Fig. 9.

Apparent proline consumption capacity of explants from leaf ranks #3 and #8 of oilseed rape plants receiving high or low N input for 10 days (N+W+ black filled square/N−W+ grey filled square) followed or not by water shortage for 7 days (N+W− open square/N−W− grey open square). The percentage of proline consumed after 4 hours in −0.04 MPa medium was estimated relative to the proline content measured after 6 hours of enrichment with proline (40 mM). Values are expressed as means of five independent replicates ± standard error. Asterisks indicate significant differences between leaf ranks for each treatment in the Student’s t test (*P ≤ 0.05; **P ≤ 0.01; ***P ≤ 0.001)