PDC2 | Pyruvate decarboxylase 2

HRA1 contributes to plant submergence survival.(A) Effect of HRA1 misexpression on rosette growth in air, or after recovery from 72 h submergence in darkness. Scale bar, 2 cm. (B) Percentage of plants surviving flooding-induced hypoxia (n?=?5), dry weight of rosette plants kept under control growth conditions (n?=?6), and dry weight of rosettes after postsubmergence recovery (n?=?6). Data are mean ± s.d.; *p<0.05, significant differences from the wild type after one-way ANOVA. (C) HRA1 regulates target gene transcripts in an age-dependent manner in leaves of plants treated with complete submergence. Transcripts were measured before submergence (“control conditions”), after 4 h submergence in darkness (“submergence”), and after 1 h de-submergence in the light (“reoxygenation”). Relative transcript values were calculated using old leaves of the wild type under control conditions as the reference sample. Data are mean ± s.d. (n?=?3); letters indicate statistically significant differences between genotypes after one-way ANOVA (p<0.05) performed independently on each leaf type. (D) Western blot analysis of ADH and PDC protein accumulation in leaves at different developmental stages from control and submerged (4 h) plants. The full-size images of the hybridized membranes can be found in Figure S10. (E) Stability of the translational fusion RAP2.12:RrLuc protein (RrLuc, Renilla reniformis luciferase) in Arabidopsis mesophyll protoplasts upon transfection with increasing amounts of 35S:HRA1. RAP2.12:RrLuc abundance was evaluated from the RrLuc relative activity, measured through a dual luciferase assay. Data are mean ± s.d. (n?=?4), and the asterisks indicate statistically significant differences (p<0.05) from protoplasts expressing RAP2.12:RrLuc alone, after one-way ANOVA.