Mature seed samples from 35 populations ofEchinochloawere collected in fields of the Eastern Iberian Peninsula and evaluated for nine morphologic traits. Four kernels per population were separately assayed for four isozyme systems. Genetic variability components were studied by correspondence analysis and chi-square distance using the isozyme pattern as variables. Genetic uniformity was found within populations as would be expected from their autogamous mating system. Intraspecific isozyme variability covered a wide spectrum, from none inE. colonumto very high inE. oryzoides. All the populations ofE. colonumclustered together based on morphometric and isozymatic characters, and also those ofE. oryzicola, but were distinct from the populations of all other species. Populations ofE. crus-galli, E. hispidula, andE. oryzoidesclustered within species based on morphology, but did not cluster based on isozymatic characters, being mixed in the isozymatic dendrogram. Our results support the hypothesis thatE. hispidulaandE. oryzoidesare infraspecific taxa ofE. crus-galli. The large between-population genetic variability may explain the differential response to herbicides within a given species and indicate that weed specialists should study the differences in response to a wide spectrum ofEchinochloapopulations to several herbicides instead of testing many plants from a small number of populations.
De los 49 táxones registrados (29 emergentes y 20 flotantes o sumergidos) 11 son exóticos introducidos, de los cuales los más importantes son Echinochloa oryzoides y E. oryzicolaen ambas zonas, además de Cyperus difformis y Echinochloa hispidula en Valencia, y el resto propios de la flora autóctona, predominando Scirpus maritimus, Alisma plantago-aquatica. Echinochloa crus-galli y Paspalum distichum como emergentes, Lemna minor y L. gibba como flotantes, Potamogeton nodosus, Zannichellia palustris y Najas minor como sumergidos y Chara vulgaris, Cladophora glomerata, Oedogonium capilliforme. Spirogyra spp., Pirhophora oedogonia e Hydrodictyon reticulatum como algas macroscópicas. Se analiza la evolución experimentada por la flora en los últimos años, además de estudiar las comunidades vegetales presentes y de indicar la importancia de las distintas clases fitosociológicas en su contribución a la flora arvense del cultivo.
reporte de 4 casos clínicos y revisión de la literatura. / Ameloblastic fibroma: a report of 4 clinical cases and review of the literature.. j.maxilo 2022.
Se aporta información sobre la distribución y ecología de las carofíceas de la provincia de Valencia, a partir del estudio de 88 localidades distintas. De los 15 táxones registrados, Chara canescens, C. connivens y C. galioides corresponden a nuevas citas provinciales. Se presentan los principales parámetros físicoquímicos del agua para cada especie.
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