Figure 4. Mutations at SA biosynthesis and signaling suppressed age-dependent precocious leaf senescence by PAT14 loss-of-function.
(A,B) Relative transcript abundance of SAGs (SAG12, SAG13 and SAG21) as well as SA responsive genes (PAD4, PR1, and SID2) in wild type, npr1-5, NahG, pat14-2, pat14-2 npr1-5, and pat14-2 NahG at week 4 (W4, A) or week 5 (W5, B) by qRT-PCRs. The 4th pair of true leaves was used for RNA extractions. Results are given as means ± SD of one out of three independent experiments. Asterisks indicate significant difference from either of the other samples (t-test, P < 0.01).