Figure 5.

Leaf senescence induction by application of hormones to DRL1-overexpressing transgenic tobacco plants. (a, b) Detached leaf senescence phenotypes of transgenic tobacco treated with abscisic acid (a) and determination of chlorophyll concentration (b). (c, d) Leaf senescence phenotypes of transgenic tobacco leaf disks treated with ABA (c) and determination of chlorophyll content (d). (e) Leaf senescence phenotypes of transgenic tobacco treated with salicylic acid, methyl jasmonate, or ethylene followed by determination of chlorophyll content (f). Bars represent mean ± SD with at least three biological replicates. Significant difference from the WT was confirmed by Tukey’s test (* p < 0.05).