Saddleback Journal of Biology - Saddleback College

Fall 2009 Biology 3B Paper
test included the measurements of healthy and
unhealthy or dead plants. Green tea did not
significantly increase health and deionized water did
not significantly decrease health of Catharanthus
roseus (p=0.44) compared to the control group. The
average stem diameters for each day measured was
plotted over time and is shown in figure 1. Then we
performed another ANOVA single variable test on the
data with the unhealthy and dead plants omitted.
Change in stem diameter over time (All)
Again, green tea did not significantly increase health
and deionized water did not significantly decrease
health of Catharanthus roseus (p=0.69) compared to
the control group. Also, the average stem diameters for
this modified data were plotted over time and are
shown in figure 2. The CCI values should be between 1
(no chlorophyll) and 70 (very high chlorophyll), but
our CCI values were far above 70. The lowest CCI for
any group was 96 and went as high as 1000.
4.2
Stem Diameter (cm)
3.7
3.2
2.7
G.T.
DI
Tap
2.2
10/5/2009 10/10/2009 10/15/2009 10/20/2009 10/25/2009 10/30/2009 11/4/2009
Date
Figure 1. The average measurements of stem diameters taken from all plants over period of
five weeks.
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Saddleback Journal of Biology
Spring 2010