Search results for "Polyembryony"

showing 3 items of 3 documents

Embryo development in Cocos nucifera L.: A critical contribution to a general understanding of palm embryogenesis

1979

InCocos (and probably in all other palms) the embryogenesis shows a number of primitive characters, such as differentiation of the embryo proper from one cell of the pluricellular proembryo, origin of the single cotyledon from a position lateral to the terminal stem tip, and a tendency to cleavage polyembryony.

Cocos nuciferaEmbryologyBotanyEmbryogenesisPolyembryonyfood and beveragesEmbryoPlant ScienceProembryoBiologyCleavage (embryo)PalmEcology Evolution Behavior and SystematicsPlant Systematics and Evolution
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Micropropagation of Citrus spp. by Organogenesis and Somatic Embryogenesis.

2013

Citrus spp., the largest fruit crops produced worldwide, are usually asexually propagated by cuttings or grafting onto seedling rootstocks. Most of Citrus genotypes are characterized by polyembryony due to the occurrence of adventive nucellar embryos, which lead to the production of true-to-type plants by seed germination. Tissue culture and micropropagation, in particular, are valuable alternatives to traditional propagation to obtain a high number of uniform and healthy plants in a short time and in a small space. Moreover, in vitro propagation provides a rapid system to multiply the progeny obtained by breeding programs, allows the use of monoembryonic and seedless genotypes as rootstock…

GermplasmSomatic embryogenesisfungiPolyembryonyfood and beveragesOrganogenesisBiologySettore AGR/03 - Arboricoltura Generale E Coltivazioni ArboreeCuttingMicropropagationBotanyMicropropagationCitrus spp.OrganogenesisSomatic Embryogenesis.CultivarRootstock
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In vitro rescue of zygotic embryos of sour orange, Citrus aurantium L., and their detection based on RFLP analysis

1998

Embryo development in vivo has been studied in four Citrus aurantium L. polyembryonic genotypes. Seeds were collected 65, 85, 105, 125 and 220 days after pollination (DAP). None of the immature seeds harvested 65 and 85 DAP contained visible embryos. A single embryo at a more advanced developmental stage was observed in the central position at the micropylar apex of the embryo sac in about 74% of seeds harvested at 105 DAP, while at 125 and 220 DAP the majority of seeds had two or more embryos at the same developmental stage crowded together. Restriction fragment length polymorphism (RFLP) analysis of low- and high-copy-number nuclear DNA was used to distinguish zygotic from nucellar seedli…

animal structuresPolyembryonyPlant ScienceRepetitive DNANucellar embryonyBiologychemistry.chemical_compoundMurashige and Skoog mediumBotanyGeneticsEmbryo cultureGibberellic acidCitrus aurantiumNucellar embryonyMolecular markersEmbryo cultureEmbryoEmbryo rescueHorticulturechemistryGerminationDNA polymorphismembryonic structuresGrowth regulatorsAgronomy and Crop ScienceApomixis
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