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Deciphering the Molecular Mechanisms That Regulate Rice Plant Disease and Immunity

A special issue of International Journal of Molecular Sciences (ISSN 1422-0067). This special issue belongs to the section "Molecular Plant Sciences".

Deadline for manuscript submissions: closed (31 March 2024) | Viewed by 6448

Special Issue Editor

Prof. Dr. Aiping Zheng

E-Mail Website
Guest Editor
1. College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China
2. State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China, Chengdu 611130, China
Interests: rice fungal diseases; rice sheath blight; pathogen–host interactions; plant protection
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

This research initiative seeks to elucidate the detailed molecular processes underlying the development of plant diseases and the activation of the immune system. The ability of plants to defend themselves from pathogens is crucial to the health and productivity of agricultural systems. Despite significant advances in the comprehension of plant immunity, the molecular complexities involved still need to be thoroughly uncovered.

This study attempts to decipher the signaling pathways, gene regulation networks, and protein interactions contributing to disease susceptibility and resistance by employing a multidisciplinary approach encompassing genetics, genomics, biochemistry, and advanced imaging techniques. Insights gained from this research will enhance our fundamental comprehension of plant–pathogen interactions and provide valuable information for the development of innovative strategies to boost plant immunity and reduce disease-related agricultural losses. Reviews, original research, and communications will be welcomed.

Prof. Dr. Aiping Zheng
Guest Editor

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Keywords

  • plant disease
  • pathogen
  • plant immunity
  • disease susceptibility
  • resistance
  • plant–pathogen interaction

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Published Papers (3 papers)

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Research

17 pages, 2806 KiB  
Article
Map-Based Cloning and Characterization of a Major QTL Gene, FfR1, Which Confers Resistance to Rice Bakanae Disease
by Hyeonso Ji, Kyeong-Seong Cheon, Yunji Shin, Chaewon Lee, Seungmin Son, Hyoja Oh, Dong-Kyung Yoon, Seoyeon Lee, Mihyun Cho, Soojin Jun, Gang-Seob Lee, Jeongho Baek, Song Lim Kim, Il-Pyung Ahn, Jae-Hyeon Oh, Hye-Jin Yoon, Young-Soon Cha and Kyung-Hwan Kim
Int. J. Mol. Sci. 2024, 25(11), 6214; https://doi.org/10.3390/ijms25116214 - 5 Jun 2024
Cited by 2 | Viewed by 1553
Abstract
Bakanae disease (BD), caused by the fungal pathogen Fusarium fujikuroi, is a serious threat to rice production worldwide. Breeding elite rice varieties resistant to BD requires the identification of resistance genes. Previously, we discovered a resistant quantitative trait locus (QTL), qFfR1, [...] Read more.
Bakanae disease (BD), caused by the fungal pathogen Fusarium fujikuroi, is a serious threat to rice production worldwide. Breeding elite rice varieties resistant to BD requires the identification of resistance genes. Previously, we discovered a resistant quantitative trait locus (QTL), qFfR1, in a Korean japonica rice variety, Nampyeong. In this study, we fine-mapped qFfR1 with a Junam*4/Nampyeong BC3F3 population and delimited its location to a 37.1 kb region on chromosome 1. Complementation experiments with seven candidate genes in this region revealed that OsI_02728 is the gene for qFfR1. This gene encodes a protein with a typical leucine-rich repeat (LRR) receptor-like protein structure. RNA-sequencing-based transcriptomic analysis revealed that FfR1 induces the transcription of defense genes, including lignin and terpenoid biosynthesis genes, pathogenesis-related genes, and thionin genes. These results may facilitate investigations into the molecular mechanisms underlying BD resistance, including molecular patterns of Fusarium fujikuroi interacting with FfR1 and players working in signal transduction pathways downstream of FfR1, and the breeding of new BD-resistant varieties by providing a BD resistance gene with its precise selection marker. This will contribute to efficient control of BD, which is becoming more prevalent according to temperature rises due to climate change. Full article
(This article belongs to the Special Issue Deciphering the Molecular Mechanisms That Regulate Rice Plant Disease and Immunity)
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15 pages, 2780 KiB  
Article
OsLRR-RLP2 Gene Regulates Immunity to Magnaporthe oryzae in Japonica Rice
by Hyo-Jeong Kim, Jeong Woo Jang, Thuy Pham, Van Tuyet, Ji-Hyun Kim, Chan Woo Park, Yun-Shil Gho, Eui-Jung Kim, Soon-Wook Kwon, Jong-Seong Jeon, Sun Tae Kim, Ki-Hong Jung and Yu-Jin Kim
Int. J. Mol. Sci. 2024, 25(4), 2216; https://doi.org/10.3390/ijms25042216 - 12 Feb 2024
Cited by 2 | Viewed by 2084
Abstract
Rice is an important cereal crop worldwide, the growth of which is affected by rice blast disease, caused by the fungal pathogen Magnaporthe oryzae. As climate change increases the diversity of pathogens, the disease resistance genes (R genes) in plants must [...] Read more.
Rice is an important cereal crop worldwide, the growth of which is affected by rice blast disease, caused by the fungal pathogen Magnaporthe oryzae. As climate change increases the diversity of pathogens, the disease resistance genes (R genes) in plants must be identified. The major blast-resistance genes have been identified in indica rice varieties; therefore, japonica rice varieties with R genes now need to be identified. Because leucine-rich repeat (LRR) domain proteins possess R-gene properties, we used bioinformatics analysis to identify the rice candidate LRR domain receptor-like proteins (OsLRR-RLPs). OsLRR-RLP2, which contains six LRR domains, showed differences in the DNA sequence, containing 43 single-nucleotide polymorphisms (SNPs) in indica and japonica subpopulations. The results of the M. oryzae inoculation analysis indicated that indica varieties with partial deletion of OsLRR-RLP2 showed susceptibility, whereas japonica varieties with intact OsLRR-RLP2 showed resistance. The oslrr-rlp2 mutant, generated using clustered regularly interspaced palindromic repeats (CRISPR)/CRISPR-associated protein 9 (Cas9), showed increased pathogen susceptibility, whereas plants overexpressing this gene showed pathogen resistance. These results indicate that OsLRR-RLP2 confers resistance to rice, and OsLRR-RLP2 may be useful for breeding resistant cultivars. Full article
(This article belongs to the Special Issue Deciphering the Molecular Mechanisms That Regulate Rice Plant Disease and Immunity)
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17 pages, 5286 KiB  
Article
OsACA9, an Autoinhibited Ca2+-ATPase, Synergically Regulates Disease Resistance and Leaf Senescence in Rice
by Xinyu Wang, Ziyao Wang, Yiduo Lu, Jiani Huang, Zhuoer Hu, Junlei Lou, Xinyue Fan, Zhimin Gu, Pengcheng Liu, Bojun Ma and Xifeng Chen
Int. J. Mol. Sci. 2024, 25(3), 1874; https://doi.org/10.3390/ijms25031874 - 3 Feb 2024
Cited by 2 | Viewed by 2335
Abstract
Calcium (Ca2+) is a versatile intracellular second messenger that regulates several signaling pathways involved in growth, development, stress tolerance, and immune response in plants. Autoinhibited Ca2+-ATPases (ACAs) play an important role in the regulation of cellular Ca2+ homeostasis. [...] Read more.
Calcium (Ca2+) is a versatile intracellular second messenger that regulates several signaling pathways involved in growth, development, stress tolerance, and immune response in plants. Autoinhibited Ca2+-ATPases (ACAs) play an important role in the regulation of cellular Ca2+ homeostasis. Here, we systematically analyzed the putative OsACA family members in rice, and according to the phylogenetic tree of OsACAs, OsACA9 was clustered into a separated branch in which its homologous gene in Arabidopsis thaliana was reported to be involved in defense response. When the OsACA9 gene was knocked out by CRISPR/Cas9, significant accumulation of reactive oxygen species (ROS) was detected in the mutant lines. Meanwhile, the OsACA9 knock out lines showed enhanced disease resistance to both rice bacterial blight (BB) and bacterial leaf streak (BLS). In addition, compared to the wild-type (WT), the mutant lines displayed an early leaf senescence phenotype, and the agronomy traits of their plant height, panicle length, and grain yield were significantly decreased. Transcriptome analysis by RNA-Seq showed that the differentially expressed genes (DEGs) between WT and the Osaca9 mutant were mainly enriched in basal immune pathways and antibacterial metabolite synthesis pathways. Among them, multiple genes related to rice disease resistance, receptor-like cytoplasmic kinases (RLCKs) and cell wall-associated kinases (WAKs) genes were upregulated. Our results suggest that the Ca2+-ATPase OsACA9 may trigger oxidative burst in response to various pathogens and synergically regulate disease resistance and leaf senescence in rice. Full article
(This article belongs to the Special Issue Deciphering the Molecular Mechanisms That Regulate Rice Plant Disease and Immunity)
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