Establishment of a natural floral variant of Shepherd's purse in the wild: analysis of life-history traits in `Capsella apetala' (Brassicaceae)

DC FieldValueLanguage
dc.contributor.authorHameister, Steffen
dc.contributor.authorNeuffer, Barbara
dc.date.accessioned2021-12-23T16:09:46Z-
dc.date.available2021-12-23T16:09:46Z-
dc.date.issued2017
dc.identifier.issn20323913
dc.identifier.urihttps://osnascholar.ub.uni-osnabrueck.de/handle/unios/8981-
dc.description.abstractBackground and aims - Molecular studies in model systems have pushed forward our understanding of floral developmental genetics, but the evolutionary significance of such modifications in natural populations is rather unexplored. To improve our knowledge in this field, the sympatric occurrence of two floral variants of Capsella bursa-pastoris (L.) Medik. in the wild appears to be an ideal model system. In our study, wild type plants showing small white petals and the homeotic variant `Starnenoid petals' (Spe also known as Capsella apetala Opiz), in which petals are replaced by additional stamens, will be compared to evaluate potential ecological differentiation. Material and methods - Progenies from field collections were used in common garden experiments to detect possible differences in several life-history traits involved in the reproductive fitness of both variants. A second experiment was intended to shed light on the relative hybridization rate among floral variants, using the enzyme aspartate amino transferase (AAT) as a molecular marker. Results - Comparing fitness revealed that the two variants invested differently into their progeny. Wild-type plants showed more fruits per plant, whereas Spe showed higher investment in seeds per fruit. However, the overall reproductive output (seeds/plant) is almost equal. Wild-type donates more pollen for cross-fertilization, because floral visits are more common in this variant. Furthermore, both variants are separated in the onset of flowering, with Spe having a significant later onset of flowering. Conclusion - We conclude that the maintenance of the floral variant within a broad wild-type population is driven by complementary mechanisms including high rates of self-fertilization and ecological differentiation. Taking into account that fitness is not reduced in Spe, the floral variant might in fact have the potential to be a promising model to study speciation at an early stage.
dc.description.sponsorshipDeutsche Forschungsgemeinschaft DFGGerman Research Foundation (DFG) [NE314/7-1, NE314/7-2, TH417/4-1, TH417/4-2]; The authors wish to thank L. Schmitz and B. von Reveling for performing of field experiments, and U. Coja and R. Grupe for technical assistance. We are grateful to G. Theissen and J.Ziermann for helpful discussion on unpublished data and H. Hurka for valuable comments on the manuscript. We thank the local authorities of Rhineland-Pfalz for permission to collect insect specimens and N. Exeler for support on wild bee determination. We also thank two anonymous reviewers for helpful comments on an earlier version of the manuscript. Financial support by the Deutsche Forschungsgemeinschaft DFG (NE314/7-1 and 2; TH417/4-1 and -2) is gratefully acknowledged.
dc.language.isoen
dc.publisherSOC ROYAL BOTAN BELGIQUE
dc.relation.ispartofPLANT ECOLOGY AND EVOLUTION
dc.subjectADAPTATION
dc.subjectBURSA-PASTORIS
dc.subjectCapsella
dc.subjectDEVELOPMENTAL GENETICS
dc.subjectEVOLUTION
dc.subjectfield experiment
dc.subjectfitness
dc.subjectFloral homeotic variant
dc.subjectFLOWER SIZE
dc.subjectflower visitors
dc.subjectGENETIC DIFFERENTIATION
dc.subjectMIMULUS-GUTTATUS
dc.subjectMODEL SYSTEM
dc.subjectMORPHOLOGY
dc.subjectoutcrossing
dc.subjectPlant Sciences
dc.subjectPOPULATIONS
dc.titleEstablishment of a natural floral variant of Shepherd's purse in the wild: analysis of life-history traits in `Capsella apetala' (Brassicaceae)
dc.typejournal article
dc.identifier.doi10.5091/plecevo.2017.1167
dc.identifier.isiISI:000398878300007
dc.description.volume150
dc.description.issue1
dc.description.startpage67
dc.description.endpage75
dc.identifier.eissn20323921
dc.publisher.placeNIEUWELAAN 38, B-1860 MEISE, BELGIUM
dcterms.isPartOf.abbreviationPlant Ecol. Evol.
crisitem.author.deptFB 05 - Biologie/Chemie-
crisitem.author.deptidfb05-
crisitem.author.parentorgUniversität Osnabrück-
crisitem.author.netidNeBa468-
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