4.3. Development of brochosomes

Brochosomes do not arise in their final state. They gradually develop inside of secretory cells of the Malpighian tubules. Brochosomes originate in Golgi complexes -- the organelles that process and pack products of synthesis that are meant to be exported from the cell. Golgi complexes of the brochosome-producing cells look like irregular clusters of vesicles. Some of these vesicles contain individual brochosomes at early stages of development (B1--B2 below). Brochosomes complete their maturation (stages B3 to B4 or B6) as the secretory vacuoles move from Golgi complexes to the apical cell membrane.

Development of integumental brochosomes

See final structure

References: Rakitov 1999, 2000a

Development of rodlike egg brochosomes

References: Rakitov 2000a

Changes of secretory programs in ontogenesis

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