Results 151 to 160 of about 746 (187)

INCIDENCE OF MONOECY AND DICHOGAMY IN RELATION TO SELF-FERTILIZATION IN ANGIOSPERMS

American Journal of Botany, 1993
The evolution of many floral traits, including monoecy and dichogamy, has been attributed to selection for avoidance of self‐fertilization. If this explanation is correct, monoecy and dichogamy should be uncommon among self‐incompatible species because physiological barriers prevent self‐fertilization in such species.
Robert I Bertin
exaly   +5 more sources

Multiple sex expressions in Cimicifuga simplex: dichogamy destabilizes hermaphroditism

Biological Journal of the Linnean Society, 1987
Cimicifuga simplex (Ranunculaceae) has four types of individuals, differing in their sex expression: there are individuals with hermaphroditic, hermaphroditic and male (andromonoecious), only male, or only female flowers. Purely female individuals appear during the early part of the flowering period of the population, and males during the later part ...
Olle Pellmyr
exaly   +2 more sources

Dichogamy

, 2021
openaire   +2 more sources

Is the dichogamy ofSalvia verbenaca (Lamiaceae) an effective barrier to self-fertilization?

Plant Systematics and Evolution, 1997
Though dichogamy is generally interpreted as a means of preventing self-fertilization, the efficiency of this mechanism has been questioned. Little attention has been paid to functional aspects of male/female timing, such as variation over time in pollen germinability and in stigma receptivity.
Luis Navarro
exaly   +2 more sources

Facultative dichogamy and reproductive assurance in partially protandrous plants

Oikos, 2001
Following the pioneering work on pollination biology of the late 18th and 19th centuries, the phenomenon of dichogamy (the separation of presentation of pollen and stigmas in time) was, together with a plethora of other floral features, interpreted exclusively as an adaptive mechanism enhancing outcrossing.
Stephen A. Mallick
openaire   +2 more sources

Avoiding sexual interference: herkogamy and dichogamy in style dimorphic flowers of Narcissus broussonetii (Amaryllidaceae). [PDF]

AoB PLANTS, 2019
Spatial (herkogamy) or temporal (dichogamy) separation of sex organs are mechanisms considered to restrict self-pollination and promote outcrossing. Additionally, avoidance of self-interference is proposed to be the driving force for the evolution of ...
Daniel Barranco, Rocio Santos-Gally, Adrian C. Brennan   +2 more
exaly   +2 more sources

Synchronized dichogamy and dioecy in neotropicalLauraceae

Plant Systematics and Evolution, 1984
In 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
openaire   +1 more source

Variation in dichogamy and myophily in two dioecious Bridelia species (Phyllanthaceae)

Australian Journal of Botany, 2021
Duodichogamy and multi-cycle dichogamy are rare forms of temporal separation of staminate and pistillate reproductive functions in angiosperms. We studied the floral phenology, breeding system and pollination of Bridelia retusa (L.) A.Juss. and Bridelia moonii Thwaites, with a particular focus on the alternation of sexual phases to determine variation ...
M. A. Dias, R. M. C. S. Ratnayake
openaire   +1 more source

Dichogamie des Juncacées

Bulletin mensuel - Société botanique de Lyon, 1891
Kieffer . Dichogamie des Juncacées. In: Bulletin mensuel - Société botanique de Lyon, tome 9, bulletin 2, 1891. pp. 45-46.
openaire   +2 more sources

Long-term dichogamy of 80 pecan cultivars

Scientia Horticulturae, 1992
Abstract Data are presented on dates of pollen shed and pistil receptivity for up to 16 years for 80 pecan (Carya illinoensis (Wangenh.) C. Koch) cultivars and selections grown at Tifton, GA, USA. The data are useful for matching cultivars for optimum cross-pollination and minimum self-pollination. Pollination and pistil receptivity dates relative to
Ray E. Worley, Sue K. Dove, Ben G. Mullinix, Morris Smith   +3 more
openaire   +1 more source