Interaction microenvironment - Pantoea agglomerans limits maize yield

  • Daniel Ruíz Juárez
  • Alejandro Azaola Espinosa Universidad Autónoma Metropolitana Calz del Hueso 1100, Coyoacán 04960, Tlalpan, CDMX Edificio N laboratorio 104
  • Gilberto Esquivel Esquivel
  • Eva Segundo Pedraza
  • Hilda Victoria Silva Rojas
Keywords: chlorotic streaks, Pantoea agglomerans, maize disease, microclimate

Abstract

Pantoea agglomerans has been reported as the cause of chlorotic streaks on maize leaves in the Central High Valleys of México (CVHM), but there are no current data of how the infection of this new pathogen in Mexico affects production and yield of the crop. To understand the development of the disease in the crop, two experiments with a split-plot design and three replications were established during spring-summer 2010 in different microenvironments: Ayapango and Temamatla. Three cultivars of maize (a tri-linear HS2 hybrid, the single-cross hybrid Triunfo and the native Cacahuacintle) were evaluated with three P. agglomerans isolates. In the three maize cultivars, chlorotic streaks appeared on new leaves; at the ripening stage, the symptoms were less perceptible. The average incidence of plants with chlorotic streaks was higher in the town of Temamatla than in Ayapango, and in both microenvironments, the average degree of severity was less than 40%. Isolate A was the most virulent (P < 0.0001) on the three cultivars evaluated. These results will provide the basis for effective management of the disease under environmental conditions similar to those evaluated in this research.

Author Biography

Alejandro Azaola Espinosa, Universidad Autónoma Metropolitana Calz del Hueso 1100, Coyoacán 04960, Tlalpan, CDMX Edificio N laboratorio 104
Investigador titular C. Investigador nacional nivel 1, Departamento Sistemas Biológicos. Laboratorio de Biiotecnología, N-104
Published
2018-01-22
Section
Scientific Papers