Fig. 6
The expression profiles of MdSDGs in response to abiotic and biotic stresses. For the abiotic stresses, ‘Golden Delicious’ (Malus×domestica) seedlings were subjected to cold (3 h), heat (0.5 h), and drought (6 d) treatments, and the leaf samples were collected for RNA-seq analysis. Each abiotic treatment was performed with three biological replicates. For Malus hupehensis seedings under drought, samples used for transcriptome analysis were collected at 0, 3, 6, and 9 days. The biotic analysis data were downloaded from the AppleMDO database (http://bioinformatics.cau.edu.cn/AppleMDO/index.php) based on the previous studies and illustrated with heat maps. The samples of these data were leaves infected with V. inaequalis at 0–14 dpi (SRP018878) and mature fruit infected by P. expansum (SRP150975). The log2 values of MdSDG FPKM (Fragments Per Kilobase per Million) levels among different samples are used to reflect the gene expression levels and are displayed with numbers in each square