文献类型： 外文期刊

作者： Ge, Chunxia ¹ ; Wang, Yi-Ge ¹ ; Lu, Shouping ³ ; Zhao, Xiang Yu ⁴ ; Hou, Bing-Kai ¹ ; Balint-Kurti, Peter J. ⁵ ; Wang, ¹ ;

作者机构： 1.Shandong Univ, Sch Life Sci, Key Lab Plant Dev & Environm Adaptat Biol, Minist Educ, Qingdao, Peoples R China

2.Binzhou Med Univ, Sch Publ Hlth & Management, Yantai, Peoples R China

3.Shandong Acad Agr Sci, Maize Res Inst, Jinan, Peoples R China

4.Shandong Agr Univ, State Key Lab Crop Biol, Tai An, Shandong, Peoples R China

5.North Carolina State Univ, Dept Entomol & Plant Pathol, Raleigh, NC USA

6.USDA ARS, Plant Sci Res Unit, Raleigh, NC 27695 USA

关键词： disease resistance; ETI; hypersensitive response; maize; NLR; salicylic acid; UGT

期刊名称：FRONTIERS IN PLANT SCIENCE （ 影响因子：5.754； 五年影响因子：6.612 ）

ISSN： 1664-462X

年卷期： 2021 年 12 卷

页码：

收录情况： SCI

摘要： Maize is one of the major crops in the world; however, diseases caused by various pathogens seriously affect its yield and quality. The maize Rp1-D21 mutant (mt) caused by the intragenic recombination between two nucleotide-binding, leucine-rich repeat (NLR) proteins, exhibits autoactive hypersensitive response (HR). In this study, we integrated transcriptomic and metabolomic analyses to identify differentially expressed genes (DEGs) and differentially accumulated metabolites (DAMs) in Rp1-D21 mt compared to the wild type (WT). Genes involved in pathogen-associated molecular pattern (PAMP)-triggered immunity (PTI) and effector-triggered immunity (ETI) were enriched among the DEGs. The salicylic acid (SA) pathway and the phenylpropanoid biosynthesis pathway were induced at both the transcriptional and metabolic levels. The DAMs identified included lipids, flavones, and phenolic acids, including 2,5-DHBA O-hexoside, the production of which is catalyzed by uridinediphosphate (UDP)-dependent glycosyltransferase (UGT). Four maize UGTs (ZmUGTs) homologous genes were among the DEGs. Functional analysis by transient co-expression in Nicotiana benthamiana showed that ZmUGT9250 and ZmUGT5174, but not ZmUGT9256 and ZmUGT8707, partially suppressed the HR triggered by Rp1-D21 or its N-terminal coiled-coil signaling domain (CCD21). None of the four ZmUGTs interacted physically with CCD21 in yeast two-hybrid or co-immunoprecipitation assays. We discuss the possibility that ZmUGTs might be involved in defense response by regulating SA homeostasis.