Fig. 6.

Abnormal intestinal karyokinesis in C. elegans fed with Rhizobium depends on oxygen. (A) The graph shows the percentage of C. elegans with defective gut nuclear division when grown on Rhizobium from hatching in a chamber with indicated concentration of oxygen; n > 50, P value is shown. (A and B) Fluorescence images of gut nuclei in adult C. elegans fed on Rhizobium and maintained at 100% oxygen; (A) arrows point to elongated nuclei, fragmented nuclei, and nuclei connected with DNA bridges. (B) Closely positioned nuclei indicate a failed nuclei segregation. (C) Images of C. elegans fed with E. coli at 100% oxygen from the time of hatching illustrate abnormal gut nuclei pattern (arrowheads and Insets).