Synergistic effects of drought and heat stress on Medicago truncatula: understanding growth response and photosynthetic mechanisms
Drought and heat stress significantly threaten forage crop development and photosynthetic activity in the Mediterranean region. This study investigated the physiological responses and photosynthetic activity of two Medicago truncatula lines TN6.18 and F83005.5 (F83), to single and combined heat and...
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| Format: | Article |
| Language: | English |
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Academy of Sciences of the Czech Republic, Institute of Experimental Botany
2025-07-01
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| Series: | Photosynthetica |
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| Online Access: | https://ps.ueb.cas.cz/artkey/phs-202502-0008_synergistic-effects-of-drought-and-heat-stress-on-medicago-truncatula-understanding-growth-response-and-photos.php |
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| author | N. Ressaissi W. MNAFGUI N. MAIZA F. ZRIBI W. ZORRIG N. LUDIDI M.T. SANCHEZ-BALLESTA M. BADRI |
| author_facet | N. Ressaissi W. MNAFGUI N. MAIZA F. ZRIBI W. ZORRIG N. LUDIDI M.T. SANCHEZ-BALLESTA M. BADRI |
| author_sort | N. Ressaissi |
| collection | DOAJ |
| description | Drought and heat stress significantly threaten forage crop development and photosynthetic activity in the Mediterranean region. This study investigated the physiological responses and photosynthetic activity of two Medicago truncatula lines TN6.18 and F83005.5 (F83), to single and combined heat and drought stress treatments. Biomass traits, leaf gas exchange, and photosystem activities were evaluated. Our findings indicate a reduction in biomass parameters under heat, drought, and combined stress on both lines, particularly in F83. The stomatal conductance and photosynthetic parameters exhibited differential responses, with F83 reducing its stomatal conductance under drought stress, while TN6.18 was adapted by opening its stomata. Moreover, in TN6.18, combined stress enhanced protection mechanisms in PSI, while F83 showed changes in PSII efficiency. These insights deepen our understanding of plant responses to abiotic stresses and offer strategies for improving tolerance and resilience in changing environmental conditions. |
| format | Article |
| id | doaj-art-0accef1ce0aa4ab2b95e4a640b1a0c7c |
| institution | Kabale University |
| issn | 0300-3604 1573-9058 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Academy of Sciences of the Czech Republic, Institute of Experimental Botany |
| record_format | Article |
| series | Photosynthetica |
| spelling | doaj-art-0accef1ce0aa4ab2b95e4a640b1a0c7c2025-08-20T03:28:51ZengAcademy of Sciences of the Czech Republic, Institute of Experimental BotanyPhotosynthetica0300-36041573-90582025-07-0163215116110.32615/ps.2025.008phs-202502-0008Synergistic effects of drought and heat stress on Medicago truncatula: understanding growth response and photosynthetic mechanismsN. Ressaissi0W. MNAFGUI1N. MAIZA2F. ZRIBI3W. ZORRIG4N. LUDIDI5M.T. SANCHEZ-BALLESTA6M. BADRI7Laboratory of Extremophile Plants, Centre of Biotechnology of Borj Cedria, P.O. Box 901, 2050 Hammam-Lif, TunisiaLaboratory of Extremophile Plants, Centre of Biotechnology of Borj Cedria, P.O. Box 901, 2050 Hammam-Lif, TunisiaLaboratory of Extremophile Plants, Centre of Biotechnology of Borj Cedria, P.O. Box 901, 2050 Hammam-Lif, TunisiaLaboratory of Extremophile Plants, Centre of Biotechnology of Borj Cedria, P.O. Box 901, 2050 Hammam-Lif, TunisiaLaboratory of Extremophile Plants, Centre of Biotechnology of Borj Cedria, P.O. Box 901, 2050 Hammam-Lif, TunisiaPlant Stress Tolerance Laboratory, University of Mpumalanga, Private Bag X112831, Mbombela 1200, South AfricaLaboratory of Biotechnology and Postharvest Quality, Institute of Food Science, Technology and Nutrition (ICTAN-CSIC), Jose Antonio Novais 6, 28040 Madrid, SpainLaboratory of Extremophile Plants, Centre of Biotechnology of Borj Cedria, P.O. Box 901, 2050 Hammam-Lif, TunisiaDrought and heat stress significantly threaten forage crop development and photosynthetic activity in the Mediterranean region. This study investigated the physiological responses and photosynthetic activity of two Medicago truncatula lines TN6.18 and F83005.5 (F83), to single and combined heat and drought stress treatments. Biomass traits, leaf gas exchange, and photosystem activities were evaluated. Our findings indicate a reduction in biomass parameters under heat, drought, and combined stress on both lines, particularly in F83. The stomatal conductance and photosynthetic parameters exhibited differential responses, with F83 reducing its stomatal conductance under drought stress, while TN6.18 was adapted by opening its stomata. Moreover, in TN6.18, combined stress enhanced protection mechanisms in PSI, while F83 showed changes in PSII efficiency. These insights deepen our understanding of plant responses to abiotic stresses and offer strategies for improving tolerance and resilience in changing environmental conditions.https://ps.ueb.cas.cz/artkey/phs-202502-0008_synergistic-effects-of-drought-and-heat-stress-on-medicago-truncatula-understanding-growth-response-and-photos.phpcombined stressdroughtfodder legumegrowthphotosynthetic parameters |
| spellingShingle | N. Ressaissi W. MNAFGUI N. MAIZA F. ZRIBI W. ZORRIG N. LUDIDI M.T. SANCHEZ-BALLESTA M. BADRI Synergistic effects of drought and heat stress on Medicago truncatula: understanding growth response and photosynthetic mechanisms Photosynthetica combined stress drought fodder legume growth photosynthetic parameters |
| title | Synergistic effects of drought and heat stress on Medicago truncatula: understanding growth response and photosynthetic mechanisms |
| title_full | Synergistic effects of drought and heat stress on Medicago truncatula: understanding growth response and photosynthetic mechanisms |
| title_fullStr | Synergistic effects of drought and heat stress on Medicago truncatula: understanding growth response and photosynthetic mechanisms |
| title_full_unstemmed | Synergistic effects of drought and heat stress on Medicago truncatula: understanding growth response and photosynthetic mechanisms |
| title_short | Synergistic effects of drought and heat stress on Medicago truncatula: understanding growth response and photosynthetic mechanisms |
| title_sort | synergistic effects of drought and heat stress on medicago truncatula understanding growth response and photosynthetic mechanisms |
| topic | combined stress drought fodder legume growth photosynthetic parameters |
| url | https://ps.ueb.cas.cz/artkey/phs-202502-0008_synergistic-effects-of-drought-and-heat-stress-on-medicago-truncatula-understanding-growth-response-and-photos.php |
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