Zhang Peng, Yan Hanwen, Liu Yu, Chai Yi
Key Laboratory of Sustainable Crop Production in the Middle Reaches of the Yangtze River (Co-construction by Ministry and Province)/College of Agriculture, Yangtze University, Jingzhou, China.
Front Plant Sci. 2023 Jun 13;14:1144379. doi: 10.3389/fpls.2023.1144379. eCollection 2023.
Brassinazole-resistant (BZR) transcription factors (TFs) are key players in brassinolides (BRs) signaling pathway, which is widely involved in regulating plant growth and development, as well as in plant responding to a variety stresses. Despite their critical roles, little is known about BZR TFs in wheat. In this study, we performed genome-wide analysis of BZR gene family from wheat genome, and 20 were identified. Based on the phylogenetic relationships of and from rice and , all genes were clustered into four groups. The intron-exon structural patterns and conserved protein motifs of showed high group specificity. , 7, and 9 were significantly induced after salt, drought treatment, and stripe rust infection. However, , which was significantly upregulated under NaCl application, was not expressed during wheat-stripe rust fungus interaction. These results indicated that BZR genes in wheat play different roles in response to various stresses. The results of this study will lay a foundation for further in-depth functional studies of and will provide information for the breeding and genetic improvement of wheat against drought and salt stresses.
油菜素唑抗性（BZR）转录因子是油菜素内酯（BRs）信号通路中的关键因子，该信号通路广泛参与调控植物生长发育以及植物对多种胁迫的响应。尽管它们具有关键作用，但在小麦中对BZR转录因子的了解却很少。在本研究中，我们对小麦基因组中的BZR基因家族进行了全基因组分析，共鉴定出20个基因。基于来自水稻和拟南芥的BZR基因的系统发育关系，所有BZR基因被聚类为四组。BZR基因的内含子-外显子结构模式和保守蛋白基序表现出高度的组特异性。TaBZR1、TaBZR7和TaBZR9在盐胁迫、干旱处理和条锈菌感染后被显著诱导。然而，在NaCl处理下显著上调的TaBZR2在小麦与条锈菌互作过程中不表达。这些结果表明，小麦中的BZR基因在响应各种胁迫时发挥着不同的作用。本研究结果将为进一步深入研究BZR基因的功能奠定基础，并为小麦抗旱和抗盐胁迫的育种及遗传改良提供信息。
