The Photosynthetic Performance of Red Leaf Lettuce under UV-A Irradiation
The objective of this study was to evaluate how different UV-A wavelengths influence the morphology and photosynthetic behavior of red-leaf lettuce (<i>Lactuca sativa</i> L. cv. Maiko). In the experiments, the main photosynthetic photon flux consisted of red (R) and blue (B) light, suppl...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-05-01
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| Series: | Agronomy |
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| Online Access: | https://www.mdpi.com/2073-4395/10/6/761 |
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| author | Giedre Samuoliene Akvile Virsile Jurga Miliauskienė Perttu Haimi Kristina Laužikė Julė Jankauskienė Algirdas Novičkovas Asta Kupčinskienė Aušra Brazaitytė |
| author_facet | Giedre Samuoliene Akvile Virsile Jurga Miliauskienė Perttu Haimi Kristina Laužikė Julė Jankauskienė Algirdas Novičkovas Asta Kupčinskienė Aušra Brazaitytė |
| author_sort | Giedre Samuoliene |
| collection | DOAJ |
| description | The objective of this study was to evaluate how different UV-A wavelengths influence the morphology and photosynthetic behavior of red-leaf lettuce (<i>Lactuca sativa</i> L. cv. Maiko). In the experiments, the main photosynthetic photon flux consisted of red (R) and blue (B) light, supplemented with equal doses of different UV-A wavelengths (402, 387 and 367 nm). Treating the crops with low dosages of specific narrow-band UV-A radiation at key points in the life cycle initiated a cascade of responses in the above-ground biomass. According to the results, red-leaf lettuces acclimated to longer UV-A wavelengths by increasing biomass production, whereas different UV-A wavelengths had no significant effect on plant senescence reflectance, nor on the normalized difference vegetation index. A significant decrease in the maximum quantum yield of the PSII photochemistry of dark (Fv/Fm) and light (Φ<sub>PSII</sub>) adapted plants was observed. A lack of significant changes in non-photochemical fluorescence quenching indicates that photo-inhibition occurred under RBUV367, whereas the photosynthetic response under RB, RBUV402, and RBUV387 suggests that there was no damage to PSII. The correlation of the photosynthetic rate (Pr) with the stomatal conductance (gs) indicated that the increase in the Pr of lettuce under supplemental UV-A radiation was due to the increase of gs, instead of the ratio of the intracellular to ambient CO<sub>2</sub> content (C<sub>i</sub>/C<sub>a</sub>) or stomatal limitations. |
| first_indexed | 2024-03-10T19:33:43Z |
| format | Article |
| id | doaj.art-6ce70b1b027b4b9481f1c80084905b96 |
| institution | Directory Open Access Journal |
| issn | 2073-4395 |
| language | English |
| last_indexed | 2024-03-10T19:33:43Z |
| publishDate | 2020-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Agronomy |
| spelling | doaj.art-6ce70b1b027b4b9481f1c80084905b962023-11-20T01:53:58ZengMDPI AGAgronomy2073-43952020-05-0110676110.3390/agronomy10060761The Photosynthetic Performance of Red Leaf Lettuce under UV-A IrradiationGiedre Samuoliene0Akvile Virsile1Jurga Miliauskienė2Perttu Haimi3Kristina Laužikė4Julė Jankauskienė5Algirdas Novičkovas6Asta Kupčinskienė7Aušra Brazaitytė8Institute of Horticulture, Lithuanian Research Centre for Agriculture and Forestry, Kaunas str. 30, Kedainiai 58344, LithuaniaInstitute of Horticulture, Lithuanian Research Centre for Agriculture and Forestry, Kaunas str. 30, Kedainiai 58344, LithuaniaInstitute of Horticulture, Lithuanian Research Centre for Agriculture and Forestry, Kaunas str. 30, Kedainiai 58344, LithuaniaInstitute of Horticulture, Lithuanian Research Centre for Agriculture and Forestry, Kaunas str. 30, Kedainiai 58344, LithuaniaInstitute of Horticulture, Lithuanian Research Centre for Agriculture and Forestry, Kaunas str. 30, Kedainiai 58344, LithuaniaInstitute of Horticulture, Lithuanian Research Centre for Agriculture and Forestry, Kaunas str. 30, Kedainiai 58344, LithuaniaInstitute of Horticulture, Lithuanian Research Centre for Agriculture and Forestry, Kaunas str. 30, Kedainiai 58344, LithuaniaInstitute of Horticulture, Lithuanian Research Centre for Agriculture and Forestry, Kaunas str. 30, Kedainiai 58344, LithuaniaInstitute of Horticulture, Lithuanian Research Centre for Agriculture and Forestry, Kaunas str. 30, Kedainiai 58344, LithuaniaThe objective of this study was to evaluate how different UV-A wavelengths influence the morphology and photosynthetic behavior of red-leaf lettuce (<i>Lactuca sativa</i> L. cv. Maiko). In the experiments, the main photosynthetic photon flux consisted of red (R) and blue (B) light, supplemented with equal doses of different UV-A wavelengths (402, 387 and 367 nm). Treating the crops with low dosages of specific narrow-band UV-A radiation at key points in the life cycle initiated a cascade of responses in the above-ground biomass. According to the results, red-leaf lettuces acclimated to longer UV-A wavelengths by increasing biomass production, whereas different UV-A wavelengths had no significant effect on plant senescence reflectance, nor on the normalized difference vegetation index. A significant decrease in the maximum quantum yield of the PSII photochemistry of dark (Fv/Fm) and light (Φ<sub>PSII</sub>) adapted plants was observed. A lack of significant changes in non-photochemical fluorescence quenching indicates that photo-inhibition occurred under RBUV367, whereas the photosynthetic response under RB, RBUV402, and RBUV387 suggests that there was no damage to PSII. The correlation of the photosynthetic rate (Pr) with the stomatal conductance (gs) indicated that the increase in the Pr of lettuce under supplemental UV-A radiation was due to the increase of gs, instead of the ratio of the intracellular to ambient CO<sub>2</sub> content (C<sub>i</sub>/C<sub>a</sub>) or stomatal limitations.https://www.mdpi.com/2073-4395/10/6/761controlled environmentmorphologyphotosynthesis |
| spellingShingle | Giedre Samuoliene Akvile Virsile Jurga Miliauskienė Perttu Haimi Kristina Laužikė Julė Jankauskienė Algirdas Novičkovas Asta Kupčinskienė Aušra Brazaitytė The Photosynthetic Performance of Red Leaf Lettuce under UV-A Irradiation Agronomy controlled environment morphology photosynthesis |
| title | The Photosynthetic Performance of Red Leaf Lettuce under UV-A Irradiation |
| title_full | The Photosynthetic Performance of Red Leaf Lettuce under UV-A Irradiation |
| title_fullStr | The Photosynthetic Performance of Red Leaf Lettuce under UV-A Irradiation |
| title_full_unstemmed | The Photosynthetic Performance of Red Leaf Lettuce under UV-A Irradiation |
| title_short | The Photosynthetic Performance of Red Leaf Lettuce under UV-A Irradiation |
| title_sort | photosynthetic performance of red leaf lettuce under uv a irradiation |
| topic | controlled environment morphology photosynthesis |
| url | https://www.mdpi.com/2073-4395/10/6/761 |
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