A novel disease of big-leaf mahogany caused by two fusarium species in Mexico
Por:
Santillan-Mendoza, R., Fernandez-Pavia, S. P., O'Donnell, K., Ploetz, R. C., Ortega-Arreola, R., Vazquez-Marrufo, G., Benitez-Malvido, J., Montero-Castro, J. C., Soto-Plancarte, A., Rodriguez-Alvarado, G.
Publicada:
1 oct 2018
Resumen:
Big-leaf mahogany (Swietenia macrophylla) is valued for its high-quality wood and use in urban landscapes in Mexico. During surveys of mango-producing areas in the central western region of Mexico, symptoms of malformation, the most important disease of mango in the area, were observed on big-leaf mahogany trees. The objectives of this research were to describe this new disease and determine its cause. Symptoms on big-leaf mahogany at four sites in Michoacán, Mexico resembled those of the vegetative phase of mango malformation, including compact, bunched growth of apical and lateral buds, with greatly shortened inter-nodes and small leaves that curved back toward the supporting stem. Of 163 isolates that were recovered from symptomatic tissues, most were identified as Fusarium pseudocircinatum (n = 121) and F. mexicanum (n = 39) using molecular systematic data; two isolates represented unnamed phylospecies within the F. incarnatum-equiseti species complex (FIESC 20-d and FIESC 37-a) and another was in the F. solani species complex (FSSC 25-m). However, only F. mexicanum and F. pseudocircinatum induced malformation symptoms on 14-day-old seedlings of big-leaf mahogany. The results indicate that F. mexicanum and F. pseudocircinatum, previously reported in Mexico as causal agents of mango malformation disease, also affect big-leaf mahogany. This is the first report of this new disease and the first time that F. mexicanum was shown to affect a host other than mango. © 2018 The American Phytopathological Society.
Filiaciones:
Santillan-Mendoza, R.:
UMSNH, IIAF, Lab Patol Vegetal, Km 9-5 Carr, Morelia, Michoacan, Mexico
Fernandez-Pavia, S. P.:
UMSNH, IIAF, Lab Patol Vegetal, Km 9-5 Carr, Morelia, Michoacan, Mexico
O'Donnell, K.:
USDA ARS, Mycotoxin Prevent & Appl Microbiol Res Unit, Natl Ctr Agr Utilizat Res, Peoria, IL 61604 USA
Ploetz, R. C.:
Univ Florida, Trop Res & Educ Ctr, Dept Plant Pathol, Homestead, FL 33031 USA
Ortega-Arreola, R.:
Inst Nacl Invest Forestales Agr & Pecuarias, Campo Expt Tecoman, Tecoman 28100, Colima, Mexico
Vazquez-Marrufo, G.:
UMSNH, FMVZ, Ctr Multidisciplinario Estudios Biotecnol, Morelia, Michoacan, Mexico
Benitez-Malvido, J.:
Univ Nacl Autonoma Mexico, Inst Invest Ecosistemas & Sustentabilidad, Antigua Carretera Patzcuaro 8701, Morelia 58190, Michoacan, Mexico
Montero-Castro, J. C.:
UMSNH, Fac Biol, Cd Univ, Morelia 58060, Michoacan, Mexico
Soto-Plancarte, A.:
UMSNH, IIAF, Lab Patol Vegetal, Morelia, Michoacan, Mexico
Rodriguez-Alvarado, G.:
UMSNH, IIAF, Lab Patol Vegetal, Morelia, Michoacan, Mexico
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