Fig. 1From: Transcriptome profiling of laser-captured germ cells and functional characterization of zbtb40 during 17alpha-methyltestosterone-induced spermatogenesis in orange-spotted grouper (Epinephelus coioides)Gonadal histological morphology after MT treatment. a, b, d and f Histology of gonads in control fish. c, e and g Histology of gonads after MT implantation. PO, primary-growth stage oocyte; PVO, the cortical-alveolus stage oocyte; SG, spermatogonia; SC, spermatocyte; ST, spermatid; and SZ, spermatozoa. Scale bars = 50 umBack to article page