Morphological changes of the leaf surfaces of Zea mays induced by rayado fino virus infection

Morphological changes of the leaf surfaces of Zea mays induced by rayado fino virus infection
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Morphological changes of the leaf surfaces of Zea mays induced by rayado fino virus infection

Naturally infected field-grown or greenhouse inoculated maize leaves were used to study the anatomical changes caused by rayado fino virus infection. Infected leaves showed the typical symptoms of the disease, characterized by the appearance of small chlorotic spots in the costal regions of the adax...

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Translated title: Morphological changes of the leaf surfaces of Zea mays induced by rayado fino virus infection
Journal Title: Revista de Biología Tropical
Main Author: Eugenia M. Flores
Language: English
Get full text: http://revistas.ucr.ac.cr/index.php/rbt/article/view/25704
Resource type: Journal article
Source: Revista de Biología Tropical; Vol 27, No 1 (Year 1979).
DOI: http://dx.doi.org/10.15517/rbt.v27i1.25704
Publisher: Universidad de Costa Rica
Usage rights: Reconocimiento - NoComercial - SinObraDerivada (by-nc-nd)
Subjects: Sciences --> Biology
Sciences --> Marine & Freshwater Biology
Applied Sciences --> Agriculture, Multidisciplinary
Abstract: Naturally infected field-grown or greenhouse inoculated maize leaves were used to study the anatomical changes caused by rayado fino virus infection. Infected leaves showed the typical symptoms of the disease, characterized by the appearance of small chlorotic spots in the costal regions of the adaxial surface, which may extend to the intercostal zones with increasing severity of the disease. Examination of the chlorotic areas by scanning eIectron microscope reveals abnormal development and reduction in size of stomata and guard cells, or failure of formation of stomata. Reduction in size of the stomatal structures progresses towards the proximal end of the leaf blade and seems to be correlated with intercalary growth. Chlorotic areas appear almost glabrous since macrohairs, typical of the costal areas of healthy leaves, fail to develop. However; microhairs proliferate in other areas covering the veins. Epidermal, siliceous and bulliform cells show abnormal development in severely affected areas.
Translated abstract: Hojas de maíz naturalmente infectadas o inoculadas en el invernadero para estudiar los efectos anatómicos causados por el virus del rayado fino muestran pequeñas manchas cIoróticas, típicas de la enfermedad, en las regiones costales de la superficie adaxial, que pueden extenderse a las zonas intercostales al aumentar la severidad de la infección. El examen de las áreas cIoróticas al microscopio electrónico de rastreo revela desarrollo anómalo y reducción de los poros estomáticos y células guardianas. En ciertas áreas muy afectadas no se observan estomas. La reducción en tamaño de las estructuras estomáticas aumenta hacia la parte proximal de la lámina, y parece correlacionarse con el crecimiento basal de la lámina que produce el meristema intercalar. Las áreas cIoróticas aparecen casi glabras, ya que no se desarrollan los macropelos característicos de las zonas costales en las áreas verdes. Sin embargo, ocurre proliferación de micropelos a lo largo de las venas, dificultando su visualización. Las células epidérmicas, silíceas y buliformes muestran desarrollo anómalo en áreas severamente afectadas.