西北林学院学报2025，Vol.40Issue(2)：51-63,13.DOI:10.3969/j.issn.1001-7461.2025.02.06
干旱胁迫下外源ABA对香樟R2R3-MYB亚家族转录因子表达的影响
Effects of Exogenous ABA on the Expression of R2R3-MYB Subfamily Transcription Factors in Cinnamomum camphora Under Drought Stress
摘要
Abstract
The R2R3-MYB subfamily of transcription factors is associated with plant growth and develop-ment and stress tolerance,and enhances drought tolerance in plants through specific binding to downstream target genes.In this study,90 R2R3-MYB subfamily members(CcMYB1 to CcMYB90)were identified based on the whole genome data of Cinnamomum camphora,and their bioinformatics and exogenous ABA-regulated expression patterns under drought stress were analyzed.The results showed that the R2R3-MYB subfamily genes were structurally similar and functionally diverse,and most of them were related to drought pathways and phytohormone responses;based on the gene expression profiling analysis of the tran-scriptome data,under drought stress,CcMYB 2,CcMYB9,CcMYB21,CcMYB46,CcMYB63 and CcMYB84 participated in C.camphora drought-resistant substances via positive regulation synthesis;combined with MYB binding sites involved in cis-acting elements participated in drought inducibility,CcMYB 16,Cc-MYB 51,CcMYB 52 may be involved in drought stress regulation through the dephosphorylation process in the ABA signaling pathway,CcMYB 2,CcMYB 21,CcMYB 22,CcMYB 61,CcMYB 63 may be associated with drought stress in the ABA-mediated stomatal movement.关键词
香樟/外源ABA/干旱胁迫/R2R3-MYB亚家族/转录因子/基因表达Key words
Cinnamomum camphora/exogenous ABA/drought stress/R2R3-MYB subfamily/transcription factor/gene expression分类
农业科技引用本文复制引用
关信,郑洋群,张亚东,王毅,郑元..干旱胁迫下外源ABA对香樟R2R3-MYB亚家族转录因子表达的影响[J].西北林学院学报,2025,40(2):51-63,13.基金项目
国家自然科学基金地区基金项目(32160736) （32160736）
云南省农业基础研究联合专项重点项目(202101BD070001-020) （202101BD070001-020）
云南省基础研究计划面上项目(202101AT070044) （202101AT070044）
"兴滇英才支持计划"青年人才专项(XDYC-QNRC-2022-0245). （XDYC-QNRC-2022-0245）
