... and merely form a transient filament that positions the embryo within the seed. Figure 1 Pattern formation and cell specification in the early Arabidopsis embryo ( A ) Cellular patterns in eight-cell, 16-cell and globular stage embryos. Cell outlines are indicated and cell identities are marked...

... in the root's surface area in the absence of the essential but immobile minerals iron, phosphate and manganese. The resulting phenotype is characteristic of the respective condition. Growth under nutrient starvation affects the expression of genes involved in cell specification, indicating that environmental...