exoderm

Another possibility lies in the difference between the roots mass and effective roots mass in the absorption of nutrients, what might indicate that different root masses might absorb same quantities of nutrients, or even equal masses might absorb different quantities of nutrients, since that the roots which possess exoderm present hydrophobic material, reducing the permeability to water (Holbrook, 2004).

This means that, in specific environments, these cells are capable of differentiation into the three germ layers: endoderm, mesoderm and exoderm. Three different methods are currently available to obtain hPS cells.