spacer gif spacer gif spacer gif spacer gif spacer gif
QUICK SEARCH:   [advanced]


spacer gif
     Home     Help     Feedback     Subscriptions     Archive     Search     Table of Contents    

Right arrow Help viewing high resolution images
Right arrow Return to article

(Downloading may take up to 30 seconds.
If the slide opens in your browser, select File -> Save As to save it.)
Click on image to view larger version.


Figure 3


Fig. 3. Example of a selection experiment (20 generations) with Drosophila melanogaster (Harshman et al., 1991) in which plasticity evolved to be higher in the Selected lines (S; N=3) as compared with the Control lines (C; N=3). C flies (left) were exposed to either standard medium or lemon for 24 h prior to sacrifice for measurement of a detoxification enzyme, and S flies (right) were similarly treated. Values are means ± s.d. For C lines, the magnitude of the induction caused by lemon exposure, as indicated by glutathionase S-transferase activity on lemon divided by the value on standard medium, was 1.16, whereas for S lines the value was 2.58. The greater induction caused by lemon exposure in the S lines relative to the C lines is an example of a genotype-by-environment interaction. TSO, trans-stilbene oxide. See text for further details.





Right arrow Return to article