文献类型：期刊文献

英文题名：A chromosome-scale genome of Rhus chinensis Mill. provides new insights into plant–insect interaction and gallotannins biosynthesis

作者：Ni, Bing-bing[1,2] Liu, Hong[1] Wang, Zhao-shan[1] Zhang, Guo-yun[1] Sang, Zi-yang[3] Liu, Juan-juan[1] He, Cai-yun[1,2] Zhang, Jian-guo[1,2]

第一作者：Ni, Bing-bing

机构：[1] State Key Laboratory of Tree Genetics and Breeding, Key Laboratory of Tree Breeding and Cultivation, National Forestry and Grassland Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, 100091, China; [2] Collaborative Innovation Center of Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, 210037, China; [3] Forest Enterprise of Wufeng County in Hubei Province, Hubei, Wufeng, 443400, China

年份：2024

卷号：118

期号：3

起止页码：766-786

外文期刊名：Plant Journal

收录：EI(收录号：20240515470026);Scopus(收录号：2-s2.0-85183371750)

语种：英文

外文关键词：Amino acids - Ammonia - Biochemistry - Flavonoids - Isomers - Metabolites - Plants (botany) - Scaffolds - Tannins - Transcription

摘要：Rhus chinensis Mill., an economically valuable Anacardiaceae species, is parasitized by the galling aphid Schlechtendalia chinensis, resulting in the formation of the Chinese gallnut (CG). Here, we report a chromosomal-level genome assembly of R. chinensis, with a total size of 389.40 Mb and scaffold N50 of 23.02 Mb. Comparative genomic and transcriptome analysis revealed that the enhanced structure of CG and nutritional metabolism contribute to improving the adaptability of R. chinensis to S. chinensis by supporting CG and galling aphid growth. CG was observed to be abundant in hydrolysable tannins (HT), particularly gallotannin and its isomers. Tandem repeat clusters of dehydroquinate dehydratase/shikimate dehydrogenase (DQD/SDH) and serine carboxypeptidase-like (SCPL) and their homologs involved in HT production were determined as specific to HT-rich species. The functional differentiation of DQD/SDH tandem duplicate genes and the significant contraction in the phenylalanine ammonia-lyase (PAL) gene family contributed to the accumulation of gallic acid and HT while minimizing the production of shikimic acid, flavonoids, and condensed tannins in CG. Furthermore, we identified one UDP glucosyltransferase (UGT84A), three carboxylesterase (CXE), and six SCPL genes from conserved tandem repeat clusters that are involved in gallotannin biosynthesis and hydrolysis in CG. We then constructed a regulatory network of these genes based on co-expression and transcription factor motif analysis. Our findings provide a genomic resource for the exploration of the underlying mechanisms of plant-galling insect interaction and highlight the importance of the functional divergence of tandem duplicate genes in the accumulation of secondary metabolites. ? 2024 Society for Experimental Biology and John Wiley & Sons Ltd.