Publication Date: 2019.
Prosopis alba Griseb. (algarrobo blanco) is an important tree legume in semiarid regions of South America. Under field conditions, their seedlings are subjected to a wide range of environmental conditions that might produce stress, reducing their survival and/or growth. The aim of this work was to evaluate the combined effect of two native arbuscular mycorrhizal fungi (AMF) inocula and fertilization on growth variables of P. alba seedlings under nursery conditions and after drought stress. P. alba seedlings received different levels of basic fertilization (0%, 25% and 100%) and were inoculated with native AMF isolated from different rainfall regions of Parque Chaqueño Argentino: Colonia Benítez (CB, 1300 mm rainfall) and Padre Lozano (PL, 650 mm rainfall) or a mixture of both inocula (MIX), while the control group remained uninoculated. The combined application of native AMF and fertilization did not affect mycorrhizal colonization but allowed the formation of the different AMF structures. Moreover, when comparing the PL inoculum from a low rainfall region with other treatments, it significantly increased growth and development under nursery conditions and drought stress tolerance in the greenhouse. Therefore, AMF benefits for P. alba were related to inoculum source, being improved by the application of low fertilizer rates. This work supports the development of sustainable P. alba seedlings production and their field establishment under symbiotic conditions with native AMF.
Author affiliation: Salto, Carla Susana. INTA. Estación Experimental Agropecuaria Concordia; Argentina
Author affiliation: Sagadin, Monica Beatriz. INTA. Instituto de Fisiología y Recursos Genéticos Vegetales; Argentina
Author affiliation: Luna, Celina Mercedes. INTA. Instituto de Fisiología y Recursos Genéticos Vegetales; Argentina. Consejo de Nacional Investigaciones Científicas y Técnicas; Argentina
Author affiliation: Oberschelp, Gustavo Pedro Javier. INTA. Estación Experimental Agropecuaria Concordia; Argentina
Author affiliation: Harrand, Leonel. INTA. Estación Experimental Agropecuaria Concordia; Argentina
Author affiliation: Cabello, Marta Noemí. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Instituto de Botánica Spegazzini; Argentina. Comisión de Investigaciones Científicas de la Provincia de Buenos Aires; Argentina
Repository: INTA Digital (INTA). Instituto Nacional de Tecnología Agropecuaria