2 Citations
Complex reproductive secretions occur in all extant gymnosperm lineages: a proteomic survey of gymnosperm pollination drops
- Environmental SciencePlant Reproduction
- 2018
It is demonstrated that all extant gymnosperm groups produce complex reproductive secretions containing proteins, an ancient trait that likely contributed to the evolutionary success of seed plants.
Best in the company of nearby males: female success in the threatened cycad, Zamia portoricensis
- Environmental SciencePeerJ
- 2018
The possible mate-finding Allee effect indicates that pollinator movement among plants may be limited for this mutually dependent plant-pollinator interaction, and being close to male plants is a matter of chance.
References
SHOWING 1-10 OF 29 REFERENCES
On the Formation of Proembryo of Ginkgo biloba L.
- Physics
- 1928
The fertilization and the formation of the embryo of Ginkgo have been studied by HIRASE (1895, 1918), IKENO (1901), and more recently by HERZFELD (1926, 1927). Yet there are many unsolved problems,…
Life History of Encephalartos
- BiologyBotanical Gazette
- 1924
No proembryos were found containing sperm remnants, indicating that fertilization by a sperm is not necessary for the production of the pro Embryo, suggesting a probability of fusion of egg and ventral canal nuclei.
A Morphological Comparison of Leaflets of a Hybrid Cycad and the Two Parents
- BiologyBotanical Gazette
- 1928
A morphological study of the leaflets of a hybrid cycad obtained from a cross between Ceratozamia mexicana and a new species, Zamia monticola, shows that some of the structures distinctly resemble…
On the Structure and Affinities of Acmopyle Pancheri, Pilger
- Geology
- 1921
An investigation of some material collected in New Caledonia by Prof. R. Compton, M. A., during his expedition to that island in 1914 is undertaken.
Female Gametophyte of Microcycas
- BiologyBotanical Gazette
- 1924
1. The ovules were not young enough to show the megaspore mother cell or the megaspores, the youngest stage of the female gametophyte showing free nuclear condition in the megaspore. 2. In older…
The Caytoniales, a New Group of Angiospermous Plants from the Jurassic Rocks of Yorkshire
- Geology
- 1925
The study of fossil plants during the last quarter of a century has revealed a vast amount of information about the past history of many modern plant types. But while we have learned much about the…
Some Characters of Xylem Tissue in Cycads
- GeologyBotanical Gazette
- 1920
A study of the primary and secondary wood of Cycads indicates the development of reticulate, alternate, and opposite pitting directly from scalariform types, which is considered the most primitive in living seed plants.
Clogging of Stomata of Conifers in Relation to Smoke Injury and Distribution
- Environmental ScienceBotanical Gazette
- 1924
1. The black deposit found in the stomatal pits of certain conifers, and thought to be soot, was found to be a natural product of the leaf. 2. The substance in the stomata of juniper, fir, and…