Figure 1 | Scientific Reports

Figure 1

From: Transcriptome Dynamics During Turbot Spermatogenesis Predicting the Potential Key Genes Regulating Male Germ Cell Proliferation and Maturation

Figure 1

Histological observation of testis at different stages. At stage II (MSII), the major spermatogenic cells were spermatogonium and primary spermatocyte while spermatozoa and spermatid were not found. At stage III, spermatogonia reduced and spermatocyte increased compared to MSII. This is the initiation stage of the annual breeding cycle. Stage III–IV of the testis is the transitional phase. Stage IV is the spermiogenesis stage and there was an increase in the proportion of spermatid. Stage V is the spawning phase and spermatozoa account for the principal parts. Stage VI is testis recession phase, wherein primary spermatocytes were the major cell type. a,b: MSII, e,f: MSIII, i,j: MSIII-MSIV, n,o: MSIV, r,s: MSV, v,w: MSVI. sg, spermatogonium; ps, primary spermatocyte; ss, secondary spermatocyte; st, spermatid; sz, spermatozoon. Scale bars: a,e,i,n,r and v = 500 μm; c,d,g,h,k,l,m,p,q,t,u,x and y = 10 μm.

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