Figure 9.

Changes in the Rate of Photosynthetic Electron Transport after the Temperature Shift.

Detached healthy leaves of Samsun NN tobacco plants were inoculated with TMV (10 μg/mL; closed circles) or buffer only (Mock; open circles) and shifted from 30 to 20°C at time 0. Thylakoid membranes were isolated from leaves harvested at the indicated times after the temperature shift and were used to measure the whole-chain electron transport. Activity was expressed as the percentage of the control sample (0 hr after the temperature shift of mock-inoculated leaves). Values are the mean ±sd of three independent measurements.