Subdioecy in Consolea spinosissima (Cactaceae): breeding system and embryological studies.

@article{Strittmatter2002SubdioecyIC,
  title={Subdioecy in Consolea spinosissima (Cactaceae): breeding system and embryological studies.},
  author={Lara I Strittmatter and Vivian Negr{\'o}n-Ort{\'i}z and R. James Hickey},
  journal={American journal of botany},
  year={2002},
  volume={89 9},
  pages={
          1373-87
        }
}
The breeding system and the embryology of Consolea spinosissima, a tree-like opuntioid endemic to Jamaica, were investigated. Morphological and embryological studies revealed that the species is subdioecious, with three sexual morphs present in the 150 × 120 m plot studied at Hellshire Hills, Jamaica. The female morph has pistillate flowers with open stigma lobes, no pollen grains, and sets fruit. The male morph has cryptic staminate flowers with closed stigma lobes, viable pollen grains, and a… Expand
Cryptic Dioecy in Consolea (Cactaceae): Sex Determination & Evolutionary Implications
TLDR
The main breeding system in Consolea is cryptic dioecy, with some taxa subdioecious, and it is hypothesized that a single origin for this breeding system based on the uniformity of the anther and ovule abortive processes in pistillate and staminate flowers respectively. Expand
Embryology of Mammillaria dioica (Cactaceae) reveals a new male sterility phenotype
TLDR
This study describes breeding system and embryology of M. dioica from a population at Baja California Sur, Mexico, through the careful examination of floral morphology and by using light and scanning electron microscopy at different stages of floral development. Expand
Trioecy in Coccoloba cereifera Schwacke (Polygonaceae), a narrow endemic and threatened tropical species
TLDR
Trioecy, the co-occurrence of the males, females, and hermaphrodite morphs in natural populations, is a rare and poorly studied breeding system in Coccoloba cereifera from the rupestrian fields of Serra do Cipo, southeastern Brazil. Expand
Comparative development of staminate and pistillate flowers in the dioecious cactus Opuntia robusta
TLDR
It is demonstrated that PCD is recruited in both pistillate and staminate flower development; however, it occurs at different times of floral development. Expand
Heterochrony and its role in sex determination of cryptically dioecious Consolea (Cactaceae) staminate flowers
TLDR
Staminate expression in Consolea appears to be controlled by a common, genetically determined heterochronic ovule developmental programme affecting the relative timing of ovule receptivity and flower opening, the first report of heterochrony as a mechanism of male sex determination. Expand
Functional dioecy in Gleditsia amorphoides (Fabaceae)
TLDR
Flower morphology, experimentally tested the breeding system and analysed flower visitors indicated that G. amorphoides staminate flowers produce viable pollen grains and that perfect flowers have a functional gynoecium and empty anthers, where pollen abortion occurs early in floral development. Expand
Embryological studies in Melia azedarach L.1,2
TLDR
It is shown that all the flowers of the inflorescence present both gynoecium and androecium but only the terminal ones produce fruits, which ensures good seed production in this species and that is what makes it a highly invasive species. Expand
Comparative anther and pollen tetrad development in functionally monoecious Pseuduvaria trimera (Annonaceae), and evolutionary implications for anther indehiscence
TLDR
Anther and pollen development were compared in both male and functionally female flowers using histological observations to test whether anther indehiscence results from a sporophytic and (or) gametophytic default. Expand
An anatomical study of floral variation in Thymelaea hirsuta (L.) Endl. related to sexual dimorphism
TLDR
The point of transition from hermaphroditic to unisexual flowers is clarified: in female flowers the stamens arrest their development after a few mitotic divisions of the sporogenous tissue, while in male flowers ovule development is stopped after the first meiotic division. Expand
Comparative microsporangium development in male‐fertile and male‐sterile flowers of Consolea (Cactaceae): When and how does pollen abortion occur
TLDR
It is hypothesize a single origin for the cryptically dioecious/subdioeciously breeding system of Consolea based on the uniformity of the anther's abortive processes in pistillate flowers. Expand
...
1
2
3
4
...

References

SHOWING 1-10 OF 51 REFERENCES
MORPHOLOGY, VASCULAR ANATOMY AND EMBRYOLOGY OF PISTILLATE AND STAMINATE FLOWERS OF ASPARAGUS OFFICINALIS
TLDR
Since manipulation of sex expression in Asparagus could be important in developing inbred male and female lines for breeding purposes, those aspects of the morphological and embryological observations presented might be useful in planning experiments to induce sex changes. Expand
Dioecy and wind pollination in Pernettya rigida (Ericaceae) of the Juan Fernández Islands
TLDR
It is concluded that pollen is transferred abiotically and the ever-present wind over the exposed ridges of the islands is the likely dispersal agent. Expand
Reproductive biology of a rare cactus, Opuntia spinosissima (Cactaceae), in the Florida Keys: why is seed set very low?
TLDR
It is hypothesize that O. spinosissima is a sterile polyploid and that the 13 extant plants are asexually derived from a single lineage. Expand
FUNCTIONAL DIOECY IN ECHINOCEREUS COCCINEUS (CACTACEAE): BREEDING SYSTEM, SEX RATIOS, AND GEOGRAPHIC RANGE OF FLORAL DIMORPHISM'
TLDR
The breeding system of the hedgehog cactus, Echinocereus coccineus Engelm, was studied at two sites in the northern Chihuahuan Desert, New Mexico and floral dimorphism appears confined to eastern and northwestern populations. Expand
The breeding system of Ramosmania heterophylla—dioecy or heterostyly?
TLDR
Investigation of Ramosmania heterophylla at Kew showed that pollen is viable and that embryo sacs appear fully developed, and that lack of seed set is a result of the non-functional stigmas on short styles. Expand
REPRODUCTIVE BIOLOGY AND RELATIVE MALE AND FEMALE FITNESS IN A TRIOECIOUS CACTUS, PACHYCEREUS PRINGLEI (CACTACEAE)'
TLDR
Fitness differences are insufficient to explain the occurrence of trioecy in this species, which is strongly pollinator-dependent in females but much less so in hermaphrodites. Expand
Characteristics of self-incompatibility in Schlumbergera truncata and S. x buckleyi (Cactaceae)
The influence of self-incompatibility (SI) on fruit set, seed set, and pollen tube growth was investigated in Schlumbergera truncata (Haworth) Moran and S.xbuckleyi (T. Moore) Tjaden. FourExpand
Reproductive ecology and inbreeding depression in Opuntia rastrera (Cactaceae) in the Chihuahuan Desert : why are sexually derived recruitments so rare?
TLDR
Floral characteristics and the pollen/ovule ratio suggest that Opuntia rastrera is a facultative xenogamous species; it is also selfcompatible, but there is strong inbreeding depression for fruit set; however, it was unable to demonstrate differences in reproductive characters between the populations in both vegetation types. Expand
Stamens are not essential as an attractant for pollinators in females of cryptically dioecious Thalictrum pubescens Pursch. (Ranunculaceae)
  • S. Davis
  • Biology
  • Sexual Plant Reproduction
  • 1997
TLDR
The role of pollinators in the maintenance of sterile stamens in the cryptically dioecious species, Thalictrum pubescens, is examined; wind was found to contribute to pollination; branches of female T.pubescens enclosed in cheesecloth to exclude insects but not wind were still able to set seed, suggesting females may not need the stamENS for pollination. Expand
Five Evolutionary Pathways to Subdioecy
  • M. Ross
  • Biology
  • The American Naturalist
  • 1982
TLDR
A genetic model which represents both hermaphrodite or monoecious populations, and their direct differentiation toward dioecy is given, and several selection models, involving fertility variation, resource allocation, sexual selection, and overdominance, are shown to be equivalent. Expand
...
1
2
3
4
5
...