testa

(noun)

the seed coat

Related Terms

  • plumule
  • coleoptile
  • hypocotyl
  • radicle

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.
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