Figure 4.

Entrainment, Treatment, and Posttreatment Regimes Determine the Severity of the Circadian Stress Phenotype in Cytokinin-Deficient Plants.

(A) Scheme of the standard stress regime including the 32-h CL treatment. White, light period; gray, dark period.

(B) Severity of cell death in Pro35S:CKX4 plants induced by variations of the standard stress regime with changes in entrainment (green), treatment (orange), or posttreatment (gray), as indicated in (A). −, No lesions. +, ≤30%; ++, 31 to 50%; and +++, >50% of mature leaves with lesions. Arrow up/arrow down, factors and conditions promoting or noninducing/reducing the cell death phenotype, respectively.

See Supplemental Figures 2 to 4 for corresponding data.