Physiological Responses of Tomato and Cucumber Seedlings under Different Light–Dark Cycles
Tomato and cucumber seedlings were grown in a growth chamber to evaluate the effects of different cycles of light–dark exposure conditions (T<sub>0</sub> (control treatment) (1 cycle of 24 h distributed in 18 h of light exposure and six hours of dark), T<sub>1</sub> (two cycl...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-07-01
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| Series: | Agronomy |
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| Online Access: | https://www.mdpi.com/2073-4395/10/7/945 |
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| author | Pedro García-Caparrós Francisco Sabio Francisco Javier Barbero Rosa María Chica María Teresa Lao |
| author_facet | Pedro García-Caparrós Francisco Sabio Francisco Javier Barbero Rosa María Chica María Teresa Lao |
| author_sort | Pedro García-Caparrós |
| collection | DOAJ |
| description | Tomato and cucumber seedlings were grown in a growth chamber to evaluate the effects of different cycles of light–dark exposure conditions (T<sub>0</sub> (control treatment) (1 cycle of 24 h distributed in 18 h of light exposure and six hours of dark), T<sub>1</sub> (two cycles of 12 h distributed in nine hours of light exposure and three hours of dark) and T<sub>2</sub> (three cycles of eight hours distributed in six hours of light exposure and two hours of dark) on growth, nutrient status, pigment concentration and physiological changes. Total dry weight showed different behaviors in both species, since in tomato the total dry weight remained unchanged under varying light–dark cycles, whereas in cucumber seedlings there was a clear decrease compared to the control treatment. In both species, plants grown under T<sub>2</sub> showed the best water content. Nitrogen, P and K content—as well as partitioning in the different organs of the plants—displayed different patterns under varying cycles of light–dark conditions in both species. Chlorophyll (b and a + b) concentration decreased significantly in both species in T<sub>1</sub> and T<sub>2</sub> compared to the control treatment (T<sub>0</sub>). At physiological level, the concentration of total soluble sugars and proline in leaf showed the highest value in the control treatment with 18 h of light and six hours of dark. |
| first_indexed | 2024-03-10T18:45:19Z |
| format | Article |
| id | doaj.art-358fb653952c4869b2cee643e9e19e1e |
| institution | Directory Open Access Journal |
| issn | 2073-4395 |
| language | English |
| last_indexed | 2024-03-10T18:45:19Z |
| publishDate | 2020-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Agronomy |
| spelling | doaj.art-358fb653952c4869b2cee643e9e19e1e2023-11-20T05:31:02ZengMDPI AGAgronomy2073-43952020-07-0110794510.3390/agronomy10070945Physiological Responses of Tomato and Cucumber Seedlings under Different Light–Dark CyclesPedro García-Caparrós0Francisco Sabio1Francisco Javier Barbero2Rosa María Chica3María Teresa Lao4Agronomy Department of Superior School Engineering, University of Almeria, CIAIMBITAL, Agrifood Campus of International Excellence ceiA3. Ctra. Sacramento s/n, La Cañada de San Urbano, 04120 Almería, SpainAgronomy Department of Superior School Engineering, University of Almeria, CIAIMBITAL, Agrifood Campus of International Excellence ceiA3. Ctra. Sacramento s/n, La Cañada de San Urbano, 04120 Almería, SpainChemistry and Physics Department of Superior School Engineering, University of Almería, CIAIMBITAL, Agrifood Campus of International Excellence ceiA3, Ctra. Sacramento s/n, La Cañada de San Urbano, 04120 Almería, SpainEngineering Department of Superior School Engineering, University of Almería, CIAIMBITAL, Agrifood Campus of International Excellence ceiA3, Ctra. Sacramento s/n, La Cañada de San Urbano, 04120 Almería, SpainAgronomy Department of Superior School Engineering, University of Almeria, CIAIMBITAL, Agrifood Campus of International Excellence ceiA3. Ctra. Sacramento s/n, La Cañada de San Urbano, 04120 Almería, SpainTomato and cucumber seedlings were grown in a growth chamber to evaluate the effects of different cycles of light–dark exposure conditions (T<sub>0</sub> (control treatment) (1 cycle of 24 h distributed in 18 h of light exposure and six hours of dark), T<sub>1</sub> (two cycles of 12 h distributed in nine hours of light exposure and three hours of dark) and T<sub>2</sub> (three cycles of eight hours distributed in six hours of light exposure and two hours of dark) on growth, nutrient status, pigment concentration and physiological changes. Total dry weight showed different behaviors in both species, since in tomato the total dry weight remained unchanged under varying light–dark cycles, whereas in cucumber seedlings there was a clear decrease compared to the control treatment. In both species, plants grown under T<sub>2</sub> showed the best water content. Nitrogen, P and K content—as well as partitioning in the different organs of the plants—displayed different patterns under varying cycles of light–dark conditions in both species. Chlorophyll (b and a + b) concentration decreased significantly in both species in T<sub>1</sub> and T<sub>2</sub> compared to the control treatment (T<sub>0</sub>). At physiological level, the concentration of total soluble sugars and proline in leaf showed the highest value in the control treatment with 18 h of light and six hours of dark.https://www.mdpi.com/2073-4395/10/7/945biomasschlorophyllLEDs lampprolinenutrient statustotal soluble sugars |
| spellingShingle | Pedro García-Caparrós Francisco Sabio Francisco Javier Barbero Rosa María Chica María Teresa Lao Physiological Responses of Tomato and Cucumber Seedlings under Different Light–Dark Cycles Agronomy biomass chlorophyll LEDs lamp proline nutrient status total soluble sugars |
| title | Physiological Responses of Tomato and Cucumber Seedlings under Different Light–Dark Cycles |
| title_full | Physiological Responses of Tomato and Cucumber Seedlings under Different Light–Dark Cycles |
| title_fullStr | Physiological Responses of Tomato and Cucumber Seedlings under Different Light–Dark Cycles |
| title_full_unstemmed | Physiological Responses of Tomato and Cucumber Seedlings under Different Light–Dark Cycles |
| title_short | Physiological Responses of Tomato and Cucumber Seedlings under Different Light–Dark Cycles |
| title_sort | physiological responses of tomato and cucumber seedlings under different light dark cycles |
| topic | biomass chlorophyll LEDs lamp proline nutrient status total soluble sugars |
| url | https://www.mdpi.com/2073-4395/10/7/945 |
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