as tolerant families while the rest were set as susceptible ones. Variability for salinity tolerance was found in the collection and promising materials were detected to enter a breeding program to increase productivity under salt conditions.
https://www.agro.uba.ar/ISFB2015
Fil: Cardamone, Luisina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina.
Fil: Cuatrín, Alejandra. Instituto Nacional de Tecnología Agropecuaria; Argentina.
Fil: Grunberg, Karina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina.
Fil: Tomás, María Andrea. Instituto Nacional de Tecnología Agropecuaria; Argentina.
Fil: Cardamone, Luisina. Instituto Nacional de Tecnología Agropecuaria; Argentina.
Fil: Grunberg, Karina. Instituto Nacional de Tecnología Agropecuaria; Argentina.
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