Camera assays on stem internode sections from pUbi- luc and pUbi- luc * maturing transgenic plant lines. Assayed glasshouse grown plant stems typically contained ~20 internodes (~6-7 ft tall to the uppermost visible dewlap). The average pixel intensities were background subtracted. IN3B represents the third internode from the base of the stem. The error bars represent the standard error of the mean across 15 transgenic lines per construct.