Figure 5
AsAtcontent of petiole exudates after treatment of source leaves with AsA precursors.Terminal leaflets of glasshouse grown potato plants were supplied with 500 μl of the substrate indicated (25 mM) via a 'flap' whilst still attached to the plant. After 24 h incubation, leaflets were removed for AsAtdetermination in tissues and collection of exudates (90 min). Bars represent the mean exudate AsAtpeak area ± SE (n = 4) and values in boxes represent the mean tissue AsAtcontent (mg/100 gFW) ± SE (n = 4). mAUt = milli-absorbance units (λ245 nm) × time