Plant Ecology in a Changing World
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Page 162

Results from the Lactuca serriola leaf re-orientation growth experiment are shown below. Each of the experimental measures were significantly different from the control measurements.

Parameter

Water loss measures
Total daily transpiration from June 15 - July 19; units are grams of water l oss per plant per day

Total daily transpiration fromJuly 20 - July 27; units are grams of water loss per plant per day

Reproductive measures
Number of viable seeds produced per flower
Average seed weight (mg)
Total number of flowers per plant
Natural cauline-leaf orientation 
(control plant)
36.8


23.4



19.0
0.5
132.0
 Horizontal cauline-leaf orientation 
(experimental plant)
42.4


28.9



15.0
0.5
67.0
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Jim Ehleringer, University of Utah