Suppression of <i>Tomato mosaic virus</i> disease in tomato plants by deep ultraviolet irradiation using light-emitting diodes

Matsuura, S.; Ishikura, Satoshi

doi:10.1111/lam.12301

Cited by 25 publications

(20 citation statements)

References 15 publications

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“…In the present study, the degree of rice leaf blight was significantly lower in the M. → UV-B treatment group than in the M. treatment group, although the OsLOX2 gene expression in the former was lower than that in the latter. This result indicated that the UV-B radiation supplied after M. oryzae inoculation did not aggravate leaf blight possibly because UV-B radiation slows down disease progression, inhibits the expansion of lesions, and weakens the growth of pathogens (Matsuura and Ishikura 2014). No significant difference was found between the PR contents in the M. → UV-B and M. treatment groups, indicating that UV-B radiation did not increase stress tolerance of M. oryzae-infected leaves.…”

Section: Discussionmentioning

confidence: 84%

Resistance-related physiological response of rice leaves to the compound stress of enhanced UV-B radiation and Magnaporthe oryzae

Zhan

et al. 2018

Journal of Plant Interactions

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An enhanced UV-B radiation (5.0 kJ m −2) was supplied before, during, and after Magnaporthe oryzae infection. The effects of single and compound stress of the UV-B radiation and M. oryzae on the resistance physiology and gene expression of rice leaves were examined. Results revealed that UV-B radiation given before M. oryzae infection (UV-B → M.) significantly increased the pathogenesisrelated proteins (PRs) activities of phenylalanine ammonialyase (PAL), lipoxygenase (LOX), chitinase (CHT), and β-1,3-glucanase, the resistance-related substances (flavonoids and total phenols) content, and resistance-related genes (OsPAL and OsCHT) expression, thereby improving the disease resistance of rice leaves. Simultaneous exposure to UV-B radiation and M. oryzae (UV-B/M.) significantly increased the OsLOX2 expression and the PRs activities. Exposure to UV-B radiation after M. oryzae infection (M. → UV-B) decreased the flavonoid content, did not improve the PRs activity, and increased OsLOX2 expression. Compound treatments of UV-B → M., UV-B/M., and M. → UV-B reduced the disease index by 62.3%, 40.2%, and 26.6%, respectively, indicating UV-B radiation inhibited the occurrence of M. oryzae disease, but its inhibitory effect weakened when it was provided after M. oryzae infection. Hence, rice responded to the compound stress of UV-B radiation and M. oryzae through a resistance-related physiological mechanism associated with the sequence of stress occurrence.

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Section: Discussionmentioning

confidence: 84%

Resistance-related physiological response of rice leaves to the compound stress of enhanced UV-B radiation and Magnaporthe oryzae

Zhan

et al. 2018

Journal of Plant Interactions

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“…Furthermore, Demkura and Ballaré (2012) reported that UVR8 plays a key role in mediating the effects of UV-B radiation on pathogenicity by controlling expression of the sinapate biosynthetic pathway. Inactivation of pathogens by exposure to UV light is a well-known method of crop protection (Demkura and Ballaré 2012;Matsuura and Ishikura 2014;Nigro et al 1998). However, irradiation with UV light has limited applications because of its harmful effects on workers, such as injury to the skin or eye upon direct exposure (Young 2006).…”

Section: Discussionmentioning

confidence: 99%

Inhibition of Botrytis cinerea and accumulation of stilbene compounds by light-emitting diodes of grapevine leaves and differential expression of defense-related genes

2015

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Grey mold (Botrytis cinerea) is one of the most common diseases to attack grapes, causing serious damage during grape production. In the present study, the effects of light-emitting diodes (LED) on the suppression of fungal growth, defense related gene expression and accumulation of stilbenic compounds were investigated. Irradiation with blue and red light inhibited lesion development relative to fluorescent light in detached leaves. Treatment of detached leaves with LED light, especially blue and red, resulted in accumulation of stilbenic compounds and differential expression of genes involved in defense response. Among five stilbenic compounds, concentrations of trans-and cispiceid were higher than those of trans-and cis-resveratrol, as well as piceatannol in both 'Campbell Early' and 'Kyoho' leaves treated with blue and red light. The gene expression of beta-1,3 glucanase (Glu), osmotin (OSM), pathogen-related protein 4a (PR4a), protease inhibitorlike protein (PILP), thaumatin-like protein (TLP), glutathione-S-transferase (GST), phenylalanine ammonialyase (PAL), chalcone synthase (CHS), and stilbene synthase (STS) were highly upregulated under blue and red LED light. The results reported here will facilitate development of alternative methods to enhance the accumulation of resveratrol compound and protect grapevine from fungal pathogen infections.

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“…Suthaparan et al (2012) found a significant reduction in disease severity and conidial production of rose powdery mildew after UV irradiation that included wavelengths below 290 nm, but not when these wavelengths were filtered out by cellulose diacetate foil, indicating a possible role of UV-B wavelengths between 280 and 290 nm in not only eliciting defensive responses in plants, but also suppressing spore production of the fungus P. pannosa. Interestingly, Matsuura and Ishikura (2014)…”

Section: Discussionmentioning

confidence: 99%

“…pannosa . Interestingly, Matsuura and Ishikura (2014) reported that infection of tomato mosaic virus was suppressed in tomato plants by irradiating with narrow‐band LED UV‐B (280–290 nm). In future experiments, application of LED UV‐B could eliminate UV‐C wavelengths to evaluate more precisely the effects of UV‐B irradiation on induction of host resistance and on the direct suppression of fungal pathogens.…”

Section: Discussionmentioning

confidence: 99%

Up‐regulation of pathogenesis‐related genes in strawberry leaves treated with powdery mildew‐suppressing ultraviolet irradiation

Ota

Nishimura²,

Mori³

et al. 2021

Plant Pathology

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Strawberry powdery mildew caused by Podosphaera aphanis, one of the most important diseases affecting strawberry production in Japan, can be effectively controlled by supplemental ultraviolet (UV) irradiation. Here, we investigated disease severity on plants irradiated with UV light at 270-380 nm with/without inoculation and demonstrated significant decreases in disease severity on the UV-treated plants throughout almost all of the experiment periods. Daily UV irradiation for 3 hr (0.17-0.96 kJ ⋅m −2 ⋅day −1 ) significantly reduced the incidence of powdery mildew on UV-treated strawberry at day 58 after initiation of UV irradiation in a natural infection and at day 168 in artificial inoculation tests compared with non-UV-treated controls. Furthermore, we found that two pathogenesis-related protein (PR) genes were up-regulated 7 days after initiation of UV irradiation on plants before or after transplantation into raised beds. Transcript levels of five defence-response genes were estimated using quantitative reverse transcription PCR to determine whether UV irradiation induced a defence response; PR-3 and PR-5 transcripts were significantly higher in the UV-treated strawberry leaves after UV irradiation than in the non-irradiated controls. In addition, transcript levels of both genes were significantly up-regulated in plants irradiated with a higher radiant dose (0.90-0.96 kJ ⋅m −2 ⋅day −1 ) within 7 days after initiation of UV treatment, compared with plants exposed to a lower dose (0.17 kJ ⋅m −2 ⋅day −1 ) and with controls. Thus, PR-3 and PR-5 are induced in strawberry leaves as part of a defence response that is induced by UV irradiation.

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Suppression of Tomato mosaic virus disease in tomato plants by deep ultraviolet irradiation using light-emitting diodes

Abstract: Disease caused in tomato plants by resistance-breaking Tomato mosaic virus (ToMV) could be suppressed by ultraviolet (UV)-B irradiation using light-emitting diodes (LEDs). This paves the way for the future management of plant viral diseases using deep UV LEDs.

Cited by 25 publications

References 15 publications

Resistance-related physiological response of rice leaves to the compound stress of enhanced UV-B radiation and Magnaporthe oryzae

Resistance-related physiological response of rice leaves to the compound stress of enhanced UV-B radiation and Magnaporthe oryzae

Inhibition of Botrytis cinerea and accumulation of stilbene compounds by light-emitting diodes of grapevine leaves and differential expression of defense-related genes

Up‐regulation of pathogenesis‐related genes in strawberry leaves treated with powdery mildew‐suppressing ultraviolet irradiation

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