Song Zhiqiang, Chen Chao, Duan Hua, Yu Ting, Zhang Yaqian, Wei Yuneng, Xu Decong, Liu Dong
Anhui Blueberry Engineering Technology Research Center, Collaborative Technology Service Center, School of Biology and Food Engineering, Anhui Green Food Rural Revitalization, Hefei Normal University, Hefei, 230601, China.
Institute of Industrial Crops, Anhui Academy of Agricultural Science, Hefei, 230031, China.
BMC Genomics. 2025 Feb 17;26(1):153. doi: 10.1186/s12864-025-11303-8.
Reactive oxygen species (ROS) serve as signal molecules in plant defense responses, and the respiratory burst oxidase homolog (RBOH) enzyme plays a crucial role in their production. Although numerous RBOH family members have been identified in various plants, little is known about the RBOH genes in blueberries. In this study, we identified six VcRBOH genes from the blueberry genome. Phylogenetic analysis revealed that these VcRBOH genes can be classified into three subgroups. Conserved domain and motif analysis demonstrated high sequence similarity among VcRBOH proteins. Analysis of cis-acting elements suggested that VcRBOH genes may be involved in stress, light, and phytohormone responsiveness. Based on transcriptome data, we observed low expression levels of VcRBOHB, VcRBOHC, and VcRBOHE during the flower_at_anthesis stage. In contrast, VcRBOHA and VcRBOHD showed relatively high expression levels in various tissues. The reverse-transcription quantitative PCR (RT-qPCR) analysis indicated rapid induction of VcRBOHF by flg22 and chitin treatments. Notably, overexpression of VcRBOHF in Arabidopsis promoted PTI responses, including increased expression of marker genes, ROS production, and callose deposition. Moreover, the overexpression of VcRBOHF resulted in enhanced disease resistance against Pseudomonas syringae pv. tomato (Pst) DC3000 infection. These findings provide valuable insights into the roles of VcRBOHF genes in plant defense responses and lay the groundwork for a more comprehensive understanding of the molecular mechanisms underpinning blueberry disease resistance.
活性氧(ROS)在植物防御反应中作为信号分子,而呼吸爆发氧化酶同源物(RBOH)酶在其产生过程中起关键作用。尽管在各种植物中已鉴定出许多RBOH家族成员,但对蓝莓中的RBOH基因了解甚少。在本研究中,我们从蓝莓基因组中鉴定出六个VcRBOH基因。系统发育分析表明,这些VcRBOH基因可分为三个亚组。保守结构域和基序分析表明VcRBOH蛋白之间具有高度的序列相似性。顺式作用元件分析表明,VcRBOH基因可能参与应激、光和植物激素反应。基于转录组数据,我们观察到在花盛开期,VcRBOHB、VcRBOHC和VcRBOHE的表达水平较低。相比之下,VcRBOHA和VcRBOHD在各种组织中表现出相对较高的表达水平。逆转录定量PCR(RT-qPCR)分析表明,flg22和几丁质处理可快速诱导VcRBOHF。值得注意的是,在拟南芥中过表达VcRBOHF可促进植物的PTI反应,包括标记基因表达增加、ROS产生和胼胝质沉积。此外,过表达VcRBOHF可增强对丁香假单胞菌番茄致病变种(Pst)DC3000感染的抗病性。这些发现为VcRBOHF基因在植物防御反应中的作用提供了有价值的见解,并为更全面地了解蓝莓抗病性的分子机制奠定了基础。