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Transcriptomic Insights into Innate Immunity Responding to Red Rot Disease in Red Alga Pyropia yezoensis

文献类型： 外文期刊

作者： Tang, Lei 1 ; Qiu, Liping 1 ; Liu, Cong 1 ; Du, Guoying 1 ; Mo, Zhaolan 2 ; Tang, Xianghai 1 ; Mao, Yunxiang 1 ;

作者机构： 1.Ocean Univ China, Key Lab Marine Genet & Breeding, Minist Educ, Coll Marine Life Sci, Qingdao 266003, Shandong, Peoples R China

2.Chinese Acad Fishery Sci, Key Lab Maricultural Organism Dis Control, Minist Agr & Rural Affairs, Yellow Sea Fisheries Res Inst, Qingdao 266071, Shandong, Peoples R China

3.Hainan Trop Ocean Univ, Key Lab Utilizat & Conservat Trop Marine Bioresou, Minist Educ, Coll Fisheries & Life Sci, Sanya 572022, Peoples R China

关键词： Transcriptome; Pyropia yezoensis; innate immune systems; infection; Pythium porphyrae

期刊名称：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES （ 影响因子：5.923； 五年影响因子：6.132 ）

ISSN：

年卷期： 2019 年 20 卷 23 期

页码：

收录情况： SCI

摘要： yyyy Pyropia yezoensis, one of the most economically important marine algae, suffers from the biotic stress of the oomycete necrotrophic pathogen Pythium porphyrae. However, little is known about the molecular defensive mechanisms employed by Pyr. yezoensis during the infection process. In the present study, we defined three stages of red rot disease based on histopathological features and photosynthetic physiology. Transcriptomic analysis was carried out at different stages of infection to identify the genes related to the innate immune system in Pyr. yezoensis. In total, 2139 up-regulated genes and 1672 down-regulated genes were identified from all the infected groups. Pathogen receptor genes, including three lectin genes (pattern recognition receptors (PRRs)) and five genes encoding typical plant R protein domains (leucine rich repeat (LRR), nucleotide binding site (NBS), or Toll/interleukin-1 receptor (TIR)), were found to be up-regulated after infection. Several defense mechanisms that were typically regarded as PAMP-triggered immunity (PTI) in plants were induced during the infection. These included defensive and protective enzymes, heat shock proteins, secondary metabolites, cellulase, and protease inhibitors. As a part of the effector-triggered immunity (ETI), the expression of genes related to the ubiquitin-proteasome system (UPS) and hypersensitive cell death response (HR) increased significantly during the infection. The current study suggests that, similar to plants, Pyr. yezoensis possesses a conserved innate immune system that counters the invasion of necrotrophic pathogen Pyt. porphyrae. However, the innate immunity genes of Pyr. yezoensis appear to be more ancient in origin compared to those in higher plants.

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