Fig. 7. MdBT2 delayed the MdZAT10-promoted leaf senescence.

a Leaf senescence phenotype and b chlorophyll content of detached leaves from wild-type (GL-3) and transgenic apple seedlings overexpressing MdBT2 (MdBT2-OE-L1, MdBT2-OE-L5) and MdBT2 antisense (MdBT2-Anti-L13, MdBT2-Anti-L23) that were floated on 3 mM MES buffer with 100 μM MeJA in the dark for 12 days. c Leaf senescence phenotype and d chlorophyll content of detached leaves from Col and transgenic Arabidopsis MdZAT10-L1, MdZAT10-L1/MdBT2-L1, and MdZAT10-L1/MdBT2-L2 that were floated on 3 mM MES buffer in the dark for 6 days. e Leaf senescence phenotype and f chlorophyll content of apple leaves transiently expressing empty vector (EV) or overexpressing MdZAT10 alone or MdZAT10 and MdBT2 were floated on 3 mM MES buffer in the dark for 13 days. Asterisks indicate significant differences at ^*P < 0.05, ^**P < 0.01