Autor: M. C. Risueño, Philippe Vergne, Peter M. Rogowsky, E. Le Deunff, Mireille Rougier, Jean-Louis Magnard, Pilar S. Testillano, Christian Dumas, Jezabel Domenech
Rok vydání: 2000
Předmět:
Zdroj: Plant Molecular Biology. 44:559-574
ISSN: 0167-4412
DOI: 10.1023/a:1026521506952
Popis: Reproduction in flowering plants is characterized by double fertilization and the resulting formation of both the zygotic embryo and the associated endosperm. In many species it is possible to experimentally deviate pollen development towards an embryogenic pathway. This developmental switch, referred to as microspore embryogenesis or androgenesis, leads to the formation of embryos similar to zygotic embryos. In a screen for genes specifically expressed during early androgenesis, two maize genes were isolated by mRNA differential display. Both genes represent new molecular markers expressed at a very young stage of androgenic embryogenesis. When their expression pattern was studied during normal reproductive development, both showed early endosperm-specific expression. Investigation of the cytological features of young androgenic embryos revealed that they present a partially coenocytic organization similar to that of early endosperm. These findings suggest that maize androgenesis may possibly involve both embryogenesis and the establishment of endosperm-like components.
Databáze: OpenAIRE
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