Post-floral perianth functionality: contribution of persistent sepals to seed development in Helleborus foetidus (Ranunculaceae).

@article{Herrera2005PostfloralPF,
  title={Post-floral perianth functionality: contribution of persistent sepals to seed development in Helleborus foetidus (Ranunculaceae).},
  author={Carlos M. Herrera},
  journal={American journal of botany},
  year={2005},
  volume={92 9},
  pages={
          1486-91
        }
}
  • C. Herrera
  • Published 1 September 2005
  • Biology, Medicine
  • American journal of botany
The perianth persists after flowering in many plants, yet its post-floral functionality has been little investigated, and the few studies available provide ambiguous evidence. This paper tests the hypothesis that the green persistent sepals of the perennial herb, Helleborus foetidus, contribute to the plant's fitness by enhancing seed number and/or size. Post-floral contribution of the calyx to fruit and seed development was evaluated by manipulating sepal number and measuring the effect on… 
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38 References

Patterns of seed mass variation and their effects on seedling traits inAlliaria petiolata (Brassicaceae).

Differences in seed mass may affect seedling recruitment via effects on early seedling growth in this weedy species through changes in access to parental resources.

Developing fruit direct post-floral morphogenesis in Helleborus niger L.

In fertilized flowers of Helleborus niger L., the sepals grow, spread, and turn green, and the peduncles elongate, but these processes did not proceed to completion when the pistils were removed at the bud stage, but could be restored by the application of plant growth regulators.

Reproductive effort and floral photosynthesis in Spiranthes cernua (Orchidaceae).

The role of the inflorescence as a source and sink for carbon assimilation may lower the cost of reproduction and support frequent inflorescence production in Spiranthes cernua.

Carpels as leaves: meeting the carbon cost of reproduction in an alpine buttercup

It is plausible that the energy cost of male function equals or exceeds that of female function in this hermaphroditic species.

Geographical variation in autonomous self-pollination levels unrelated to pollinator service in Helleborus foetidus (Ranunculaceae).

Autonomous self-pollination may be considered as a mechanism enhancing plant reproductive success when plant access to pollen sources may limit seed production. We have studied the relationship…

Developmental Changes in Gas Exchange Activity in Flowers, Berries, and Tendrils of Field-Grown Cabernet Sauvignon

Gas-exchange activity and seasonal evolution of some anatomical and biological characteristics linked to CO 2 assimilation processes were analyzed in different green structures on field-grown Cabernet Sauvignon grapevine to indicate features that could have important physiological implications when modeling canopy carbon gain of grapevines.

Inter- and intra-floral heterogeneity of nectar production in Helleborus foetidus L. (Ranunculaceae)

Three southern Spanish populations of Helleborusfoetidus L. (Ranunculaceae) were sampled for nectar content in the absence of nectarivorous flower visitors, finding high variances in nectar abundance occurred also among nectaries within the same flower.

The effects of seed size, cotyledon reserves, and herbivory on seedling survival and growth in Quercus rugosa and Q. laurina (Fagaceae).

    C. Bonfil
    Biology, Medicine
    American journal of botany
  • 1998
The results show that seedlings originating from large seeds can better endure loss of cotyledons and aerial biomass and thus are better equipped to confront stress early in their lives.

Variation in structural gender in the hermaphrodite Helleborus foetidus (Ranunculaceae): within- and among-population patterns

The observed between-population variation in structural gender of Helleborus foetidus can be explained as a consequence of differences in self-pollination levels related to a flower’s “mating environment”.

Seedling establishment in Olea europaea: Seed size and microhabitat affect growth and survival1

It is concluded that establishment depended on microhabitats through facilitation and inhibition processes, and that seed size-related growth rate strongly affected seedling fate, it is noteworthy that the effectiveness of the size-correlated growth depended onmicrohabitat.