Comparative transcriptomics reveals defense acquisition in Brassica rapa by synchronizing brassinosteroids metabolism with PR1 expression
文献类型： 外文期刊
作者： Ahmad, Aqeel 1 ; Wang, Rui 1 ; Mubeen, Samavia 2 ; Akram, Waheed 1 ; Hu, Du 1 ; Yasin, Nasim Ahmad 3 ; Khan, Moman 4 ; Wu, Tingquan 1 ;
作者机构： 1.Guangdong Acad Agr Sci IFA, Inst Facil Agr, GDAAS, Lab New Technol Res Facil Agr, Guangzhou 510640, Peoples R China
2.Sun Yat Sen Univ, Sch Life Sci, State Key Lab Biocontrol, Guangzhou 510275, Peoples R China
3.Univ Punjab, RO 2 Wing, Lahore, Punjab, Pakistan
4.Univ Agr Faisalabad, Dept Plant Breeding & Genet, Faisalabad, Punjab, Pakistan
关键词： Biogenesis; Biological regulation; Hyaloperonospora brassicae; Pathogenesis-related; RNA-sequencing; Rhythmic process; Transcription factor; Transporter activity
期刊名称：EUROPEAN JOURNAL OF PLANT PATHOLOGY （ 影响因子：2.224； 五年影响因子：2.262 ）
ISSN： 0929-1873
年卷期： 2022 年 162 卷 4 期
页码：
收录情况： SCI
摘要： The current investigation reveals the molecular basis of Brassica rapa resistance against Hyaloperonospora brassicae based on RNA sequencing. The resistant line RB5 remained symptomless even after three days of post-inoculation. There was the maximum number of down-regulated genes (5156) in S1 after 96 h post-inoculation. Resistant line RB5 had 392 upregulated genes related to metabolic processes at 0 h post-inoculation. The comparison of both the lines after 96 h showed a slower but steady upregulation in the gene expression in RB5 (less than 3000 genes). The brassinosteroid (BR) biosynthesis pathway showed a down-regulation of its genes with the maximum down-regulation of BSK. Studying the calcium ions chain revealed 72% upregulated genes. However, the concluding physiological response resulted from the upregulation of PR genes (usually more than 2 times upregulation in most cases). Among PR genes, the loci Bra003774 and Bra025730 depicted an upregulation of more than two times, consequently supporting the elevated expression of WRKY22 and PR1. However, due to the end position of PR1 in defense responses, it was annotated as a delayed response factor to the attacking pathogen. MKS1 pathway was proved less sensitive toward the pathogenic attack; however, MEKK2 metabolism was proved more sensitive. After PR1, Zinc finger protein metabolism was the second highly activated process in the Brassica cells with the elevated expression of 42% genes. The study adds precious information about the host-pathogen relationship and could assist plant protection and food security programs.
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