Results 121 to 130 of about 866 (147)
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Development of ovules in Apocynaceae and their evolution in Gentianales
Botanical Journal of the Linnean SocietyAbstract The ovule in Apocynaceae (Gentianales) is described as tenuinucellate and unitegmic. Although this type of ovule is characteristic of Asterids, their origin is widely debated due to variations within the clade, as bitegmic, bifid, or unitegmic ovules are also found in several genera.
Karen De Toni
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American Journal of Botany, 2000
Phylogenetic relationships in the Gentianales with focus on Loganiaceae sensu lato are evaluated using parsimony analyses of nucleotide sequence data from the plastid genes rbcL and ndhF. Inter‐ and intrafamilial relationships in the Gentianales, which consist of the families Apocynaceae (including Asclepiadaceae), Gelsemiaceae, Gentianaceae ...
Bengt Oxelman, Birgitta Bremer
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Phylogenetic relationships in the Gentianales with focus on Loganiaceae sensu lato are evaluated using parsimony analyses of nucleotide sequence data from the plastid genes rbcL and ndhF. Inter‐ and intrafamilial relationships in the Gentianales, which consist of the families Apocynaceae (including Asclepiadaceae), Gelsemiaceae, Gentianaceae ...
Bengt Oxelman, Birgitta Bremer
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Anatomical Structures of the VA Mycorrhiza in the Apocynaceae (Gentianales)
Botanica Acta, 1995AbstractRoots of 19 Apocynaceae species were studied anatomically with respect to their symbiosis with VAM‐fungi. In plants collected from the field, VAM‐fungi were established in the root cortex. Also, inoculations with different Glomus species on the cultured plants are very successful in the infection and colonization of the root cortex.After ...
H. Chr Weber +2 more
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Corolla tube formation in the Tubiflorae and Gentianales
The Botanical Magazine Tokyo, 1983Corolla tube formation was investigated anatomically for 22 species of the Polemoniaceae, Convolvulcaeae, Boraginaceae, Verbenaceae, Buddlejaceae. Scrophulariaceae, Gentianaceae, Menyanthaceae and Asclepiadaceae.
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New Records of Rauvolfioideae (Apocynaceae, Gentianales) for Paraíba State, Brazil
Harvard Papers in Botany, 2020This paper presents five new records of Rauvolfioideae for Paraiba state, northeastern Brazil: Aspidosperma discolor, A. melanocalyx, Macoubea guianensis, Tabernaemontana catharinensis, and T. flavicans, with the genus Macoubea being recorded for the first time in Paraiba state.
Mickaelly De Lucena Mamede +2 more
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Colleters in Antonia ovata (Loganiaceae): expanding the perspective within Gentianales
Flora: Morphology, Distribution, Functional Ecology of PlantsAristea Azevedo, Valdnéa Dalvi
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Plant Biology, 1999
Abstract: In the genus Spigelia (Spigeliaceae, Gentianales) we report for the first time the phenomenon of secondary pollen presentation. In Spigelia anthelmia, S. marilandica, and S. splen‐dens a deposition mechanism as found in some members of the Rubiaceae could be observed in living material. In Spigelia longi‐flora, S. sellowiana, and S. speciosa
Claudia Erbar, P. Leins
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Abstract: In the genus Spigelia (Spigeliaceae, Gentianales) we report for the first time the phenomenon of secondary pollen presentation. In Spigelia anthelmia, S. marilandica, and S. splen‐dens a deposition mechanism as found in some members of the Rubiaceae could be observed in living material. In Spigelia longi‐flora, S. sellowiana, and S. speciosa
Claudia Erbar, P. Leins
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Molecular Genetics and Genomics, 2008
Transposable elements are major components of plant genomes and they influence their evolution, acting as recombination hot spots, acquiring specific cell functions or becoming part of protein-coding regions. The latter is the subject of the present analysis. This study is a report on the annotation of transposable elements (TEs) in expressed sequences
Lopes, Fabricio Ramon +4 more
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Transposable elements are major components of plant genomes and they influence their evolution, acting as recombination hot spots, acquiring specific cell functions or becoming part of protein-coding regions. The latter is the subject of the present analysis. This study is a report on the annotation of transposable elements (TEs) in expressed sequences
Lopes, Fabricio Ramon +4 more
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Nordic Journal of Botany, 1983
The apocarpous gynoecia of three separate groups of higher advanced dicotyledons show postgenital fusion of their apical parts. In this fused region the pollen tube transmitting tissue of the carpels is united into a compitum, which provides advantages of a syncarpous to the apocarpous gynoecium. It is supposed that in at least some of these groups the
Peter K. Endress +2 more
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The apocarpous gynoecia of three separate groups of higher advanced dicotyledons show postgenital fusion of their apical parts. In this fused region the pollen tube transmitting tissue of the carpels is united into a compitum, which provides advantages of a syncarpous to the apocarpous gynoecium. It is supposed that in at least some of these groups the
Peter K. Endress +2 more
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Leeuwenberg, A. J. M. (ed.), 1980. Angiospermae: Ordnung Gentianales, Fam. Loganiaceae
Nordic Journal of Botany, 1981exaly +2 more sources