Research Article

Foliar Spraying with Compound Amino Acid-Iron Fertilizer Increases Leaf Fresh Weight, Photosynthesis, and Fe-S Cluster Gene Expression in Peach (Prunus persica (L.) Batsch)

Figure 3

Fe-S cluster biosynthesis genes were differentially expressed at different leaf developmental stages. Leaf samples were collected on March 15th (S1), before the spraying treatment, April 10th (S2), July 10th (S3), October 15th (S4), and November 15th (S5), in 2018. The relative expression level of genes was presented after normalization to the internal control Ubiquitin and calculated using a log2 scale. The heatmap was plotted using HemI software according to the method described by Deng et al. [30]. The red and blue boxes indicate the high and low expression levels, respectively.