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. 2015 May 25;209(4):595–608. doi: 10.1083/jcb.201409142

Figure 1.

Figure 1.

Tkv acts in ECs to restrict germline proliferation. (A) Schematic of a Drosophila germarium. (B and C) Compared with a control (c587ts/+) germarium (B), a tkvi (C; BL40937) germarium contains ectopic spectrosome-containing cells. Vasa (green) is a germ cell marker. (D) Statistical data showing the number of spectrosome-containing cells in control (c587ts/+), tkvi (c587ts;tkvi[BL-40937]), off-target construct rescue (c587ts;UAS-tkv[off-target]), or c587ts;tkvi/UAS-tkv[off-target] germaria. (E–G) A germarium carrying tkv8 mutant ECs (lack of GFP signal marked by arrowheads) exhibits more spectrosome-containing cells (E and F), which is rescued by restoring tkv expression (G). (E′) Cartoon model to illustrate the position of mutant EC clones (blue). The genotype of E is c587.UAS-flp; FRT40A.ubiGFP/FRT40A.tkv8. The genotype of G is c587.UAS-flp; FRT40A.ubiGFP/FRT40A.tkv8;UAS-tkv. (H) In addition to the germline expression (white arrows indicate GSCs and CBs and yellow arrows indicate developing oocytes), tkv mRNA is strongly detected in the ECs (arrowheads). (I) A c587ts;UAS-CD8GFP germarium exhibits strongly colocalized Tkv and GFP staining in ECs (arrows). Bars, 10 µm. ***, P < 0.001.