annals-of-botany
Molecular phylogenetics of Eurasian Aster
The classification and phylogeny of Eurasian (EA) Aster remain poorly resolved. Li et al. use nrDNA ITS, and ETS and cpDNA trnL-F sequences to delimit
annals-of-botany
Nectar secretion in an ornithophilous bromeliad
Several members of Bromeliaceae show adaptations for hummingbird pollination in the Neotropics; however, the relationships between floral structure, nectar production and pollination are poorly understood. Stahl
annals-of-botany
Brassica monosomic alien addition lines
Addition of each chromosome of Brassica oleracea to the chromosome complement of B. rapa results in a series of nine monosomic alien addition lines. Heneen et
annals-of-botany
Reproductive barriers to interspecific Corymbia hybridization
Corymbia species have a high propensity to form interspecific hybrids. Dickinson et al. investigate the locations and activity of reproductive isolating barriers between species, and identify
annals-of-botany
Genetics of domestication of yardlong bean
The genetics of yardlong bean (Vigna unguiculata ssp. unguiculata cv.-gr. sesquipedalis), a vegetable form of cowpea, is of particular interest because the genome of this
annals-of-botany
Tree litter effects on understorey vegetation
Litter can affect plant population structure via both physical and chemical mechanisms, allowing or preventing different species to establish under different litter types. Baltzinger et al.
annals-of-botany
Timberline formation and dynamics
Altitudinal timberlines are thought to be moving upward as a result of global climate change. Takahashi et al. evaluate how the timberline has formed in a
annals-of-botany
Extreme phenotypic variation and fitness in lichens
Phenotypic variability is a successful strategy in lichens for colonizing different habitats. Pérez-Ortega et al. study the extreme phenotypic modifications shown by vagrant populations of
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Heterodichogamy avoids inbreeding in Kingdonia
Heterodichogamy, an unusual kind of reproductive heteromorphy, is hitherto unreported in Ranunculales and is known from only one other genus in the basal eudicots. Wang et
annals-of-botany
Costs of reproduction in a gynodioecious species
In gynodioecious species hermaphroditic plants coexist with female plants. Toivonen and Mutikainen find that experimentally increased reproductive output leads to differential costs of reproduction in the
annals-of-botany
Variable seed dormancy and germination in Hibbertia
Several ecologically important plant families in Mediterranean biomes have seeds with morphophysiological dormancy. Hidayati et al. study four species of the intractably dormant Australian genus Hibbertia
annals-of-botany
Mistletoes and mutant albino shoots as nutrient traps
Potassium, sulphur and zinc contents of mistletoe leaves are generally higher than in their hosts because elements that are cycled between xylem and phloem in the