Fig. 5From: Tomato (Solanum lycopersicum) SlIPT4, encoding an isopentenyltransferase, is involved in leaf senescence and lycopene biosynthesis during fruit ripeningReduced accumulation of ABA in SlIPT4-RNAi orange fruits. a ABA content was measured using HPLC analysis. b, c and d Relative expression levels of ABA biosynthesis-related genes were tested by qRT-PCR. The data of wild-type (WT) were taken as reference and normalized to 1. Each value shown as mean ± SE of three replicates. Asterisks represent significant differences between SlIPT4-RNAi line and wild-type control (*P < 0.05, **P < 0.01, Student’s t test)Back to article page