Herkogamy and Its Effects on Mating Patterns in Arabidopsis thaliana
Open Access
- 26 February 2013
- journal article
- research article
- Published by Public Library of Science (PLoS) in PLOS ONE
- Vol. 8 (2), e57902
- https://doi.org/10.1371/journal.pone.0057902
Abstract
The evolution of mating systems, which exhibit an extraordinary diversity in flowering plants, is of central interest in plant biology. Herkogamy, the spatial separation of sexual organs within flowers, is a widespread floral mechanism that is thought to be an adaptive trait reducing self-pollination in hermaphroditic plants. In contrast with previous studies of herkogamy that focused on plants with relatively large floral displays, we here characterized herkogamy in Arabidopsis thaliana, a model plant with a strong selfing syndrome. Developmental features, reproductive consequences, and genetic architecture of herkogamy were exploited using naturally variable A. thaliana accessions, under both greenhouse and natural conditions. Our results demonstrate that the degree of herkogamy can strongly influence the mating patterns of A. thaliana: approach herkogamy can effectively promote outcrossing, no herkogamy is also capable of enhancing the opportunity for outcrossing, and reverse herkogamy facilitates efficient self-pollination. In addition, we found that the expression of herkogamy in A. thaliana was environment-dependent and regulated by multiple quantitative trait loci. This study reveals how minor modifications in floral morphology may cause dramatic changes in plant mating patterns, provides new insights into the function of herkogamy, and suggests the way for dissecting the genetic basis of this important character in a model plant.Keywords
This publication has 44 references indexed in Scilit:
- Natural Variation in Arabidopsis: From Molecular Genetics to Ecological GenomicsPlant Physiology, 2011
- The selfing syndrome: a model for studying the genetic and evolutionary basis of morphological adaptation in plantsAnnals of Botany, 2011
- Local-Scale Patterns of Genetic Variability, Outcrossing, and Spatial Structure in Natural Stands of Arabidopsis thalianaPLoS Genetics, 2010
- The Scale of Population Structure in Arabidopsis thalianaPLoS Genetics, 2010
- Correlated evolution of mating system and floral display traits in flowering plants and its implications for the distribution of mating system variationNew Phytologist, 2009
- A Dual Role for the S-Locus Receptor Kinase in Self-Incompatibility and Pistil Development Revealed by an Arabidopsis rdr6 MutationPlant Cell, 2009
- Natural Genetic Variation ofArabidopsis thalianaIs Geographically Structured in the Iberian PeninsulaGenetics, 2008
- Demographic history of European populations of Arabidopsis thalianaPLoS Genetics, 2008
- Changes in Regulation of a Transcription Factor Lead to Autogamy in Cultivated TomatoesScience, 2007
- Genetic mechanisms and evolutionary significance of natural variation in ArabidopsisNature, 2006