heterostyly


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heterostyly

[‚hed·ə′räst·əl·ē]
(botany)
Condition or state of flowers having unequal styles.
References in periodicals archive ?
Particularly strong in this regard are the three studies that Darwin took up in the wake of the publication of On the Origin of Species: pollination, heterostyly, and carnivorous plants (Kohn, 2005), studies that originated as investigations of plants he saw while out for a walk.
Heterostyly and pollen-tube interactions in Luculia gratissima (Rubiaceae).
Heterostyly in a tropical weed: the reproductive biology of the Turnera ulmifolia complex (Turneraceae).
eaglensis has suggested the possibility of heterostyly in the species (Grimsson et al., 2011).
It is believed that homostyly in this genus was derived from the breakdown of heterostyly as a general trend in evolution (Yasui et al., 1998).
The actual extent of geitonogamy depends on a complex array of factors, including the length of a pollinator visitation sequence, the number of flowers available on a plant, the presence of floral rewards, structural mechanisms such as heterostyly, and the extent of pollen carryover, which is the fraction of the pollen load carried over from one flower to the next in a foraging sequence (Geber 1985, de Jong et al.
Plants have evolved a variety of traits that have been interpreted as adaptations to avoid inbreeding, including separation of male and female flowers in space and time (dioecy, dichogamy), distinctive floral polymorphisms (e.g., heterostyly), and various self-incompatibility mechanisms (Darwin, 1876; Bateman, 1952; Faegri and van der Pijl, 1979; Dickinson, 1994).
Significant by their absence are fossil flowers of Decodon and Lythrum which could contribute to understanding the evolution of the specialized breeding system of heterostyly. Modern Decodon and Lythrum depend on pollinator intervention via heterostyly to promote outcrossing.
Genetic and cytological studies of compatibility in relation to heterostyly in common buckwheat, Fagopyrum sagittatum.