Photosynthetic Responses of Freshwater Macrophytes to the Daily Light Cycle in Songkhla Lagoon
Macrophytes play an important role in the freshwater ecosystem. However, human activities and climate change are currently affecting aquatic lakes and species in various ways. The heterogeneity of macrophyte ecophysiology might lead to different responses to changing environments. To understand the...
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| Format: | Article |
| Language: | English |
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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/2223-7747/11/21/2806 |
| _version_ | 1797466790158139392 |
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| author | Ponlachart Chotikarn Pathompong Pramneechote Sutinee Sinutok |
| author_facet | Ponlachart Chotikarn Pathompong Pramneechote Sutinee Sinutok |
| author_sort | Ponlachart Chotikarn |
| collection | DOAJ |
| description | Macrophytes play an important role in the freshwater ecosystem. However, human activities and climate change are currently affecting aquatic lakes and species in various ways. The heterogeneity of macrophyte ecophysiology might lead to different responses to changing environments. To understand the photosynthetic responses of freshwater macrophytes to changes in light, six freshwater macrophyte species from Songkhla Lagoon were investigated. The results showed that there was a diurnal response of photosynthetic activities in all species. The F<sub>v</sub>/F<sub>m</sub> and ∆F/F<sub>m<sub>′</sub></sub> of all species decreased at midday (9 a.m.–3 p.m.) then recovered at 6 p.m. close to the 6 a.m. level. As well as alpha, the positive relation between alpha and light showed the adaptation of plants. The saturating irradiance (I<sub>k</sub>) revealed that plants from different light regimes showed different responses to light and temperature changes. To maintain a positive carbon balance and cope with light and temperature conditions, macrophytes had strategies such as modifying light harvesting capacity and light use. This study provides a better understanding of the vulnerability of each species to environmental changes and photosynthetic responses that enable species from different light regime to adapt to changing light environments. |
| first_indexed | 2024-03-09T18:43:43Z |
| format | Article |
| id | doaj.art-0c50a0a94ec740dbbb5059f60e2f206b |
| institution | Directory Open Access Journal |
| issn | 2223-7747 |
| language | English |
| last_indexed | 2024-03-09T18:43:43Z |
| publishDate | 2022-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Plants |
| spelling | doaj.art-0c50a0a94ec740dbbb5059f60e2f206b2023-11-24T06:23:22ZengMDPI AGPlants2223-77472022-10-011121280610.3390/plants11212806Photosynthetic Responses of Freshwater Macrophytes to the Daily Light Cycle in Songkhla LagoonPonlachart Chotikarn0Pathompong Pramneechote1Sutinee Sinutok2Marine and Coastal Resources Institute, Faculty of Environmental Management, Prince of Songkla University, Songkhla 90110, ThailandMarine and Coastal Resources Institute, Faculty of Environmental Management, Prince of Songkla University, Songkhla 90110, ThailandFaculty of Environmental Management, Prince of Songkla University, Songkhla 90110, ThailandMacrophytes play an important role in the freshwater ecosystem. However, human activities and climate change are currently affecting aquatic lakes and species in various ways. The heterogeneity of macrophyte ecophysiology might lead to different responses to changing environments. To understand the photosynthetic responses of freshwater macrophytes to changes in light, six freshwater macrophyte species from Songkhla Lagoon were investigated. The results showed that there was a diurnal response of photosynthetic activities in all species. The F<sub>v</sub>/F<sub>m</sub> and ∆F/F<sub>m<sub>′</sub></sub> of all species decreased at midday (9 a.m.–3 p.m.) then recovered at 6 p.m. close to the 6 a.m. level. As well as alpha, the positive relation between alpha and light showed the adaptation of plants. The saturating irradiance (I<sub>k</sub>) revealed that plants from different light regimes showed different responses to light and temperature changes. To maintain a positive carbon balance and cope with light and temperature conditions, macrophytes had strategies such as modifying light harvesting capacity and light use. This study provides a better understanding of the vulnerability of each species to environmental changes and photosynthetic responses that enable species from different light regime to adapt to changing light environments.https://www.mdpi.com/2223-7747/11/21/2806macrophytesphotosynthesisrapid light curvesSongkhla Lagoon |
| spellingShingle | Ponlachart Chotikarn Pathompong Pramneechote Sutinee Sinutok Photosynthetic Responses of Freshwater Macrophytes to the Daily Light Cycle in Songkhla Lagoon Plants macrophytes photosynthesis rapid light curves Songkhla Lagoon |
| title | Photosynthetic Responses of Freshwater Macrophytes to the Daily Light Cycle in Songkhla Lagoon |
| title_full | Photosynthetic Responses of Freshwater Macrophytes to the Daily Light Cycle in Songkhla Lagoon |
| title_fullStr | Photosynthetic Responses of Freshwater Macrophytes to the Daily Light Cycle in Songkhla Lagoon |
| title_full_unstemmed | Photosynthetic Responses of Freshwater Macrophytes to the Daily Light Cycle in Songkhla Lagoon |
| title_short | Photosynthetic Responses of Freshwater Macrophytes to the Daily Light Cycle in Songkhla Lagoon |
| title_sort | photosynthetic responses of freshwater macrophytes to the daily light cycle in songkhla lagoon |
| topic | macrophytes photosynthesis rapid light curves Songkhla Lagoon |
| url | https://www.mdpi.com/2223-7747/11/21/2806 |
| work_keys_str_mv | AT ponlachartchotikarn photosyntheticresponsesoffreshwatermacrophytestothedailylightcycleinsongkhlalagoon AT pathompongpramneechote photosyntheticresponsesoffreshwatermacrophytestothedailylightcycleinsongkhlalagoon AT sutineesinutok photosyntheticresponsesoffreshwatermacrophytestothedailylightcycleinsongkhlalagoon |