Results 31 to 40 of about 3,609 (241)
Anais da Academia Brasileira de Ciências, 2022 we conducted anatomical analysis of anthers with the aim to establish the differences in the development pattern of microsporophytes and microgametophytes between perfect and imperfect flowers in the tribe Gardenieae (Rubiaceae). The species studied were:
M. D. Judkevich +2 more
semanticscholar +1 more source
Molecular and genetic mechanisms conferring dissolution of dioecy in Diospyros oleifera Cheng
bioRxiv, 2022 Dioecy, a sexual system of single-sex (gynoecious/androecious) individuals, is rare in flowering plants. This rarity may be a result of the frequent transition from dioecy into systems with co-sex individuals.
Peng Sun +14 more
semanticscholar +1 more source
Plants, 2023 Solanum section Leptostemonum is an ideal lineage to test the theoretical framework regarding proposed evolutionary benefits of outcrossing sexual systems in comparison to cosexuality.
Jason T. Cantley +5 more
doaj +1 more source
Plants, 2021 Cannabis sativa (2n = 2x = 20) is a popular species belonging to the Cannabaceae family. Despite its use for medical, recreational, and industrial purposes as well as its long history, the genetic research on this species is in its infancy due to the ...
Marcel Borin +6 more
semanticscholar +1 more source
Revision of Tinospora (Menispermaceae - Chasmantheroideae - Burasaieae) in Singapore
European Journal of Taxonomy, 2023 The lianescent genus Tinospora Miers in Singapore is revised. Four species are recognised, two of which are newly described. Tinospora krispura I.M.Turner sp. nov. is known from Christmas Island and Singapore. Tinospora singapura I.M.Turner sp. nov.
I.M. Turner
doaj +1 more source
Cryptic dioecy and leaky dioecy in endemic species of Dombeya (Sterculiaceae) on La Re´union [PDF]
American Journal of Botany, 1999 The high frequency of dioecy on oceanic islands such as Hawaii and New Zealand has attracted a great deal of attention from plant evolutionary biologists. One reason suggested for the high prevalence of dioecy on oceanic islands is that taxa considered truly dioecious may have occasional hermaphrodite flowers, i.e., show leaky dioecy. In this study, we
L, Humeau, T, Pailler, J D, Thompson
openaire +2 more sources
Dioecy and the evolution of sex ratios in ants [PDF]
Proceedings of the Royal Society B: Biological Sciences, 2009 Split sex ratios, when some colonies produce only male and others only female reproductives, is a common feature of social insects, especially ants. The most widely accepted explanation for split sex ratios was proposed by Boomsma and Grafen, and is driven by conflicts of interest among colonies that vary in relatedness.
Diane C, Wiernasz, Blaine J, Cole
openaire +2 more sources
PLoS Genetics, 2020 Most angiosperms bear hermaphroditic flowers, but a few species have evolved outcrossing strategies, such as dioecy, the presence of separate male and female individuals. We previously investigated the mechanisms underlying dioecy in diploid persimmon (D.
Takashi Akagi +6 more
doaj +1 more source
European Journal of Taxonomy, 2023 We present a preliminary discussion about cauliflory, sexual dimorphism and biogeographic patterns in Drypetes Vahl (Putranjivaceae Endl.), focused on Africa.
Alejandro Quintanar +3 more
doaj +1 more source
Pollen and anther development malfunction in distylous flowers of Palicourea padifolia (Rubiaceae)
Botanical Sciences, 2020 Background: Heterostyly is a genetic polymorphism in which flowers differ between individual plants of a species in heights at which stamens and style are reciprocally positioned.
Juan Francisco Ornelas +2 more
doaj +1 more source