Cryptic dioecy
WebFeb 2, 2011 · Given the evident role of stamens in female flowers in A. polygama reproduction, we discuss why cryptic dioecy is a rare phenomenon.Key words: … Webeither poor (which is called cryptic or leaky dioecy, Charlesworth, 1984) or zero and the species is dioe-cious. Only four animal genera and eight plant species have been …
Cryptic dioecy
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WebJan 7, 2024 · The development of unisexual flowers has been described in a large number of taxa, sampling the diversity of floral phenotypes and sexual systems observed in extant angiosperms, in studies focusing on floral ontogeny, on the evo-devo of unisexuality, or on the genetic and chromosomal bases of unisexuality. We review here such developmental ... http://flora.huh.harvard.edu/china/novon/annalsmbg-96-04-672.pdf
WebSep 1, 1999 · There is evidence from other island groups that cryptic dioecy may be a common feature of dioecy on oceanic islands (e.g. Humeau et al., 1999) and thus worth comparative study, particularly in... WebSep 5, 2024 · Introduction. Androdioecy is a rare (<0.005%), but phylogenetically important, breeding system in angiosperm species [1, 2] that is characterized by populations containing both male and hermaphroditic individuals.Some morphological androdioecy has, however, been shown to be cryptic dioecy [3, 4] with a sex ratio of 1:1 as the hermaphrodites …
WebJul 19, 2010 · Cryptic dioecy is widely reported in flowering plants. However, in most instances it is not associated with transitions from heterostyly to dioecy (Bawa, 1980; Haber and Bawa, 1984; Kevan and Lack, 1985; Kawakubo, 1990; Mayer and Charlesworth, 1991; Kato and Nagamasu, 1995; Renner and Ricklefs, 1995; Aranha et al., 2009). WebWe show that dioecy is associated with increased genetic diversity and a higher selection efficacy both against deleterious and for beneficial mutations while controlling for differences in population size. ... and in the Carpathians. Several contact zones were identified. Silene nutans consists of a cryptic assemblage of genetically distinct ...
WebDec 30, 2009 · 30 December 2009 Cryptic Dioecy in Nyssa Yunnanensis (Nyssaceae), A Critically Endangered Species from Tropical Eastern Asia Bao-Ling Sun , Chang-Qin …
WebLes fleurs femelles de certaines espèces dioïques développent des étamines avec du pollen stérile, un système sexuel connu comme dioïsme cryptique. Le fait que les étamines des fleurs femelles attirent les pollinisateurs pour assurer la production de graines, serait une hypothèse convaincante pour expliquer ce phénomène. trypanosome antigenic variationWebFor these cases, cryptic dioecy is explained by pollinator foraging behavior and not sexual allocation theory. Pollen as a nutritional reward to foraging bees is largely … phillip island digital domainWebNov 26, 2008 · Abstract. Pollen morphology of ten Brazilian species within the South American clade (ca. 20 species) of Symplocos section Barberina (Symplocaceae) was … trypanosoma rhodesiense life cycleWebEvolution of cryptic dioecy in Callicarpa(Verbenaceae) on the Bonin Islands By Nobumitsu Kawakubo Edited by Tod F. Stuessy, Universität Wien, Austria,Mikio Ono Book: … trypanothione synthetaseWebOct 1, 1999 · All eight species show cryptic dioecy. Five species show strict dioecy and three species show leaky dioecy due to the presence of male trees that set fruit. Species … trypanothione disulfideWebMar 4, 2015 · The higher occurrence of dioecy in young successional areas is likely due to a higher relative seed fitness of dioecious species in more stressful conditions or by an evolutionary-driven association between dioecy and colonization ability, as predicted by theoretical studies. Synthesis. tryp app mexicoWebSeveral new cases of cryptic dioecy have recently been studied. They may give information about the minimal requirements for the evolution … In some dioecious plant … phillip island district cricket club