Direct Suc access to the meristem reactivates cell proliferation in the absence of light in a TOR-dependent manner. CYCB1;1::DB-GUS-expressing seedlings were grown on solid medium plates in light for 7 d, transferred to Suc-free liquid medium in the dark for 3 d, and visualized for GUS expression as follows: after subsequent transfer to medium containing Suc, or to medium containing Suc plus AZD-8055, or to Suc-free medium, for the times indicated. Bar = 500 µm.