Results 151 to 160 of about 1,432 (174)

Performance, Effectiveness, and Efficiency of Honeybees as Pollinators of Coffea arabica (Gentianales, Rubiaceae)

Neotropical Entomology, 2020
Studies in crop plants analyzing floral biology in conjunction with effectiveness and efficiency of pollinators on pollen transfer and fruit formation are not common, although they are essential to provide better management actions. On this base, we selected a farm in Bahia, Brazil, to study pollination on coffee plants (Coffea arabica L ...
J Hipólito, D O Nunes, C Angel-Coca, T Mahlmann, L Galetto, B F Viana   +5 more
openaire   +3 more sources

Development of Ovules in Apocynaceae and Their Evolution in Gentianales

Botanical Journal of the Linnean Society
Abstract 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
exaly   +2 more sources

Anatomical Structures of the VA Mycorrhiza in the Apocynaceae (Gentianales)

Botanica Acta, 1995
AbstractRoots 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, A. Klahr, M. Marron‐Heimbuch   +2 more
openaire   +1 more source

Corolla tube formation in the Tubiflorae and Gentianales

The Botanical Magazine Tokyo, 1983
Corolla tube formation was investigated anatomically for 22 species of the Polemoniaceae, Convolvulcaeae, Boraginaceae, Verbenaceae, Buddlejaceae. Scrophulariaceae, Gentianaceae, Menyanthaceae and Asclepiadaceae.
openaire   +1 more source

New Records of Rauvolfioideae (Apocynaceae, Gentianales) for Paraíba State, Brazil

Harvard Papers in Botany, 2020
This 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, Luan Pedro-Silva, José Iranildo Miranda De Melo   +2 more
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Colleters in Antonia ovata (Loganiaceae): Expanding the Perspective Within Gentianales

Flora: Morphology, Distribution, Functional Ecology of Plants
Aristéa Alves Azevedo, Valdnéa Casagrande Dalvi, João Santana-Tomaz   +2 more
exaly   +2 more sources

Secondary Pollen Presentation and a Curious Rupture of the Style in Spigelia (Spigeliaceae, Gentianales)

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
openaire   +1 more source

Endomycorrhizas in the Gentianales: Structures and Evolution of the Vesicular- Arbuscular Mycorrhiza (VAM)

2003
In 1885, Frank created the term mycorrhiza [1]. Therefore, the symbiotic associations between flowering plants and fungi have been known for more than a century. Vesicular-arbuscular mycorrhiza (VAM) is the most common symbiosis in flowering plants, where almost all show VAM at some stage in their development. Although the roots of the flowering plants
openaire   +1 more source

Systematic importance of orbicule diversity in Gentianales

Grana, 2002
Stefan Vinckier, Erik Smets
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Flora of Australia Volume 28 Gentianales

Kew Bulletin, 1998
D. J. Goyder, Anthony E. Orchard, Annette Wilson   +2 more
openaire   +1 more source