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Figure 7 | EvoDevo

Figure 7

From: Somatic and germline expression of piwi during development and regeneration in the marine polychaete annelid Capitella teleta

Figure 7

Ct-piwi1 expression patterns in two-week post-metamorphic juveniles. All panels are ventral views with anterior to the left. Abbreviations: mgp, male gamete precursor; io, immature oocytes; pgz, posterior growth zone; fgp, female germline precursors. Dotted lines in A and B indicate the segment boundaries of the fifth and sixth segments. Black solid lines in A and B indicate the thoracic abdominal boundary. (A) In a male juvenile, Ct-piwi1 expression is in the PGCs in the fifth and sixth segments (arrow), and in bilaterally symmetrical male gamete precursors at the boundaries of the seventh and eighth segment and eighth and ninth segment. (B) In a female juvenile, expression is in the PGCs (arrow) and immature oocytes in the ovaries, which begin at the 10th segment (the first abdominal segment). (C) Male juvenile displaying lack of expression in abdominal segments. (D) Female juvenile showing Ct-piwi1 expression in immature oocytes in abdominal segments. (E) Expression in the posterior growth zone of a male juvenile. (F) In a female juvenile, expression is in female germline precursors and the posterior growth zone. Scale bar, 50 μm for all panels.

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