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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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Evolution towards dioecy in heterostylous populations
Plant Systematics and Evolution, 1979The effective gender of a plant is defined as the proportion of the plant's genes that are transmitted through pollen (its maleness) or through ovules (its femaleness). Formulae are derived that enable the average effective gender of the morphs of a heterostylous population and the gender of individual plants to be estimated.
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Dioecy, hermaphrodites and pathogen load in plants
Oikos, 2011Sex‐specific investment in pathogen resistance and immunity has been widely reported in animals and to a much lesser degree in plants. Here, we investigated the incidence of fungal pathogens in dioecious versus hermaphroditic plant species. We found that direct studies on differences between males and females in disease resistance or pathogen incidence
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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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Some aspects of dioecy inOcotea (Lauraceae)
Plant Systematics and Evolution, 1986The evolution of dioecy inLauraceae cannot be attributed to selection for outbreeding but must have other reasons. Therefore it is interesting to note that inOcotea there seems to be a correlation between mode of reproduction and geographical distribution.
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DIOECY IN BAUHINIA RESULTING FROM ORGAN SUPPRESSION
American Journal of Botany, 1988Bauhinia malabarica and B. divaricata have both been reported to have dimorphic flowers; floral development of these species has been investigated and compared using SEM. B. malabarica is subdioecious, with three types of flowers: perfect, staminate, and carpellate. Individual trees usually have only one type of flower.
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Some Functions of Dioecy in Seed Plants
The American Naturalist, 1984Comments are made on recent publications that emphasize that dioecy in seed plants can be more than just an outcrossing mechanism. It is accepted that "sexual selection" may play an important role in the evolution of dioecy. Circumstantial evidence is presented that when habitat conditions favor outcrossing easily evolved dioecy may be selected ...
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DIOECY IN NORTH AMERICAN CACTACEAE: A REVIEW
1985(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
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