The effects of butanol and NAE on ABA-promoted leaf senescence.

A. Leaves of Arabidopsis Col were detached and floated immediately on water, 50 µM ABA, or 50 µM ABA plus 0.03% n-, sec-, or tert-butanol. B. Leaves of Arabidopsis Col were detached and floated immediately on water, 50 µM ABA, 50 µM ABA plus 10 µM NAE, or 50 µM ABA plus 0.03% n-butanol. The color bar at the bottom indicates Fv/Fm values.