The'S' shaped duplex gland, the shortest among the male reproductive glands, ultrastructurally exhibits only a single cell type, characterized by the presence of multishaped rough endoplasmic reticulum, polymorphic Golgi bodies and vesicles. The frequent mode of secretion appears apocrine, with occasional merocrine and holocrine. Continuous with the height of secretory activity, the epithelia degenerates leaving only basement membrane and muscle layers.
The histology and ultrastructure of the adult testis of Spodoptera litura are studied using light microscopy and electron microscopy. Maturing spermatocytes, spermatids and their conditions within the testes are described. The continued occurrence of spermatogenesis in the adult testes has been traced and reported.
Ductus ejaculatorius duplex is the major sperm storage organ in male reproductive tract of Noctuid species. Although seminal vesicles and duplex are functionally sperm storage organs, duplex plays an important role in sperm functions on its transport from male to female. At the zenith of the reproductive function, duplex exhibits holocrine type-degeneration (secretion) concurrent with the height of secretory activity wherein the duplex secretion facilitates the transport of the spermatozoa into the female via spermatophore and contributes rich materials for spermatozoa maturity and physiological activity.
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