色素体由许多充满了颜料的微小单元组成。

C consist of tiny sacks filled with color dye.

要形成黑色素，需要有酪氨酸、酪氨酸酶、氧及黑色素体。

Must form the melanin, needs to have the tyrosine, the tyrosinase, the oxygen and the melanin body.

胞质中有3—5颗或更多、多角形至圆形，较大的色素体。

Their rough endoplasmic reticula were few with 3-5 or even more round or pigment granules in cytoplasm.