Zygotic Embryo
Mostrando 13-24 de 88 artigos, teses e dissertações.
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13. Embriogênese somática em macaúba: indução, regeneração e caracterização anatômica / Somatic embryogenesis in macauba: induction, regeneration and anatomical characterization
Among oleaginous plants that could be used to produce biodiesel, macauba (Acrocomia aculeata (Jacq.) Lodd. ex Martius) is known as a highly productive and semi-arid adapted palm. However, this species shows some problems regarding to its propagation and somatic embryogenesis can be an alternative. The aim was to contribute to the development of macauba somat
Publicado em: 2007
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14. The maternal JAK/STAT pathway of Drosophila regulates embryonic dorsal-ventral patterning
Activation of NFkappaB plays a pivotal role in many cellular processes such as inflammation, proliferation and apoptosis. In Drosophila, nuclear translocation of the NFkappaB-related transcription factor Dorsal is spatially regulated in order to subdivide the embryo into three primary dorsal-ventral (DV) domains: the ventral presumptive mesoderm, the lateral
Brazilian Journal of Medical and Biological Research. Publicado em: 2004-12
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15. AtchitIV gene expression is stimulated under abiotic stresses and is spatially and temporally regulated during embryo development
The expression of AtchitIV gene was analysed in Arabidopsis plants submitted to abiotic stresses. Transcript accumulation was detected in leaves in response to UV light exposure, exogenous salicylic acid administration and wounding. Transgenic Arabidopsis plants carrying AtchitIV promoter::gus fusion also showed differential expression of the reporter gene i
Genetics and Molecular Biology. Publicado em: 2004
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16. Identificação e caracterização de proteinas e genes expressos diferencialmente durante o desenvolvimento do embrião zigotico de Araucaria angustifolia
Arauearia angustifolia, the only native conifer in Brazil, covered the States of Paraná (40%), Santa Catarina (31 %) and Rio Grande do Sul (25%). Sparse patches were also found in areas with elevated altitudes, in the States of São Paulo (3%), Minas Gerais and Rio de Janeiro (1 %). The A. angustifolia wood was, for a long time, one of the most important ex
Publicado em: 2002
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17. O genero Dahlstedtia Malme : embriologia, sistema reprodutivo e biossistematica
Flowers, fruits and seed abortion was studied in two Brazilian species: Dahlstedtia pinnata e D. pentaphy/la (Leguminosae, Papilionoideae). Such a study was developed through investigations of: 1. floral development, microsporogenesis, ovule and early seed development following open, self- and cross-pollination, in order to compare the results to other papil
Publicado em: 2001
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18. Zygotic Expression and Activity of the Drosophila Toll Gene, a Gene Required Maternally for Embryonic Dorsal-Ventral Pattern Formation
Maternal expression of the Toll gene is required for the production and the correct spatial organization of all lateral and ventral structures of the Drosophila embryo. We show here that the Toll gene is transcribed zygotically in the embryo and that zygotic expression is important for the viability of the larva. Both genetic and molecular data indicate that
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19. Timing of the Maternal-to-Zygotic Transition during Early Seed Development in MaizeW⃞
In animals, early embryonic development is largely dependent on maternal transcripts synthesized during gametogenesis. Recent data in plants also suggest maternal control over early seed development, but the actual timing of zygotic genome activation is unclear. Here, we analyzed the timing of the maternal-to-zygotic transition during early Zea mays seed dev
American Society of Plant Biologists.
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20. Zygotic genes that mediate torso receptor tyrosine kinase functions in the Drosophila melanogaster embryo.
The developmental signal that specifies the fates of cells at the anterior and posterior termini of the Drosophila embryo is transmitted by the torso receptor tyrosine kinase. This paper presents the results of a genetic interaction test for zygotic loci that act downstream of torso in the terminal genetic hierarchy. Tests of 26 zygotic mutants with defects
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21. Protein Phosphorylation during Coconut Zygotic Embryo Development1
Evidence was obtained on the occurrence of protein threonine, serine, and tyrosine (Tyr) kinases in developing coconut (Cocos nucifera L.) zygotic embryos, based on in vitro phosphorylation of proteins in the presence of [γ-32P]ATP, alkaline treatment, and thin-layer chromatography analysis, which showed the presence of [32P]phosphoserine, [32P]phosph
American Society of Plant Physiologists.
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22. Transcription-dependent induction of G1 phase during the zebra fish midblastula transition.
The early development of the zebra fish (Danio rerio) embryo is characterized by a series of rapid and synchronous cell cycles with no detectable transcription. This period is followed by the midblastula transition (MBT), during which the cell cycle gradually lengthens, cell synchrony is lost, and zygotic transcription is initially detected. In this work, we
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23. bowel, an odd-skipped homolog, functions in the terminal pathway during Drosophila embryogenesis.
The terminal genes of Drosophila specify non-segmented regions of the larval body that are derived from the anterior and posterior regions of the early embryo. Terminal class genes include both maternal-effect loci (typified by the receptor tyrosine kinase torso) that encode components of a signal transduction cascade and zygotic genes (e.g. tailless and huc
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24. Maintenance of genomic imprinting at the Arabidopsis medea locus requires zygotic DDM1 activity
In higher plants, seed development requires maternal gene activity in the haploid (gametophytic) as well as diploid (sporophytic) tissues of the developing ovule. The Arabidopsis thaliana gene MEDEA (MEA) encodes a SET-domain protein of the Polycomb group that regulates cell proliferation by exerting a gametophytic maternal control during seed development. S
Cold Spring Harbor Laboratory Press.