Results 11 to 20 of about 25 (25)

Aspectos da biologia da reprodução em plantas ornamentais cultivadas no Estado de São Paulo: I - Dichorisandra Thyrsiflora Mikan (Commelinaceae) Aspects of breeding system of Dichorisancha thyrsiflora Mikan

Acta Botânica Brasílica, 1987
Foram estudados os possíveis sistemas de reprodução em Dichorisandra thyrsiflora. A espécie parece ser predominantemente de fecundação cruzada, embora sem um sistema de autoincompatibilidade definido.
Yone M.S Boaventura, Luiz A.F Matthes
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Meiotic behavior during microsporogenesis of Alchornea triplinervia (Sprengel) Müller Argoviensis Comportamento meiótico durante a microsporogênese de Alchornea triplinervia (Sprengel) Müller Argoviensis

Ciência Rural, 2012
The Alchornea triplinervia specie belongs to the Euphorbiaceae family, one of the main families of the Brazilian flora. In order to contribute to a better understanding of the specie, a counting of chromosome number and the microsporogenesis analysis of ...
Sara Mataroli de Godoy, Andréia Rodrigues Alonso Pereira, Mariza Barion Romagnolo, Claudicéia Risso-Pascotto   +3 more
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Morphological markers for microspore developmental stage in maize

Brazilian Archives of Biology and Technology, 2008
The use of maize in anther culture has been limited because only few genotypes presented a high androgenetic potential. Obtaining the proper stage of microspore development at culture initiation is one of the most crucial factors for success in the ...
Ana Paula de Moraes, Fernanda Bered, Fernando Irajá Felix de Carvalho, Eliane Kaltchuk-Santos   +3 more
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Development of pollen grain in yellow passion-fruit (Passiflora edulis f. flavicarpa; Passifloraceae)

Genetics and Molecular Biology, 2000
To clarify events occurring during pollen grain formation in yellow passion-fruit (Passiflora edulis f. flavicarpa), floral buds were collected at different stages of development. After bracket, petal and sepal removal the anthers were fixed, dehydrated,
Margarete Magalhães de Souza, Telma Nair Santana Pereira   +1 more
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Anther and pollen development in some species of Poaceae (Poales)

Brazilian Journal of Biology
Anther and pollen development were studied in Olyra humilis Nees, Sucrea monophylla Soderstr, (Bambusoideae), Axonopus aureus P. Beauv., Paspalum polyphyllum Nees ex Trin. (Panicoideae), Eragrostis solida Nees, and Chloris elata Desv.
AT. Nakamura, HM. Longhi-Wagner, VL. Scatena   +2 more
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Microsporogenesis in Brachiaria bovonei (Chiov.) Robyns and B. subulifolia (Mez) Clayton (Poaceae) Microsporogênese em Brachiaria bovonei (Chiov.) Robyns e B. subulifolia (Mez) Clayton (Poaceae)

Scientia Agricola, 2009
Some African species of Brachiaria have been introduced into the Americas and became the most important forage for pastures in the tropics. New cultivars can be obtained either from direct selections from the natural existing variability in the germplasm
Claudicéia Risso-Pascotto, Maria Suely Pagliarini, Cacilda Borges do Valle   +2 more
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Meiotic arrest compromises pollen fertility in an interspecific hybrid between Brachiaria ruziziensis x Brachiaria decumbens (Poaceae: paniceae)

Brazilian Archives of Biology and Technology, 2007
Microsporogenesis was analyzed in an interspecific hybrid between an artificially tetraploidized sexual accession of Brachiaria ruziziensis (2n=4x=36) and a natural apomictic tetraploid accession of B. decumbens.
Andréa Beatriz Mendes-Bonato, Maria Suely Pagliarini, Cacilda Borges do Valle   +2 more
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Microsporogênese e etapas da ontogenia do gametófito masculino de Tabebuia ochracea (Cham.) Standley (Bignoniaceae) Microsporogenesis and the early male gametophyte development of Tabebuia ochraceae (Cham.) Standley (Bignoniaceae)

Acta Botânica Brasílica, 1996
Foram analisadas as etapas da ontogenia do gametófito masculino e da parede da antera de Tabebuia ochracea. O método de formação da parede do microsporângio é do tipo Dicotiledôneo.
Nelson S. Bittencourt Jr
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Chromosome studies on Brazilian cerrado plants

Genetics and Molecular Biology, 2000
Cerrado is the Brazilian name for the neotropical savanna, which occurs mainly in Brazilian Central Plateau, composed of herbaceous-subshrubby and shrubby-arboreal floras, both of which are heliophilous, highly diverse and regionally differentiated ...
Eliana Regina Forni-Martins, Fernando Roberto Martins   +1 more
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Tolerância de genótipos de arroz irrigado submetidos a estresse por baixas temperaturas na fase reprodutiva

Agropecuária Catarinense, 2017
Resumo: A microsporogênese é o estágio reprodutivo mais afetado pela ocorrência de baixas temperaturas. Este estudo teve como objetivo analisar os efeitos da ocorrência de baixas temperaturas durante o estágio reprodutivo em linhagens promissoras de ...
Diane Simon Rozzetto, Rubens Marschalek, Henri Stuker, Juliana Vieira Raimondi, Domingos Sávio Eberhardt   +4 more
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