| Title: | Molecular Cloning and Characterization of Five Glutathione S-Transferase Genes and Promoters from Micromelalopha troglodyta (Graeser) (Lepidoptera: Notodontidae) and Their Response to Tannic Acid Stress |
| Author(s): | Tang F; Tu H; Shang Q; Gao X; Liang P; |
| Address: | "Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, China. College of Forestry, Nanjing Forestry University, Nanjing 210037, China. School of Agricultural Science, Zhengzhou University, Zhengzhou 450001, China. Department of Entomology, China Agricultural University, Beijing 100193, China" |
| ISSN/ISBN: | 2075-4450 (Print) 2075-4450 (Electronic) 2075-4450 (Linking) |
| Abstract: | "Plants accumulate phenolic compounds such as tannic acid to resist insect herbivores. The survival of insects exposed to toxic secondary metabolites depends on the detoxification metabolism mediated by limited groups of glutathione S-transferases (GSTs). Micromelalopha troglodyta (Graeser) (Lepidoptera: Notodontidae) is an important foliar pest of poplar trees. GSTs play an important role in xenobiotic detoxification in M. troglodyta. Five GST genes were identified in M. troglodyta and were classified into five different cytosolic GST classes, delta, omega, sigma, theta, and zeta. Real-time fluorescent quantitative polymerase chain reaction (qPCR) was used to determine the mRNA expression of the five cloned GSTs in the midguts and fat bodies of M. troglodyta. The mRNA expression of the five GSTs was significantly induced when M. troglodyta was exposed to tannic acid. To further understand the tannic acid regulatory cascade, the 5'-flanking promoter sequences of the five MtGSTs were isolated by genome walking methods, and the promoters were very active and induced by tannic acid. In summary, the induction of GST mRNA expression was due to the response of five MtGST promoters to tannic acid. Therefore, MtGST promoters play an important role in the regulation of GST transcription" |
| Keywords: | Micromelalopha troglodyta glutathione S-transferases promoter tannic acid transcriptional regulation; |
| Notes: | "PubMed-not-MEDLINETang, Fang Tu, Huizhen Shang, Qingli Gao, Xiwu Liang, Pei eng 31370652, 30600476 and 30972376)/the National Natural Science Foundation of China/ Switzerland 2020/06/05 Insects. 2020 Jun 1; 11(6):339. doi: 10.3390/insects11060339" |
