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LES CELLULES SECRETRICES TESTICULAIRES DU POUSSIN DE LA CAILLE JAPONAISE: DIFFERENCIATION DE LEUR ULTRASTRUCTURE ET RAPPORTS AVEC LEURS POTENTIALITES STEROIDOGENES
Author(s) -
SCHEIB DENISE
Publication year - 1973
Publication title -
development, growth and differentiation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.864
H-Index - 66
eISSN - 1440-169X
pISSN - 0012-1592
DOI - 10.1111/j.1440-169x.1973.00315.x
Subject(s) - endoplasmic reticulum , quail , ultrastructure , sertoli cell , microbiology and biotechnology , biology , lipid droplet , cytoplasm , endocrinology , medicine , spermatogenesis , anatomy
The differentiation of the Quail testis progresses slowly after hatching. The Leydig cells, not yet typical, store up lipids which indicate already their future capacities; Δ 5 –3β HSDH activity being rather low, the conversion from pregnenolone into progesterone is restricted. However, differentiation accelerates from the third week on, after the beginning of germ cell meiosis. Interstitial cells become hypertrophied and acquire the typical features of active steroidogenic cells: smooth endoplasmic reticulum develops, mitochondria swell and take on specific structures, lipids become progressively less abundant; steroid biosynthesis through Δ 5–4 pathway increases rapidly. These characteristics continue to develop. At the same time, smooth endoplasmic reticulum forms in Sertoli cells; it probably represents the morphological basis of some metabolic activities necessary for the harmonious functionning of seminiferous tubules. The ultrastructure of the Quail testis, after hatching, confirms its low steroidogenic potentialities, compared to those of the adult.