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Análises ontogenéticas em sementes de euphorbiaceae
(2014-01-01)
Euphorbia cotinifolia and Jatropha gossypiifolia belong to Euphorbiaceae, and to the respective subfamilies Acalyphoideae, Euphorbioideae and Crotonoideae. Information on morphology and seminal development of Euphorbiaceae ...
COMPARATIVE OVULE ONTOGENY IN SOME MEMBERS OF THE TABEBUIA ALLIANCE (BIGNONIACEAE)
(Univ Chicago Press, 2016-07-01)
Premise of research. Recent phylogenetic studies placed nearly all Neotropical arboreal and shrubby species of the Bignoniaceae (excluding Jacaranda) in the Tabebuia alliance, a clade that includes all of the woody species ...
Nucellar beak structure and pollen tube growth in Cucurbitaceae
(Elsevier Gmbh, 2014-05)
The nucellar beak is a proboscis-like outgrowth of the nucellus at the micropylar end, being the obliged path for the pollen tube entering the ovule. Among the few angiosperm families with nucellar beak, Cucurbitaceae is ...
Patrones distintivos de deposición de calosa proveen evidencia temprana de aborto de óvulos en el arbusto andromonoico Caesalpinia gilliesiiDistinctive patterns of callose deposition provide an early sign of ovule abortion in the andromonoecious shrub Caesalpinia gilliesii
(Sociedad Argentina de Botánica, 2009-07)
Ovule abortion may lead to the partial or complete reduction of the number of functional ovules in the ovary and then is the primary factor that determines the sexual expression of the plant. In different species, ovule ...
Seed development in Malpighiaceae species with an emphasis on the relationships between nutritive tissues
(Elsevier B.V., 2014-01-01)
Malpighiaceae ovules have a well-developed nucellus; previous observations indicate that during seed development, the endosperm does not proliferate, thus, remaining scarce. This study aimed at identifying the nutritive ...
Morphology and histochemistry of coalified Trigonocarpus grandis (Sydney Coalfield, Canada): Implications for the preservation, chemotaxonomy, and evolution of Carboniferous medullosalean ovules
(Elsevier Science, 2013-12-13)
From seven of the eight studied coalified ovules (Trigonocarpus grandis: Sydney Coalfield, Canada) sufficient material could be macerated (Schulze's process) for histochemical investigation. This encompasses histological ...
Desenvolvimento de óvulo, fruto e semente de espécies de Poaceae (Poales)
(Sociedade Botânica de São Paulo, 2009-03-01)
O desenvolvimento de óvulo, fruto e semente de Olyra humilis Nees e Sucrea monophylla Soderstr. (Bambusoideae), Axonopus aureus P. Beauv. e Paspalum polyphyllum Nees ex Trin. (Panicoideae), Chloris elata Desv. e Eragrostis ...
Desenvolvimento de óvulo, fruto e semente de espécies de Poaceae (Poales)
(Sociedade Botânica de São Paulo, 2009-03-01)
O desenvolvimento de óvulo, fruto e semente de Olyra humilis Nees e Sucrea monophylla Soderstr. (Bambusoideae), Axonopus aureus P. Beauv. e Paspalum polyphyllum Nees ex Trin. (Panicoideae), Chloris elata Desv. e Eragrostis ...
Floral development and anatomy of pistillate flowers of lophophytum (balanophoraceae), with special reference to the embryo sac inversion
(Elsevier, 2016-03)
The extreme reduction of flowers in the Balanophoraceae has generated few and incomplete studies with scattered and often contradictory results with respect to embryology. Using light and scanning microscopy, gynoecium, ...