Transcriptome and quality evaluation of Sichuan Dao-di herbs Zanthoxylum bungeanum

Abstract

"Huajiao" is dried ripe fruit peel of Zanthoxylum bungeanum or Z. schinifolium, is konwn as geoherbs, especially the "Dahongpao" cultivated in Hanyuan, Maoxian and Jiulong of Sichuan province. However, the genetic basis of Dao-di "Huajiao" is virtually unknown. The transcriptome of the fruit and leaf from Sichuan(Hanyuan, Jiulong, Lixian, Maoxian), Gansu(Wudu) province and Shaanxi(Fengxian) province was sequenced. Trinity de novo assembling resulted in a total of 177 616 unigenes. Through the KEGG, NR, SwissProt, Trembl, KOG/COG, GO, Pfam database comparision 106 644 annotated Unigene finally, 4 574 deferentially expressed genes were found in fruit between Sichuan and other provinces, including 3 740 up-regulated genes and 834 down-regulated genes. Among the up-regulated genes, 27 up-regulated genes were raleted to terpenoids, and 8 up-regulated genes were related to isoquinoline alkaloid bio-synthesis. Furthermore, it was also showed remarkable differences in groups which enrichment ratio of the diffe-rent expressed gene compared. The different expressed genes were annotated by the KEGG database into plant-pathogen interaction, plant hormone signal transduction and phenylpropanoid biosynthesis in fruit and leaf, but isoflavonoid bio-synthesis and betaine bio-synthesis were significantly different in fruit and leaf. The study laid a certain reference basis for comparison of quality and different expressed gene of Z. bungeanum from different groups.