During somatic embryogenesis in Arabidopsis thaliana, cell clusters gave rise to a functional multicellular organism. As in many higher multicellular systems, essential architectural features, such as body axes and major tissue layers were established early in somatic embryogenesis and served as a positional framework for subsequent pattern elaboration. The apical-basal axis and the radial pattern of tissues wrapped around it were already anatomically recognizable in very young embryos of approximately a hundred cells. This early axial pattern seemed to provide a coordinate system for the embryonic initiation of shoot and root. The genetic programs operating in the early embryo organized functional cell patterns rapidly and reproducibly from minimal cell numbers.
Abstract
1. Introduction
2. Materials and Methods
3. Results and Discussion
4. References
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