Fig. 2.

Characterization of enzyme activities in sugarcane intermodal tissue involved in sucrose metabolism. Maximal catalytic activity for a sucrose phosphate synthase (SPS), b phosphofructokinase (PFK), c acid invertase (AI), d neutral invertase (NI), e hexokinase (HK), f fructokinase (FK) and g sucrose synthase [(hydrolysis) SUSY (hydrolysis)] were determined in wildtype (filled circle), OPu501 (open circle), OPu506 (filled inverted triangle) and OPu508 (open triangle). Values are presented as mean ± SE of four individual plants per line; an asterisk (*) indicates a value that were determined by the t test to be significantly different (P < 0.05) from the respective wildtype (WT) internode