Hemileia vastatrix in Coffea spp.: Distribution of Urediniospores Grouped by Size and Insights into Morphological Structures
Por:
Pelayo-Sánchez, G, Yáñez-Morales, MD, Solano-Vidal, R, Silva-Rojas, HV, Alvarado-Rosales, D, Morales-Rodriguez, S, Jiménez-García, LF, Lara-Martínez, R, Ramírez-Ramírez, I, Valdez-Carrasco, JM
Publicada:
1 feb 2025
Resumen:
Hemileia vastatrix coffee leaf rust reduces Mexican coffee production by 51%. We aimed to analyze the size and distribution of H. vastatrix urediniospores among coffee plantations, as well as the morphological structures of the uredinium. In 2015, 65 leaf samples with rust symptoms were collected from 17 coffee cultivars grown at various altitudes (229-1649 m) under different environmental conditions in 14 regions of four Mexican states. A total of 30 spores per sample were measured and grouped using the Ward centroid method, and the group distribution was analyzed. Uredinia morphology was examined via electron microscopy, and the identity of the rust was confirmed. We identified eight significant spore groups. Groups 8h and 3a had the smallest and largest spores, respectively, which were distributed in two and one state, respectively, at different altitudes. The spores in groups 1b-7f were variable within the intermediate size range, and their distribution was at least one group per state under temperate, warm, and humid conditions. The uredinium had double-cell walls in the pedicels and urediniospores, a split septum, spores with hilum and protuberances, and an oval spore shape; anastomosis was detected on vegetative hyphae and haustoria. These findings may reflect gaps in knowledge in the biological cycle of this rust.
Filiaciones:
Pelayo-Sánchez, G:
Colegio Postgrad, Fitosanidad Fitopatol, Campus Montecillo,Km 36 5 Carretera Fed Mexico Tex, Texcoco 56264, Estado de Mexic, Mexico
Yáñez-Morales, MD:
Colegio Postgrad, Fitosanidad Fitopatol, Campus Montecillo,Km 36 5 Carretera Fed Mexico Tex, Texcoco 56264, Estado de Mexic, Mexico
Solano-Vidal, R:
Univ Autonoma Chapingo, Dept Parasitol Agr, Chapingo 56230, Estado de Mexic, Mexico
Silva-Rojas, HV:
Colegio Postgrad, Prod Semillas, Campus Montecillo,Km 36 5 Carretera Fed Mexico Tex, Texcoco 56264, Estado de Mexic, Mexico
Alvarado-Rosales, D:
Colegio Postgrad, Fitosanidad Fitopatol, Campus Montecillo,Km 36 5 Carretera Fed Mexico Tex, Texcoco 56264, Estado de Mexic, Mexico
Morales-Rodriguez, S:
Colegio Postgrad, Unidad Microscopia Elect, Campus Montecillo,Km 36 5 Carretera Fed Mexico Tex, Texcoco 56264, Estado de Mexic, Mexico
Jiménez-García, LF:
Univ Nacl Autonoma Mexico, Fac Ciencias, Dept Biol Celular, Circuito Exterior,Ciudad Univ, Ciudad De Mexico 04510, Mexico
Lara-Martínez, R:
Univ Nacl Autonoma Mexico, Fac Ciencias, Dept Biol Celular, Circuito Exterior,Ciudad Univ, Ciudad De Mexico 04510, Mexico
Ramírez-Ramírez, I:
Colegio Postgrad, Recursos Genet & Prod, Campus Montecillo,Km 36 5 Carretera Fed Mexico Tex, Texcoco 56264, Estado de Mexic, Mexico
Valdez-Carrasco, JM:
Colegio Postgrad, Fitosanidad Entomol, Campus Montecillo,Km 36 5 Carretera Fed Mexico Tex, Texcoco 56264, Estado de Mexic, Mexico
gold, All Open Access; Gold Open Access
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