Molecular mechanisms of ROS burst conferred by protein phosphorylation.

Yoshioka, Hirofumi; Ishihama, Nobuaki; Nakano, Takuma; Shiraishi, Yo-ichi; Miyagawa, N.; Nomura, Hironari; Yoshioka, M.; Asai, Shuji

doi:10.3186/jjphytopath.81.1

Cited by 5 publications

(2 citation statements)

References 61 publications

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“…To respond to invading pathogens, plants have evolved two cross‐talking defence cascades: pathogen‐associated molecular pattern (PAMP)‐triggered immunity (PTI), which confers basal resistance, and effector‐triggered immunity (ETI), which induces the expression of resistance ( R ) genes (Dodds and Rathjen, ). Both PTI and ETI promote the accumulation of reactive oxygen species (ROS) (Yoshioka et al ., ). For biotrophic pathogens, ETI effectively limits pathogen spread by inducing a hypersensitive response (HR) at the site of pathogen entry (Jones and Dangl, ).…”

Section: Introductionmentioning

confidence: 97%

Isochorismate‐based salicylic acid biosynthesis confers basal resistance to Fusarium graminearum in barley

Hao

Wang

Han

et al. 2018

Molecular Plant Pathology

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Salicylic acid (SA) plays an important role in signal transduction and disease resistance. In Arabidopsis, SA can be made by either of two biosynthetic branches, one involving isochorismate synthase (ICS) and the other involving phenylalanine ammonia-lyase (PAL). However, the biosynthetic pathway and the importance of SA remain largely unknown in Triticeae. Here, we cloned one ICS and seven PAL genes from barley, and studied their functions by their overexpression and suppression in that plant. Suppression of the ICS gene significantly delayed plant growth, whereas PAL genes, both overexpressed and suppressed, had no significant effect on plant growth. Similarly, suppression of ICS compromised plant resistance to Fusarium graminearum, whereas similar suppression of PAL genes had no significant effect. We then focused on transgenic plants with ICS. In a leaf-based test with F. graminearum, transgenic plants with an up-regulated ICS were comparable with wild-type control plants. By contrast, transgenic plants with a suppressed ICS lost the ability to accumulate SA during pathogen infection and were also more susceptible to Fusarium than the wild-type controls. This suggests that ICS plays a unique role in SA biosynthesis in barley, which, in turn, confers a basal resistance to F. graminearum by modulating the accumulation of H O , O2- and reactive oxygen-associated enzymatic activities. Although SA mediates systemic acquired resistance (SAR) in dicots, there was no comparable SAR response to F. graminearum in barley. This study expands our knowledge about SA biosynthesis in barley and proves that SA confers basal resistance to fungal pathogens.

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Section: Introductionmentioning

confidence: 97%

Isochorismate‐based salicylic acid biosynthesis confers basal resistance to Fusarium graminearum in barley

Hao

Wang

Han

et al. 2018

Molecular Plant Pathology

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“…P lants have evolved multi-layered molecular defense plant immune responses (Zhou et al, 2014;Yoshioka et al, 2015;Withers and Dong, 2017). In an attempt to bypass plant immune responses, phytopathogens modulate plant immunity by secreting effector enzymes that remove PTMs to directly modify host protein functions (Ma et al, 2015;Zhang et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Ustilaginoidea virens modulates lysine 2‐hydroxyisobutyrylation in rice flowers during infection

Chen

Duan

et al. 2021

JIPB

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The post-translational modification lysine 2hydroxyisobutyrylation (K hib ) plays an important role in gene transcription, metabolism, and enzymatic activity. K hib sites have been identified in rice (Oryza sativa). However, the K hib status of proteins in rice flowers during pathogen infection remains unclear. Here, we report a comprehensive identification of K hib -modified proteins in rice flowers, and the changes in these proteins during infection with the fungal pathogen Ustilaginoidea virens. By using a tandem mass tag-based quantitative proteomics approach, we identified 2,891 K hib sites on 964 proteins in rice flowers. Our data demonstrated that 2-hydroxyisobutyrylated proteins are involved in diverse biological processes. K hib levels were substantially reduced upon infection with U. virens. Chromatin immunoprecipitation polymerase chain reaction (PCR) and reverse transcription quantitative PCR analyses revealed that histone K hib is involved in the expression of disease-resistance genes. More importantly, most quantified sites on core histones H3 were downregulated upon U. virens infection. In addition, the histone deacetylases HDA705, HDA716, SRT1, and SRT2 are involved in the removal of K hib marks in rice. HDA705 was further confirmed to negatively regulate rice disease resistance to pathogens U. virens, Magnaporthe oryzae, and Xanthomonas oryzae pv. oryzae (Xoo). Our data suggest that U. virens could modulate K hib in rice flowers during infection.

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Plant viruses and viroids in Japan

et al. 2022

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An increasing number of plant viruses and viroids have been reported from all over the world due largely to metavirogenomics approaches with technological innovation. Herein, the official changes of virus taxonomy, including the establishment of megataxonomy and amendments of the codes of virus classification and nomenclature, recently made by the International Committee on Taxonomy of Viruses were summarized. The continued efforts of the plant virology community of Japan to index all plant viruses and viroids occurring in Japan, which represent 407 viruses, including 303 virus species and 104 unclassified viruses, and 25 viroids, including 20 species and 5 unclassified viroids, as of October 2021, were also introduced. These viruses and viroids are collectively classified into 81 genera within 26 families of 3 kingdoms (Shotokuvirae, Orthornavirae, Pararnavirae) across 2 realms (Monodnaviria and Riboviria). This review also overviewed how Japan’s plant virus/viroid studies have contributed to advance virus/viroid taxonomy.

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Molecular mechanisms of ROS burst conferred by protein phosphorylation.

Cited by 5 publications

References 61 publications

Isochorismate‐based salicylic acid biosynthesis confers basal resistance to Fusarium graminearum in barley

Isochorismate‐based salicylic acid biosynthesis confers basal resistance to Fusarium graminearum in barley

Ustilaginoidea virens modulates lysine 2‐hydroxyisobutyrylation in rice flowers during infection

Plant viruses and viroids in Japan

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