Results 211 to 220 of about 3,609 (241)
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DIOECY AND A REEVALUATION OF LEPIDOCORDIA AND ANTROPHORA (BORAGINACEAE: EHRETIOIDEAE)
American Journal of Botany, 1990The close relationship between two monotypic genera, Lepidocordia from northern South America, and Antrophora from Central America, is reevaluated in light of numerous recent collections. It was discovered that Lepidocordia punctata
James S, Miller, Joan W, Nowicke
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Theories of the Evolution of Dioecy
1999In this chapter, I shall review theoretical models of the evolution of dioecy from hermaphroditism. I hope to show why theoretical ideas have been important, and why we cannot work in a purely ecological context, considering only fertility advantages of phenotypes, but must include genetic aspects of the breeding systems if we are not to be misled in ...
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IS DIOECY ASSOCIATED WITH FLESHY FRUIT?
American Journal of Botany, 1987The floras of the northeastern U.S. and California were analyzed with respect to the question whether dioecy is associated with fleshy fruit. These analyses control for mode of pollination, woodiness, and flower color. Weak associations between dioecy and fleshy fruit were observed, unconvincing because of the difficulty of controlling for phylogenetic
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Pollen Limitation and the Evolution of Androdioecy from Dioecy
The American Naturalist, 2004Androdioecy is an unusual breeding system in which populations consist of separate male and hermaphrodite individuals. The evolution of androdioecy is still poorly understood; however, there is evidence from several androdioecious species that the breeding system may have evolved from dioecy (males and females).
Diana E, Wolf, Naoki, Takebayashi
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Genetics of dioecy and causal sex chromosomes in plants
Journal of Genetics, 2014Dioecy (separate male and female individuals) ensures outcrossing and is more prevalent in animals than in plants. Although it is common in bryophytes and gymnosperms, only 5% of angiosperms are dioecious. In dioecious higher plants, flowers borne on male and female individuals are, respectively deficient in functional gynoecium and androecium.
Sushil, Kumar +2 more
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Transition model for the hermaphroditism-dioecy continuum in higher plants
Ecological Modelling, 2023K. Masaka, T. Takada
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Evolution of Dioecy in Flowering Plants
Annual Review of Ecology and Systematics, 1980Dioecy, characterized by the presence of distinct male and female plants, is widespread in angiosperms, being known in 37 out of Engler & Prantl's 51 orders (132). Yet botanists have paid little attention to dioecy, particu larly to selective forces underlying its evolution. Several factors have con tributed to this neglect.
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Dioecy in Plants - Is It an Important Factor for Phytochemists to Consider?
Planta Medica, 2013Plants with separate male and female flowers are termed dioecious. Dioecy is not rare, yet is a characteristic that could potentially impact the phytochemical and subsequent pharmacological properties of a species. This is a brief insight which highlights why the sex of the plant might be an important factor to consider for researchers within ...
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Dioecy in the Cerrado vegetation of Central Brazil
Flora, 1996Summary Occurrence of dioecy in Cerrado, Neotropical savanna region in Central Brazil, is analyzed here. Frequency of dioecious species and their phenological and morphological characteristics were studied for a cerrado woody community near Brasilia, and a broader comparative survey was done using phytosociological data for different cerrado areas ...
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