Luminometer assays on tissue extracts from pUbi- luc and pUbi- luc * maturing plant transgenic lines. Glasshouse grown plants containing approximately 20 internodes (~1.8-2.1 m tall to the uppermost visible dewlap) were harvested after approximately 10 months of growth and tissue extracts assayed for luciferase activity. M-IN2 represents tissue containing the meristem down to internode 2. IN6 represents internode 6 tissue. Empty fill bars represent data from pUbi-luc lines whereas cross fill bars represent data from pUbi-luc* lines. RLU stands for relative light units, the output measurement of the luminometer. The error bars represent the standard error of the mean across 15 transgenic lines per construct.