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Open Access item Biología y ecología de Viola cazorlensis, I. Variabilidad en caracteres florales

Other Titles:Inter and intrapopulation variation in floral characteristics is examined for eight populations of Viola cazorlensis, a narrow endemic, in the Sierra de Cazoria (Jaen province southeastern Spain). Peduncle, spur and nectaries length, nectar volume, and the nectaries/spur length ratio, are the floral traits examined. All these characters display considerable variation between flowers. Spurs show also broad variation in shape. Observed variation is due to both marked intrapopulation variability and significant differences between populations in average values for all traits. Differences between populations are not predictably related to their geographical separation. Results are discussed in relation to the endemic nature of the species and some aspects of its reproductive biology.
Authors:Herrera, Carlos M.
Keywords:Violaceae, Viola cazorlensi.c, diferenciación local, endemismo, morfologIa floral, variabilidad fenotIpica
Issue Date:1988
Publisher:CSIC - Real Jardín Botánico (RJB)
Citation:Anales del Jardín Botánico de Madrid (1988) 45: 233-24631-52
Abstract:Basándonos en ci análisis cualitativo y cuantitativo de ocho poblaciones de Ia Sierra de Cazorla, Jaén, se estudia Ia variaciOn intra e interpoblacional de varios caracteres florales de Viola cazorlensis. Se examinan en concreto longitud del pedOnculo, longitud del espolOn, longitud de los nectarios, cantidad (volumen) de nectar y Ia relación entre Ia longitud de los nectarios y del espoIón. Todos estos caracteres varlan considerablemente de unas flores a otras. Los espolones varlan ampliamente además en su forma. No sOlo es intrapobiacional sino que muestra diferencias significativas de sus valores medios entre las diferentes pobla­ ciones (diferenciaciOn local de las poblaciones). Las diferencias entre poblaciones no guar­ dan una relaciOn directa con Ia distancia geográfica entre las mismas. Se analizan los resulta­ dos a Ia luz de los datos disponibles sobre Ia biologfa reproductiva de Ia planta y siempre teniendo en cuenta su carácter de endemismo local.
Inter and intrapopulation variation in floral characteristics is examined for eight populations of Viola cazorlensis, a narrow endemic, in the Sierra de Cazoria (Jaen province southeastern Spain). Peduncle, spur and nectaries length, nectar volume, and the nectaries/spur length ratio, are the floral traits examined. All these characters display considerable variation between flowers. Spurs show also broad variation in shape. Observed variation is due to both marked intrapopulation variability and significant differences between populations in average values for all traits. Differences between populations are not predictably related to their geographical separation. Results are discussed in relation to the endemic nature of the species and some aspects of its reproductive biology.
Publisher version (URL):http://www.rjb.csic.es/jardinbotanico/ficheros/documentos/pdf/anales/1988/Anales_45%281%29_233_246.pdf
URI:http://hdl.handle.net/10261/44717
Appears in Collections:(EBD) Artículos

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