Flashes of UV-C light: An innovative method for stimulating plant defences.
Leaves of lettuce, pepper, tomato and grapevine plants grown in greenhouse conditions were exposed to UV-C light for either 60 s or 1 s, using a specific LEDs-based device, and wavelengths and energy were the same among different light treatments. Doses of UV-C light that both effectively stimulated...
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Public Library of Science (PLoS)
2020-01-01
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| Series: | PLoS ONE |
| Online Access: | https://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0235918&type=printable |
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| author | Jawad Aarrouf Laurent Urban |
| author_facet | Jawad Aarrouf Laurent Urban |
| author_sort | Jawad Aarrouf |
| collection | DOAJ |
| description | Leaves of lettuce, pepper, tomato and grapevine plants grown in greenhouse conditions were exposed to UV-C light for either 60 s or 1 s, using a specific LEDs-based device, and wavelengths and energy were the same among different light treatments. Doses of UV-C light that both effectively stimulated plant defences and were innocuous were determined beforehand. Tomato plants and lettuce plants were inoculated with Botrytis cinerea, pepper plants with Phytophthora capsici, and grapevine with Plasmopara viticola. In some experiments we investigated the effect of a repetition of treatments over periods of several days. All plants were inoculated 48 h after exposure to the last UV-C treatment. Lesions on surfaces were measured up to 12 days after inoculation, depending on the experiment and the pathogen. The results confirmed that UV-C light stimulates plant resistance; they show that irradiation for one second is more effective than irradiation for 60 s, and that repetition of treatments is more effective than single light treatments. Moreover a systemic effect was observed in unexposed leaves that were close to exposed leaves. The mechanisms of perception and of the signalling and metabolic pathways triggered by flashes of UV-C light vs. 60 s irradiation exposures are briefly discussed, as well as the prospects for field use of UV-C flashes in viticulture and horticulture. |
| format | Article |
| id | doaj-art-41c48afe27cc47b4bafb01fbf29f70b7 |
| institution | OA Journals |
| issn | 1932-6203 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Public Library of Science (PLoS) |
| record_format | Article |
| series | PLoS ONE |
| spelling | doaj-art-41c48afe27cc47b4bafb01fbf29f70b72025-08-20T02:00:38ZengPublic Library of Science (PLoS)PLoS ONE1932-62032020-01-01157e023591810.1371/journal.pone.0235918Flashes of UV-C light: An innovative method for stimulating plant defences.Jawad AarroufLaurent UrbanLeaves of lettuce, pepper, tomato and grapevine plants grown in greenhouse conditions were exposed to UV-C light for either 60 s or 1 s, using a specific LEDs-based device, and wavelengths and energy were the same among different light treatments. Doses of UV-C light that both effectively stimulated plant defences and were innocuous were determined beforehand. Tomato plants and lettuce plants were inoculated with Botrytis cinerea, pepper plants with Phytophthora capsici, and grapevine with Plasmopara viticola. In some experiments we investigated the effect of a repetition of treatments over periods of several days. All plants were inoculated 48 h after exposure to the last UV-C treatment. Lesions on surfaces were measured up to 12 days after inoculation, depending on the experiment and the pathogen. The results confirmed that UV-C light stimulates plant resistance; they show that irradiation for one second is more effective than irradiation for 60 s, and that repetition of treatments is more effective than single light treatments. Moreover a systemic effect was observed in unexposed leaves that were close to exposed leaves. The mechanisms of perception and of the signalling and metabolic pathways triggered by flashes of UV-C light vs. 60 s irradiation exposures are briefly discussed, as well as the prospects for field use of UV-C flashes in viticulture and horticulture.https://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0235918&type=printable |
| spellingShingle | Jawad Aarrouf Laurent Urban Flashes of UV-C light: An innovative method for stimulating plant defences. PLoS ONE |
| title | Flashes of UV-C light: An innovative method for stimulating plant defences. |
| title_full | Flashes of UV-C light: An innovative method for stimulating plant defences. |
| title_fullStr | Flashes of UV-C light: An innovative method for stimulating plant defences. |
| title_full_unstemmed | Flashes of UV-C light: An innovative method for stimulating plant defences. |
| title_short | Flashes of UV-C light: An innovative method for stimulating plant defences. |
| title_sort | flashes of uv c light an innovative method for stimulating plant defences |
| url | https://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0235918&type=printable |
| work_keys_str_mv | AT jawadaarrouf flashesofuvclightaninnovativemethodforstimulatingplantdefences AT laurenturban flashesofuvclightaninnovativemethodforstimulatingplantdefences |