منابع مشابه
Zygotic embryogenesis versus somatic embryogenesis
This review will summarize molecular and genetic analyses aimed at identifying the mechanisms underlying the sequence of events during plant zygotic embryogenesis. These events are being studied in parallel with the histological and morphological analyses of somatic embryogenesis. The strength and limitations of somatic embryogenesis as a model system will be discussed briefly. The formation of...
متن کاملHuman Embryogenesis
The building of the human embryo is a biological process of transcendent complexity. It fails at least three times as often as it succeeds. It takes about six weeks for a ‘normal’ version of the process to construct a fetus containing all of the differentiated cell types necessary, in the correct numbers and locations, to form all of the tissue and organ systems necessary to become a living, br...
متن کاملSomatic Embryogenesis
Somatic embryogenesis is an asexual form of plant propagation in nature that mimics many of the events of sexual reproduction. Also, this process may be reproduced artificially by the manipulation of tissues and cells in vitro. Some of the most important factors for a successful plant regeneration are the culture medium and environmental incubation conditions. In vitro somatic embryogenesis is ...
متن کاملCotton Embryogenesis
The formation of the zygote in cotton is accompanied by marked changes in the number and aggregation of the ribosomes. The zygote is formed approximately 14 hr after pollination but does not divide for some 56-60 hr. Electron microscope studies of the zygote during this period reveal a series of changes in the size and distribution of polysomes which may provide information on this important st...
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ژورنال
عنوان ژورنال: Nature Reviews Genetics
سال: 2019
ISSN: 1471-0056,1471-0064
DOI: 10.1038/s41576-019-0141-3