The Influence of End-of-Day Blue Light on the Growth, Photosynthetic, and Metabolic Parameters of Lettuce at Different Development Stages
This study evaluates the effect of end-of-day blue (EOD B) light on the physiological response of lettuce (<i>Lactuca sativa</i>, Lobjoits Green Cos) at different phenological development stages. Plants were grown in a controlled environment growth chamber (day/night temperature 21 ± 2 °...
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| Format: | Article |
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MDPI AG
2022-10-01
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| Series: | Plants |
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| Online Access: | https://www.mdpi.com/2223-7747/11/20/2798 |
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| author | Viktorija Vaštakaitė-Kairienė Giedrė Samuolienė Vaidevutis Šveikauskas Kristina Laužikė Sigita Jurkonienė |
| author_facet | Viktorija Vaštakaitė-Kairienė Giedrė Samuolienė Vaidevutis Šveikauskas Kristina Laužikė Sigita Jurkonienė |
| author_sort | Viktorija Vaštakaitė-Kairienė |
| collection | DOAJ |
| description | This study evaluates the effect of end-of-day blue (EOD B) light on the physiological response of lettuce (<i>Lactuca sativa</i>, Lobjoits Green Cos) at different phenological development stages. Plants were grown in a controlled environment growth chamber (day/night temperature 21 ± 2 °C; relative air humidity 60 ± 5%) under the light of light-emitting diodes (LEDs) consisting of 5% blue (B; 450 nm), 85% red (R; 660 nm), and 10% green (G; 530 nm) photosynthetic photon flux density (PPFD) at 200 µmol m<sup>−2</sup> s<sup>−1</sup> for 16 h d<sup>−1</sup> (BRG, control) for 8, 15, and 25 days (BBCH 12, BBCH 14, and BBCH 18, respectively). For the EOD B treatments, lettuce plants were additionally illuminated with 100% of B light at 30 and 60 µmol m<sup>−2</sup> s<sup>−1</sup> PPFD for 4 h d<sup>−1</sup> (B<sub>30</sub> and B<sub>60</sub>, respectively). The results show that EOD B light caused the elevated shoot elongation of lettuce plants regardless of their growth stages. However, leaf width increased only in more developed lettuce plants (BBCH 18). EOD B light negatively affected the development of new leaves and fresh weight, except for seedlings (BBCH 12). Most photosynthetic and spectral leaf indices also decreased when lettuce was treated with EOD B light, especially under the PPFD level of 60 µmol m<sup>−2</sup> s<sup>−1</sup>. Moreover, the changes in metabolic parameters such as DPPH free radical activity, free proline content, and H<sup>+</sup>-ATPase activity in lettuce showed a plant response to unfavorable conditions to EOD B light. |
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| institution | Directory Open Access Journal |
| issn | 2223-7747 |
| language | English |
| last_indexed | 2024-03-09T19:33:19Z |
| publishDate | 2022-10-01 |
| publisher | MDPI AG |
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| series | Plants |
| spelling | doaj.art-2199a5f0e6b94e018bc78ad038db35252023-11-24T02:05:43ZengMDPI AGPlants2223-77472022-10-011120279810.3390/plants11202798The Influence of End-of-Day Blue Light on the Growth, Photosynthetic, and Metabolic Parameters of Lettuce at Different Development StagesViktorija Vaštakaitė-Kairienė0Giedrė Samuolienė1Vaidevutis Šveikauskas2Kristina Laužikė3Sigita Jurkonienė4Lithuanian Research Centre for Agriculture and Forestry, Institute of Horticulture, Kaunas Street 30, 54333 Babtai, LithuaniaLithuanian Research Centre for Agriculture and Forestry, Institute of Horticulture, Kaunas Street 30, 54333 Babtai, LithuaniaNature Research Centre, Laboratory of Plant Physiology, Akademijos Street 2, 08412 Vilnius, LithuaniaLithuanian Research Centre for Agriculture and Forestry, Institute of Horticulture, Kaunas Street 30, 54333 Babtai, LithuaniaNature Research Centre, Laboratory of Plant Physiology, Akademijos Street 2, 08412 Vilnius, LithuaniaThis study evaluates the effect of end-of-day blue (EOD B) light on the physiological response of lettuce (<i>Lactuca sativa</i>, Lobjoits Green Cos) at different phenological development stages. Plants were grown in a controlled environment growth chamber (day/night temperature 21 ± 2 °C; relative air humidity 60 ± 5%) under the light of light-emitting diodes (LEDs) consisting of 5% blue (B; 450 nm), 85% red (R; 660 nm), and 10% green (G; 530 nm) photosynthetic photon flux density (PPFD) at 200 µmol m<sup>−2</sup> s<sup>−1</sup> for 16 h d<sup>−1</sup> (BRG, control) for 8, 15, and 25 days (BBCH 12, BBCH 14, and BBCH 18, respectively). For the EOD B treatments, lettuce plants were additionally illuminated with 100% of B light at 30 and 60 µmol m<sup>−2</sup> s<sup>−1</sup> PPFD for 4 h d<sup>−1</sup> (B<sub>30</sub> and B<sub>60</sub>, respectively). The results show that EOD B light caused the elevated shoot elongation of lettuce plants regardless of their growth stages. However, leaf width increased only in more developed lettuce plants (BBCH 18). EOD B light negatively affected the development of new leaves and fresh weight, except for seedlings (BBCH 12). Most photosynthetic and spectral leaf indices also decreased when lettuce was treated with EOD B light, especially under the PPFD level of 60 µmol m<sup>−2</sup> s<sup>−1</sup>. Moreover, the changes in metabolic parameters such as DPPH free radical activity, free proline content, and H<sup>+</sup>-ATPase activity in lettuce showed a plant response to unfavorable conditions to EOD B light.https://www.mdpi.com/2223-7747/11/20/2798controlled environment agriculturelight-emitting diodesphysiological responsemetabolites |
| spellingShingle | Viktorija Vaštakaitė-Kairienė Giedrė Samuolienė Vaidevutis Šveikauskas Kristina Laužikė Sigita Jurkonienė The Influence of End-of-Day Blue Light on the Growth, Photosynthetic, and Metabolic Parameters of Lettuce at Different Development Stages Plants controlled environment agriculture light-emitting diodes physiological response metabolites |
| title | The Influence of End-of-Day Blue Light on the Growth, Photosynthetic, and Metabolic Parameters of Lettuce at Different Development Stages |
| title_full | The Influence of End-of-Day Blue Light on the Growth, Photosynthetic, and Metabolic Parameters of Lettuce at Different Development Stages |
| title_fullStr | The Influence of End-of-Day Blue Light on the Growth, Photosynthetic, and Metabolic Parameters of Lettuce at Different Development Stages |
| title_full_unstemmed | The Influence of End-of-Day Blue Light on the Growth, Photosynthetic, and Metabolic Parameters of Lettuce at Different Development Stages |
| title_short | The Influence of End-of-Day Blue Light on the Growth, Photosynthetic, and Metabolic Parameters of Lettuce at Different Development Stages |
| title_sort | influence of end of day blue light on the growth photosynthetic and metabolic parameters of lettuce at different development stages |
| topic | controlled environment agriculture light-emitting diodes physiological response metabolites |
| url | https://www.mdpi.com/2223-7747/11/20/2798 |
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