Abstract:In order to understand the expression patterns in different tissues and under abiotic stress of ascorbate peroxidase (APX) gene family in Phyllostachys edulis, seven PeAPXs were obtained from the genomic database of P. edulis. PeAPXs could be divided into three subfamilies, including cytoplasmic, peroxisome and chloroplast/mitochondrion types based on the predictions of subcellular localizations. There were drought, cold, and light responses elements in promoter sequences of each gene, such as Box-4 and G-Box. The expression of PeAPXs were different among seven tissues, showing tissue specificity. qRT-PCR revealed that there were great differences in the expression pattern of each gene under drought, salt and low temperature stress. The expression of PeAPX2 was maintained at high level under three stresses. The expression of PeAPXs were induced by low temperature stress. Under drought stress, the expression of PeAPX1 was down-regulated, while the expression of PeAPX3, PeAPX6 and PeAPX7 were not detected. Under salt stress, all of PeAPXs were up-regulated except PeAPX3 and PeAPX5. Therefore, PeAPXs may be involved in different abiotic stress processes and play an important role in the growth and development stage of P. edulis.
