Nonflowers near the base of extant angiosperms? Spatiotemporal arrangement of organs in reproductive units of Hydatellaceae and its bearing on the origin of the flower.
- P. Rudall, M. Remizowa, G. Prenner, C. Prychid, R. Tuckett, D. Sokoloff
- BiologyAmerican-Eurasian journal of botany
- 2009
Teratological forms of T. submersa indicate a tendency to fasciation and demonstrate that the inside-out structure-the primary feature that separates RUs of Hydatellaceae from more orthodox angiosperm flowers-can be at least partially modified, thus producing a morphology that is closer to an orthodox flower.
Identification and characterization of the water gap in the physically dormant seeds of Dodonaea petiolaris: a first report for Sapindaceae.
The water gap in D. petiolaris seeds was identified as a small plug in the seed coat adjacent to the hilum and opposite the area where the radicle emerges, which is similar to water gaps in some of the other plant families with PY.
Dormancy, germination and seed bank storage: a study in support of ex situ conservation of macrophytes of southwest Australian temporary pools
- R. Tuckett, D. Merritt, F. Hay, S. Hopper, K. Dixon
- Environmental Science
- 1 May 2010
It appears that seeds of most species are able to germinate upon inundation as long as they are situated at the soil surface and respond to the first rains of the season providing prompt ecological cuing in an environment vulnerable to rapid drying events.
Comparative ovule and megagametophyte development in Hydatellaceae and water lilies reveal a mosaic of features among the earliest angiosperms.
- P. Rudall, M. Remizowa, D. Sokoloff
- BiologyAnnals of Botany
- 1 May 2008
Most features of the ovule and embryo sac of Trithuria are consistent with a close relationship with other Nymphaeales, especially Cabombaceae.
Seedling diversity in Hydatellaceae: implications for the evolution of angiosperm cotyledons.
- D. Sokoloff, M. Remizowa, P. Rudall
- Environmental ScienceAnnals of Botany
- 21 November 2007
The sheathing structure that is present in seedlings of some Hydatellaceae could be homologized with the two united cotyledons of water lilies, and hence demonstrates a possible pathway of the origin of a monocot-like embryo, though no homology is implied.
Unique stigmatic hairs and pollen-tube growth within the stigmatic cell wall in the early-divergent angiosperm family Hydatellaceae.
- C. Prychid, D. Sokoloff, M. Remizowa, R. Tuckett, S. Yadav, P. Rudall
- BiologyAnnals of Botany
- 1 September 2011
The presence of a dry-type stigma in Trithuria supports the hypothesis that this condition is ancestral in angiosperms and makes Hydatellaceae a useful model for comparative studies of pollen-tube growth in early angios perms.
Seed fertilization, development, and germination in Hydatellaceae (Nymphaeales): Implications for endosperm evolution in early angiosperms.
- P. Rudall, T. Eldridge, D. Sokoloff
- BiologyAmerican-Eurasian journal of botany
- 1 September 2009
New data on endosperm development in the early-divergent angiosperm Trithuria (Hydatellaceae) indicate that double fertilization results in formation of cellularized micropylar and unicellular…
Do Hydatellaceae belong to the monocotyledons or basal angiosperms? Evidence from seedling morphology
- H. Tillich, R. Tuckett, E. Facher
- Environmental Science
- 14 December 2007
Seedling morphology does not support the assignment of the Hydatellaceae to the Nymphaeales and basal angiosperms, respectively, and the results are discussed in the light of recent molecular analyses.
A new type of specialized morphophysiological dormancy and seed storage behaviour in Hydatellaceae, an early-divergent angiosperm family.
- R. Tuckett, D. Merritt, K. Dixon
- Biology, Environmental ScienceAnnals of Botany
- 1 June 2010
Seeds of Hydatellaceae have a new kind of specialized morphophysiological dormancy in which neither root nor shoot differentiates until after the embryo emerges from the seed coat.
Comparative longevity and low-temperature storage of seeds of Hydatellaceae and temporary pool species of south-west Australia
- R. Tuckett, D. Merritt, F. Hay, S. Hopper, K. Dixon
- Environmental Science
- 13 July 2010
Given the high conservation value of Hydatellaceae species and the potential short-lived nature of seeds of some of the species, it is recommended that ex situ conservation programs for these aquatic species should consider cryopreservation as a means to maximise the longevity of their seeds.
...
...