ArticleJournal of experimental botany2023
Elevated [CO2] negatively impacts C4 photosynthesis under heat and water stress without penalizing biomass.
Article in Journal of experimental botany, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.
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11 citing papers in PubMed, 29 citations in OpenAlex.
- Water Availability and Hydraulic Strategies Control Leaf Thermoregulation and Damage During Heat Stress and Recovery in Temperate Tree Species.Plant, cell & environment · 2026Article
- Distinguished Features of Adaptive Strategies of Halophytes and Glycophytes with Different Types of Photosynthesis in Response to Climatic Stressors.Plants (Basel, Switzerland) · 2026Review
- Methyl jasmonate-loaded chitosan nanoparticles and biochar improve maize thermotolerance.Scientific reports · 2026Article
- Multi-omic profiles of Sorghum genotypes with contrasting heat tolerance connect pathways related to thermotolerance.Journal of experimental botany · 2025Article
- Regulation of Light Absorption and Energy Dissipation in Sweet Sorghum Under Climate-Relevant COBiology · 2025Article
- Shining light on photosynthesis.Journal of experimental botany · 2025Article
- Elevated Growth Temperature Modifies Drought and Shade Responses ofPlants (Basel, Switzerland) · 2025Article
- Plant Nitrogen Assimilation: A Climate Change Perspective.Plants (Basel, Switzerland) · 2025Review
- Mesophyll airspace unsaturation drives CProceedings of the National Academy of Sciences of the United States of America · 2024Article
- Drought Has a Greater Negative Effect on the Growth of the CPlants (Basel, Switzerland) · 2024Article
- Elevated CO2 alters photosynthesis, growth and susceptibility to powdery mildew of oak seedlings.The Biochemical journal · 2023Article
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Authors and funding
3 authors at 2 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Elevated [CO2] (eCO2) and water stress reduce leaf stomatal conductance (gs), which may affect leaf thermoregulation during heat waves (heat stress). Two sorghum lines, with different leaf width were grown in a glasshouse at a mean day temperature of 30 °C, under different [CO2] and watering levels, and subjected to heat stress (43 °C) for 6 d at the start of the reproductive stage. We measured leaf photosynthetic and stomatal responses to light transients before harvesting the plants. Photosynthesis at growth conditions (Agrowth) and biomass accumulation were enhanced by eCO2 under control conditions. Heat stress increased gs, especially in wider leaves, and reduced the time constant of stomatal opening (kopen) at ambient [CO2] but not eCO2. However, heat stress reduced photosynthesis under water stress and eCO2 due to increased leaf temperature and reduced evaporative cooling. eCO2 prevented the reduction of biomass under both water and heat stress, possibly due to improved plant and soil water status as a result of reduced gs. Our results suggest that the response of the C4 crop sorghum to future climate conditions depends on the trade-off between low gs needed for high water use efficiency and drought tolerance, and the high gs needed for improved thermoregulation and heat tolerance under an eCO2 future.
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