Transcriptome and Metabolome Revealed the Mechanism of NtBRL3 Overexpression Tobacco(Nicotiana tabacum L.K326)in Response to Drought Stress  

作　　者：Jing Yang Tianxiunan Pu Ke Wan Linqi Wang Yuanshuai Shi Xu Luo Jie Tan Dongmei Wang Yang Liu 

机构地区：[1]College of Tobacco Science of Guizhou University,Guizhou Key Laboratory for Tobacco Quality,Guiyang,550025,China

出　　处：《Phyton-International Journal of Experimental Botany》2023年第9期2555-2576,共22页国际实验植物学杂志（英文）

基　　金：supported by the Science and Technology Project of Guizhou Tobacco Company(2021XM04);the Creation of“Tobacco T-DNA Activation Insertion Mutant Library and Screening of Important Trait Mutants”Project of Guizhou University Talent Introduction(Guizhou University Hezi[2013]50).

摘　　要：Drought has severely affected the yield and quality of commercial crops.The BRI1 family plays an important role in plant response to drought stress,and BRL3 gene plays an important role in the study of drought in Arabidopsis thaliana.In this study,NtBRL3 was constructed as a vector and genetically transformed to obtain‘N.Tobacco K326’overexpression of NtBRL3.The enzyme activities of transgenic tobacco and wild-type tobacco were measured and transcriptome and metabolome analyses were performed.The results showed that the antioxidant enzymes of transgenic tobacco were more active under drought conditions,and 85 significantly differentially metabolites and 106 significantly differentially expressed genes were identified in the metabolome and transcriptome analyses,respectively.Transgenic tobacco NtBRL3ox demonstrated an excessive accumulation of droughtrelated metabolites,sugars such as sucrose and maltotetraose,and amino acids such as proline,compared with WT.We discovered drought-related differential genes in the root transcriptome,among which LOX6,RD22,WSD1,CCD8,and UGT were key genes which play an important role in plant response to drought stress.Our results demonstrate that NtBRL3 overexpression in K326 enhances drought resistance in transgenic tobacco.

关 键 词：Nicotiana tabacum L.K326 TRANSCRIPTOME METABOLOME BRL3 gene drought stress 

分 类 号：Q94[生物学—植物学]