Results 201 to 210 of about 3,609 (241)
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A Discussion of Transitional Dioecy in Operculicarya
Cactus and Succulent Journal, 2019Our Operculicarya journey began twenty years ago with a single female O. decaryi, lovingly referred to as Big Mama, and a stable of male plants. Led by Joe Stead’s passion for plant propagation, we embarked on a program of observation and documentation ...
Daniel Houston, Joseph Stead
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Hypotheses for the evolution of dioecy in seed plants
Trends in Ecology & Evolution, 1990Over the last decade, new hypotheses have been proposed for the evolution of dioecy in plants. Most of the selective mechanisms invoked have been suggested and supported by phylogenetic correlations. Here we review (1) the validity of the correlations (especially in light of recent critiques of the comparative method), and (2) the conformity of the ...
J D, Thomson, J, Brunet
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American-Eurasian journal of botany
PREMISE Numerous studies have found a positive association between dioecy and polyploidy; however, this association presents a theoretical conflict: While polyploids are predicted to benefit from self-reproduction for successful establishment, dioecious ...
Wilhelm H. A. Osterman +5 more
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PREMISE Numerous studies have found a positive association between dioecy and polyploidy; however, this association presents a theoretical conflict: While polyploids are predicted to benefit from self-reproduction for successful establishment, dioecious ...
Wilhelm H. A. Osterman +5 more
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Synchronized dichogamy and dioecy in neotropicalLauraceae
Plant Systematics and Evolution, 1984In hermaphrodite neotropicalLauraceae a highly evolved dichogamous system is present which represents a kind of temporal dioecy. This system involves the existence of two flower morphs which are characterized by reciprocal phases of receptivity of the stigmas and pollen release.
Klaus Kubitzki, Holger Kurz
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Evolution of Dioecy in Saurauia (Dilleniaceae)
Annals of the Missouri Botanical Garden, 1984Saurauia veraguensis in Costa Rica is morphologically androdioecious but functionally dioecious. Both staminate and pistillate flowers bear pollen. The pollen in the staminate flowers is tricolporate, and smaller than the inaperturate pollen borne by the pistillate flowers.
W. A. Haber, K. S. Bawa
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Dioecy inMikania (Compositae:Eupatorieae)
Plant Systematics and Evolution, 1991For the first time dioecy inMikania and in the tribeEupatorieae is described and discussed. The condition is known only in members of theMikania swartziana Griseb. complex, a group of eight species, all endemic to the Greater Antillean Islands of Cuba, Hispaniola, and Jamaica.
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Ecological research, 2019
Dioecy is a rather rare sexual expression system guarantees outcrossing to avoid the deleterious effects of inbreeding. The incidence of dioecy varied among local floras and suggested inclining to tropical and oceanic environments, but its eco-correlates
Huan‐Yu Lin +3 more
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Dioecy is a rather rare sexual expression system guarantees outcrossing to avoid the deleterious effects of inbreeding. The incidence of dioecy varied among local floras and suggested inclining to tropical and oceanic environments, but its eco-correlates
Huan‐Yu Lin +3 more
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Molecular Phylogenetics and Evolution, 2018
Dioecy is a rare sexual system that is thought to represent an "evolutionary dead end". While many studies have addressed the evolution of dioecy and/or its relationship with the evolution of the woody habit, few have explored the relationship between ...
Tingting Duan +8 more
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Dioecy is a rare sexual system that is thought to represent an "evolutionary dead end". While many studies have addressed the evolution of dioecy and/or its relationship with the evolution of the woody habit, few have explored the relationship between ...
Tingting Duan +8 more
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Dioecy in Cactaceae: Species with Unisexual Flowers
Cactus and Succulent JournalMichael A. Wisnev
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Cryptic dioecy in Mammea (Clusiaceae)
Plant Systematics and Evolution, 2004The flowers of Mammea (Clusiaceae) have been reported to be androdioecious, a rare condition in the angiosperms. Pollen from eight taxa from most of the geographic range of the genus was examined to clarify the type of flowers, and thus the breeding system, of the genus. In six of these taxa pollen from both morphologically perfect and male flowers was
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