Allocation to Floral Structures in Thalictrum pubescens (Ranunculaceae), a Cryptically Dioecious Species
نویسندگان
چکیده
منابع مشابه
Ovule discounting in an outcrossing, cryptically dioecious tree.
Ovule discounting denotes the reduction in the number of ovules available for cross-fertilization due to the interference of inferior pollen. Traditionally, ovule discounting has been discussed solely from the perspective of compromised outcrossing opportunities as a result of selfing, but the principle is more general. Here, we extend its applicability beyond the simple contrast between selfin...
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A new species of dioecious Solanum from the Australian "Dioicum Complex" of Solanum subgenus Leptostemonum is described. Solanum cowiei Martine sp. nov., is allied with other members of this problematic lineage, but differs in its slender leaves, limited armature and diminutive habit. The species was first segregated by botanists at the Northern Territory Herbarium as Solanum sp. Litchfield (I....
متن کاملPhylogenetic insights into the correlates of dioecy in meadow-rues (Thalictrum, Ranunculaceae).
Numerous studies have examined the evolution of sexual systems in angiosperms, but few explore the interaction between these and the evolution of pollination mode. Wind pollination is often associated with unisexual flowers, but which evolved first and played a causative role in the evolution of the other is unclear. Thalictrum, meadow-rues (Ranunculaceae), provides a unique opportunity to stud...
متن کاملFunction and evolution of sterile sex organs in cryptically dioecious Petasites tricholobus (Asteraceae).
BACKGROUND AND AIMS Why are sterile anthers and carpels retained in some flowering plants, given their likely costs? To address this question, a cryptically dioecious species, Petasites tricholobus, in which male and female plants each have two floret types that appear pistillate and hermaphroditic, was studied. The aim was to understand the function of sterile hermaphroditic florets in females...
متن کاملTiming and consequences of recurrent polyploidy in meadow-rues (thalictrum, ranunculaceae).
The discovery of ancient whole-genome duplications in eukaryotic lineages has renewed the interest in polyploidy and its effects on the diversification of organisms. Polyploidy has large-scale effects on both genotype and phenotype and has been linked to the evolution of genome size, dioecy, and changes in ecological interactions, such as pollinator visitation. Here, we take a molecular systema...
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ژورنال
عنوان ژورنال: Annals of Botany
سال: 2002
ISSN: 1095-8290,0305-7364
DOI: 10.1093/aob/mcf158