testa

Examples of testa in the following topics:

• Development of the Seed

  • In dicots, the seed coat is further divided into an outer coat, known as the testa, and inner coat, known as the tegmen.
  • The seed coat forms from the two integuments or outer layers of cells of the ovule, which derive from tissue from the mother plant: the inner integument forms the tegmen and the outer forms the testa.
  • When the seed coat forms from only one layer, it is also called the testa, though not all such testae are homologous from one species to the next.
  • In monocot seeds, the testa and tegmen of the seed coat are fused.