Figure 1.

The PAO/phyllobilin pathway of chlorophyll (Chl) breakdown in leaves and in silico analysis of the expression of Chl catabolic enzymes (CCEs) in rice flag leaves during the grain-filling stage. (a) Enzymatic reactions of the first part of the Chl degradation pathway, from Chl b to primary fluorescent Chl catabolite (pFCC), that take place inside the chloroplast. See the text for abbreviations of enzyme names. Expression data were obtained from RNA-seq analysis (b) [20] and public microarray data (c) [21]. DAH; days after heading. Each expression data is normalized to starting time points ((b), 4 DAH; (c), 1 DAH, respectively). Based on the transcript levels of starting time points, the relative gene expression levels of other time points were quantified. The blue or red colors indicate the lower or higher transcript abundances than those of relevant control (white), respectively.