Phenotypic plasticity in Diplotaxis erucoides
Abstract
Diplotaxis erucoides is a wide-spread mediterranean weed, which exhibit high levels of phenotypic plasticity in its center of distribution. This is especially true for those traits showing adaptation to saisonal climatic changes such as flowering time, leaf morphology and leaf/stem anatomy. It has been shown that on Sicily several different phenotypesco-occur on the same arable fields. The consequence is, that also the soil seed bank represents seeds from all of these phenotypes. The population are characterized by mesophytic subpopulations (occuring during the winter season with higher humidity and lower temperatures) and xerophytic subpopulations (during the summer season with low humidity and high temperatures). The question arise, if the soil seed bank reflects the differentiation of the actual vegetation and if the soil seed bank serves as a genetic buffer. For this purpose several populations from the center of the distribution range will be analysed considering individuals from the aboveground subpopulations as well as from the soil seed bank comprising all of the different phenotypes. A combination of diffrent methods will be applied: morphometry, reproductive analysis, anatomical studies, germination experiments, genetic analysis using molecular techniques such as DNA analysis (AFLPs) and isozyme analysis.
keywords Diplotaxis erucoides seed soil bank mediterranean weed phenotypic plasticity
Publikationen
Diplotaxis erucoides in Sicily: how is genetic variation distributed among generations and populations
Autoren: Unterluggauer, P., Kropf, M., Bernhardt, K.-G. Jahr: 2006
Conference & Workshop proceedings, paper, abstract
Diplotaxis erucoides in Sizilien: Wie ist die genetische Variation zwischen saisonalen Generationen und Populationen verteilt?
Autoren: Unterluggauer, P., Kropf, M., Bernhardt, K.-G. Jahr: 2006
Journal articles
Chorispora tenella, Diplotaxis erucoides und Capsella rubella (Brassicaceae) in Wien und Niederösterreich
Autoren: Bernhardt, K -G; Laubhann, D; Kropf, M Jahr: 2008
Journal articles
Project staff
Karl Georg Bernhardt
Univ.-Prof. i.R. Dipl.Geograph Dr. Karl Georg Bernhardt
karl-georg.bernhardt@boku.ac.at
Tel: +43 1 47654-83111
Project Leader
01.12.2003 - 14.12.2007
Matthias Kropf
Priv.-Doz. Dipl.-Biol. Dr.rer.nat. Matthias Kropf
matthias.kropf@boku.ac.at
Tel: +43 1 47654-83413
Project Staff
01.12.2003 - 14.12.2007