Excess energy and photosynthesis: responses to seasonal water limitations in co-occurring woody encroachers of the semi-arid Southern Great Plains
Woody plant areal encroachment is pervasive throughout the Southern Great Plains, USA. The ability of woody plants to dissipate excess solar radiation - dynamically over the day and sustained periods without recovery overnight -is key for maintaining photosynthetic performance during dry stretches,...
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| Format: | Article |
| Language: | English |
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Academy of Sciences of the Czech Republic, Institute of Experimental Botany
2023-10-01
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| Series: | Photosynthetica |
| Subjects: | |
| Online Access: | https://ps.ueb.cas.cz/artkey/phs-202303-0003_excess-energy-and-photosynthesis-responses-to-seasonal-water-limitations-in-co-occurring-woody-encroachers-of.php |
| _version_ | 1797664617858596864 |
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| author | H.D. RAUB N. RAJAN K.J. MCINNES J.B. WEST |
| author_facet | H.D. RAUB N. RAJAN K.J. MCINNES J.B. WEST |
| author_sort | H.D. RAUB |
| collection | DOAJ |
| description | Woody plant areal encroachment is pervasive throughout the Southern Great Plains, USA. The ability of woody plants to dissipate excess solar radiation - dynamically over the day and sustained periods without recovery overnight -is key for maintaining photosynthetic performance during dry stretches, but our understanding of these processes remains incomplete. Photosynthetic performance and energy dissipation were assessed for co-occurring encroachers on the karst Edwards Plateau (Juniperus ashei, Prosopis glandulosa, and Quercus fusiformis) under seasonal changes in water status. Only J. ashei experienced mild photoinhibition from sustained energy dissipation overnight while experiencing the lowest photochemical yields, minimal photosynthetic rates, and the highest dynamic energy dissipation rates at midday during the dry period - indicating susceptibility to photosynthetic downregulation and increased dissipation under future drought regimes. Neither other encroacher experienced sustained energy dissipation in the dry period, though P. glandulosa did experience marked reductions in photosynthesis, photochemical yields, and increased regulatory dynamic energy dissipation. |
| first_indexed | 2024-03-11T19:31:57Z |
| format | Article |
| id | doaj.art-8c6ea6f05dcf4d1aa137736674f41108 |
| institution | Directory Open Access Journal |
| issn | 0300-3604 1573-9058 |
| language | English |
| last_indexed | 2024-03-11T19:31:57Z |
| publishDate | 2023-10-01 |
| publisher | Academy of Sciences of the Czech Republic, Institute of Experimental Botany |
| record_format | Article |
| series | Photosynthetica |
| spelling | doaj.art-8c6ea6f05dcf4d1aa137736674f411082023-10-06T13:16:48ZengAcademy of Sciences of the Czech Republic, Institute of Experimental BotanyPhotosynthetica0300-36041573-90582023-10-0161328529610.32615/ps.2023.018phs-202303-0003Excess energy and photosynthesis: responses to seasonal water limitations in co-occurring woody encroachers of the semi-arid Southern Great PlainsH.D. RAUB0N. RAJAN1K.J. MCINNES2J.B. WEST3Department of Ecology and Conservation Biology, Texas A&M University, College Station, TX 77843, USADepartment of Soil and Crop Sciences, Texas A&M University, College Station, TX 77843, USADepartment of Soil and Crop Sciences, Texas A&M University, College Station, TX 77843, USADepartment of Ecology and Conservation Biology, Texas A&M University, College Station, TX 77843, USAWoody plant areal encroachment is pervasive throughout the Southern Great Plains, USA. The ability of woody plants to dissipate excess solar radiation - dynamically over the day and sustained periods without recovery overnight -is key for maintaining photosynthetic performance during dry stretches, but our understanding of these processes remains incomplete. Photosynthetic performance and energy dissipation were assessed for co-occurring encroachers on the karst Edwards Plateau (Juniperus ashei, Prosopis glandulosa, and Quercus fusiformis) under seasonal changes in water status. Only J. ashei experienced mild photoinhibition from sustained energy dissipation overnight while experiencing the lowest photochemical yields, minimal photosynthetic rates, and the highest dynamic energy dissipation rates at midday during the dry period - indicating susceptibility to photosynthetic downregulation and increased dissipation under future drought regimes. Neither other encroacher experienced sustained energy dissipation in the dry period, though P. glandulosa did experience marked reductions in photosynthesis, photochemical yields, and increased regulatory dynamic energy dissipation.https://ps.ueb.cas.cz/artkey/phs-202303-0003_excess-energy-and-photosynthesis-responses-to-seasonal-water-limitations-in-co-occurring-woody-encroachers-of.phpcarbon cyclingdrought avoiderdrought tolerantgrasslandsnonphotochemical quenchingsavannas |
| spellingShingle | H.D. RAUB N. RAJAN K.J. MCINNES J.B. WEST Excess energy and photosynthesis: responses to seasonal water limitations in co-occurring woody encroachers of the semi-arid Southern Great Plains Photosynthetica carbon cycling drought avoider drought tolerant grasslands nonphotochemical quenching savannas |
| title | Excess energy and photosynthesis: responses to seasonal water limitations in co-occurring woody encroachers of the semi-arid Southern Great Plains |
| title_full | Excess energy and photosynthesis: responses to seasonal water limitations in co-occurring woody encroachers of the semi-arid Southern Great Plains |
| title_fullStr | Excess energy and photosynthesis: responses to seasonal water limitations in co-occurring woody encroachers of the semi-arid Southern Great Plains |
| title_full_unstemmed | Excess energy and photosynthesis: responses to seasonal water limitations in co-occurring woody encroachers of the semi-arid Southern Great Plains |
| title_short | Excess energy and photosynthesis: responses to seasonal water limitations in co-occurring woody encroachers of the semi-arid Southern Great Plains |
| title_sort | excess energy and photosynthesis responses to seasonal water limitations in co occurring woody encroachers of the semi arid southern great plains |
| topic | carbon cycling drought avoider drought tolerant grasslands nonphotochemical quenching savannas |
| url | https://ps.ueb.cas.cz/artkey/phs-202303-0003_excess-energy-and-photosynthesis-responses-to-seasonal-water-limitations-in-co-occurring-woody-encroachers-of.php |
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