Publication Date: 2012.
Asexual, vertically transmitted fungal endophytes of the genus Neotyphodium are considered to enhance growth, stress resistance and competitiveness of agronomic grasses, but have been suggested to have neutral or deleterious effects on wild grasses. We studied whether the associations between Bromus auleticus and their endophytes, Neotyphodium pampeanum and Neotyphodium tembladerae, are beneficial for this wild forage grass native to South America. In a greenhouse experiment, 3‐month‐old endophyte‐infected plants (E+) showed enhanced growth relative to their endophyte‐free counterparts (E−). In a one‐year‐long experiment in the field, E+ plants showed higher survival and regrowth rate, and produced more biomass and seeds than E− plants. Only with respect to the seed output did N. tembladerae seem to be detrimental, whereas N. pampeanum did not affect this parameter. No differences were observed with respect to the germination of seeds produced by E+ or E− plants. Loline alkaloids were detected in N. pampeanum‐infected plants. Our results show that, similar to results with agronomic grasses, in wild grasses, the symbiosis with Neotyphodium species could be mutualistic.
EEA Concepción del Uruguay
Author affiliation: Iannone, Leopoldo Javier. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Micología y Botánica. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Micología y Botánica; Argentina
Author affiliation: Pinget, Albertina Daniela. Universidad de Concepción del Uruguay. Facultad de Ciencias Agrarias; Argentina
Author affiliation: Nagabhyru, P. University of Kentucky. Department of Plant Pathology; Estados Unidos
Author affiliation: Schardl, Christopher L. University of Kentucky. Department of Plant Pathology; Estados Unidos
Author affiliation: De Battista, Jose Pedro. INTA. Estación Experimental Agropecuaria Concepción del Uruguay; Argentina
Repository: INTA Digital (INTA). Instituto Nacional de Tecnología Agropecuaria