Plant viruses and viroids in Japan

Fuji, Shin-ichi; Mochizuki, Tomofumi; Okuda, Mitsuru; Tsuda, Shinya; Kagiwada, Satoshi; Sekine, Katsuyuki; Ugaki, Masashi; Natsuaki, Keiko T.; Isogai, Masamichi; Maoka, Tetsuo; Takeshita, M; Yoshikawa, Nobuyuki; Mise, Kazuyuki; Sasaya, Takahide; Kondō, Hideki; Kubota, Kenji; Yamaji, Yutaka; Iwanami, Toru; Ohshima, Kazusato; Kobayashi, Kappei; Hataya, Tatsuji; Shimmen, Teruo; Suzuki, Nobuhiro

doi:10.1007/s10327-022-01051-y

Cited by 17 publications

(6 citation statements)

References 208 publications

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“…CWMV was first reported in wheat in Shandong Province, China, in 1999 and can cause severe disease symptoms (Diao et al ., 1999 ). CWMV has also been detected in the northern areas of Japan (Fuji et al ., 2022 ; Maejima et al ., 2010 ). The optimal temperature for CWMV infection was 15 ± 2 °C (Andika et al ., 2013a ; Yang et al ., 2022 ).…”

Section: Introductionmentioning

confidence: 99%

TaTHI2 interacts with Ca²⁺‐dependent protein kinase TaCPK5 to suppress virus infection by regulating ROS accumulation

Yang,

Chen,

Zhang

et al. 2023

Plant Biotechnology Journal

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SummaryThiamine (vitamin B1) biosynthesis involves key enzymes known as thiazole moieties (THI1/THI2), which have been shown to participate in plant responses to abiotic stress. However, the role of THI1/THI2 in plant immunity remains unclear. In this study, we cloned TaTHI2 from wheat and investigated its function in Chinese wheat mosaic virus (CWMV) infection. Overexpression of TaTHI2 (TaTHI2‐OE) inhibited CWMV infection, while TaTHI2 silencing enhanced viral infection in wheat. Interestingly, the membrane‐localized TaTHI2 protein was increased during CWMV infection. TaTHI2 also interacted with the Ca2+‐dependent protein kinase 5 (TaCPK5), which is localized in the plasma membrane, and promoted reactive oxygen species (ROS) production by repressing TaCPK5‐mediated activity of the catalase protein TaCAT1. CWMV CP disrupted the interaction between TaTHI2 and TaCAT1, reducing ROS accumulation and facilitating viral infection. Additionally, transgenic plants overexpressing TaTHI2 showed increased seed number per ear and 1000‐kernel weight compared to control plants. Our findings reveal a novel function of TaTHI2 in plant immunity and suggest its potential as a valuable gene for balancing disease resistance and wheat yield. Furthermore, the disruption of the TaTHI2‐mediated plant immune pathway by CWMV CP provides further evidence for the evolutionary arms race between plants and viruses.

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Section: Introductionmentioning

confidence: 99%

TaTHI2 interacts with Ca²⁺‐dependent protein kinase TaCPK5 to suppress virus infection by regulating ROS accumulation

Yang,

Chen,

Zhang

et al. 2023

Plant Biotechnology Journal

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“…In general, in order of abundance Martellivirales > Picornavirales > Tolivirales. With the exception of a few species that infect fungi and oomycetes, most species of Martellivirales are plant viruses 25,26 . Picornavirales, RNA viruses infecting eukaryotes, including diatoms, are widespread in the ocean 9,10,27 , with such groups accounting for the vast majority of RNA viruses.…”

Section: Discussionmentioning

confidence: 99%

Diverse, abundant and stable coastal RNA viruses identified by spatiotemporal metatranscriptomics

Sun

Zheng

Liang

et al. 2022

Preprint

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The diversity and spatiotemporal dynamics of a coastal RNA virus community, was investigated focusing on the effects of a bloom of the macroalgae U. prolifera through a metatranscriptomic reconstruction of ~ 880Gb of Qingdao Coastal RNA sequences from May 2019 to December 2020. 6,079 RNA viral contigs were identified and these generated 2,351 viral operational taxonomic units within known orders. The analysis found that structural components of the coastal marine RNA virus community are diverse, abundant and stable. The viruses were mainly associated with eukaryotes from Intramacronucleata, Chlorophyta, Bacillariophyta and Dinophyceae, bacteria from Flavobacteriales and Rhodobacterales and MGII and Nitrosopumilales from archaea. The viral auxiliary metabolic genes indicate that coastal RNA viruses manipulate reprogramming of diverse host metabolisms, including carbon cycling, signaling pathways, membrane transport, transcription and translation. Together these results provide critical insights for incorporating RNA viruses into marine ecological and epidemiological models.

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“…Transmission of citrus viruses and viroids has been significantly assisted by both mechanical and vegetative methods. Citrus viruses have also been reported to be successfully transmitted through horticulture tools, during grafting, pruning and cutting ( Fuji et al, 2022 ; Hadidi et al, 2022 ).…”

Section: Introductionmentioning

confidence: 99%

Molecular characterization of divergent isolates of Citrus bent leaf viroid (CBLVd) from citrus cultivars of Punjab, Pakistan

et al. 2023

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Citrus viroid infection is emerging as a serious threat because of its efficient systemic movement within the host plant and its quick spread due to contaminated pruning tools. A survey was conducted to investigate the primary distribution and molecular characterization of Citrus bent leaf viroid (CBLVd) and its variants in different citrus cultivars. A total of 154 symptomatic citrus samples were collected and detected by RT‒PCR with newly designed specific primers with the incidence of 36.33%. During biological indexing study on Etrog citron, expressions of reduced leaf size, yellowing with a light green pattern, and bending were observed. Amplified products were sequenced and analyzed using a nucleotide BLAST search, which showed 98% homology with other CBLVd isolates. The results of the phylogenetic tree analysis showed the presence of two main groups (A and B), with the predominant variants of CBLVd, i.e., CVd-I-LSS (Citrus viroid Low Sequence Similarity) sequences, clustering in subgroup A1 along with newly detected CVd-I-LSS from Palestinian sweet lime (Citrus limettioides), which has been identified as a new host of CVd-I-LSS in Pakistan. Further analysis of the sequences in subgroup A1 showed that the variant of CVd-I-LSS infecting citrus cultivars had a close relationship with isolates reported from China, Japan, and Iran, which may have resulted from the exchange of planting material. This study also unveiled the variability in nucleotide sequences of CBLVd, which made it unable to be detected by old primers. The results of this study indicate that the widespread presence of divergent variants of CBLVd is a major concern for the citrus industry in Pakistan and other countries where virulent isolates of CBLVd are prevalent. These findings suggest the need for future research on effective management and quarantine measures to stop the spread of CBLVd.

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Plant viruses and viroids in Japan

Cited by 17 publications

References 208 publications

TaTHI2 interacts with Ca²⁺‐dependent protein kinase TaCPK5 to suppress virus infection by regulating ROS accumulation

TaTHI2 interacts with Ca²⁺‐dependent protein kinase TaCPK5 to suppress virus infection by regulating ROS accumulation

Diverse, abundant and stable coastal RNA viruses identified by spatiotemporal metatranscriptomics

Molecular characterization of divergent isolates of Citrus bent leaf viroid (CBLVd) from citrus cultivars of Punjab, Pakistan

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Plant viruses and viroids in Japan

Cited by 17 publications

References 208 publications

TaTHI2 interacts with Ca2+‐dependent protein kinase TaCPK5 to suppress virus infection by regulating ROS accumulation

TaTHI2 interacts with Ca2+‐dependent protein kinase TaCPK5 to suppress virus infection by regulating ROS accumulation

Diverse, abundant and stable coastal RNA viruses identified by spatiotemporal metatranscriptomics

Molecular characterization of divergent isolates of Citrus bent leaf viroid (CBLVd) from citrus cultivars of Punjab, Pakistan

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TaTHI2 interacts with Ca²⁺‐dependent protein kinase TaCPK5 to suppress virus infection by regulating ROS accumulation

TaTHI2 interacts with Ca²⁺‐dependent protein kinase TaCPK5 to suppress virus infection by regulating ROS accumulation