Figure 5.

Photosynthesis and Transpiration Rates in 2° Leaves of 1° Leaf-Inoculated Col-0, ald1, sid2, and sid2 ald1 Plants.

(A) CO₂ uptake rates as a measure of photosynthetic capacity at 48 h after Psm inoculation or MgCl₂ infiltration measured in distal, untreated leaves of Col-0, sid2, ald1, and sid2 ald1 plants, as determined by IRGA. Data represent the mean ± sd of four biological replicates (CO₂ uptake rate of four distal leaves from different plants).

(B) Rates of transpiration (water loss) in distal leaves, determined as described above by IRGA.

Asterisks denote statistically significant differences between Psm-treated and mock control plants (**P < 0.01; two-tailed t test).