Results 41 to 50 of about 335 (142)
Floral development at multiple spatial scales in Polygonum jucundum (Polygonaceae), a distylous species with broadly open flowers. [PDF]
PLoS ONE, 2014 Distyly, a special polymorph, has evolved in many groups of angiosperms and has attracted attention since Darwin's time. Development studies on distylous taxa have helped us to understand the evolutionary process of this polymorph, but most of these ...
Lan-Jie Huang +2 more
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Acta Botânica Brasílica, 2004 Psychotria L. (Rubiaceae) é o gênero com mais espécies heterostílicas dentre as Angiospermas. O objetivo deste trabalho é descrever a biologia floral, fenologia, o sistema reprodutivo e os polinizadores de Psychotria poeppigiana Müll. Arg.
Christiano Peres Coelho +1 more
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Correlation between distyly and ploidy level in Damnacanthus (Rubiaceae) [PDF]
American Journal of Botany, 2004 Somatic chromosomes were observed in 661 individuals of 14 taxa, nine species and five varieties, of Damnacanthus (Rubiaceae). Chromosome numbers are reported for the first time for 13 taxa. Diploid (2n = 22) and tetraploid (2n = 44) counts were obtained. Distyly is reported for the first time for four species, D. angustifolius, D. henryi, D. labordei,
Akiyo, Naiki, Hidetoshi, Nagamasu
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Botanical Sciences, 2018 Background: Heterostyly is a genetic polymorphism characterized by a system of sporophyte auto-incompatibility in which the plant populations show two (distyly) or three (tristyly) floral morphs.
Luis Antonio Salinas-Esquivel +2 more
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FlowerMate: Multidimensional reciprocity and inaccuracy indices for style-polymorphic plant populations. [PDF]
Appl Plant SciAbstract Premise Heterostyly in plants promotes pollen transfer between floral morphs, because female and male sex organs are located at roughly reciprocal heights within the flowers of each morph. Reciprocity indices, which assess the one‐dimensional variation in the height of sex organs, are used to define the phenotypic structure of heterostyly in ...
Simón-Porcar V +3 more
europepmc +2 more sources
A loss-of-alleles model for the evolution of distyly [PDF]
Heredity, 1982 Distyly is characterized by a diallelic incompatibility system. Crowe (1964) hypothesized that this has arisen by a loss of alleles from multiallelic systems. I have examined a mechanism for such a loss in a simulated population with sporophytic incompatibility and four alleles at the incompatibility locus.
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Acta Botânica Brasílica, 2007 (Floral biology and breeding system oi Psychotria tenuinervis Muell. Arg. (Rubiaceae) in the Atlantic rain forest, SE Brazil). The aim of this study was to investigate pollination biology, floral morphometry, morph ratio and breeding system oiPsychotria ...
Carolina Bernucci Virillo +3 more
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The genetics of distyly and homostyly in Turners ulmifolia L. (Turneraceae) [PDF]
Heredity, 1985 Turnera ulmifolia L. is a polymorphic complex of diploid, tetraploid and hexaploid varieties. Diploids and tetraploids are distylous and hexaploids homostylous. A controlled crossing programme demonstrated that in diploids distyly is controlled by a single locus with two alleles. Long-styled plants are ss and short-styled plants can be either Ss or SS.
Joel S Shore, Spencer C H Barrett
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BMC Plant Biology, 2022 Background Floral morphs are characterized differentiations in reciprocal positions of sexual organs and ancillary floral traits in heterostylous plants.
Xiaoyue Wang +6 more
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Evolutionary consequences of repeated loss of distyly in Linum
Abstract The breakdown of distyly, a polymorphism that promotes disassortative pollination between two floral morphs, is often assumed to increase self-fertilization, reducing the efficacy of selection and challenging long-term species persistence. We tested whether repeated losses of distyly Linum
Postel Z +8 more
europepmc +2 more sources