Environmental factors determine the rate of transpiration in plant leaves
Multiple studies demonstrate that environmental factors such as temperature, light intensity, vapor pressure deficit, and water availability directly determine and regulate the rate of transpiration in plant leaves.
The claim is specific and empirically testable, passing Step 0 easily. Multiple provided papers directly examine how environmental factors like light intensity, temperature, vapor pressure deficit, and moisture drive and alter leaf transpiration rates. Because all relevant papers support the relationship and no evidence refutes it, the verdict is SUPPORTED.
RW Downes. Effect of Light Intensity and Leaf Temperature on Photosynthesis and Transpiration in Wheat and Sorghum. 1970. https://doi.org/10.1071/bi9700775
Demonstrates that light intensity and temperature alter transpiration rates in wheat and sorghum.
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Chiara Amitrano, Murat Kacira, Carmen Arena, Stefania De Pascale, Veronica De Micco. Leaf anatomical traits shape lettuce physiological response to vapor pressure deficit and light intensity. 2025. https://doi.org/10.1007/s00425-025-04774-2
Shows that vapor pressure deficit and light intensity directly drive lettuce physiological and transpiration responses.
Liu H, Wang J, Sun X, Zheng Z, Zhou W. Urban-rural differences in transpiration patterns of <i>Pinus tabuliformis</i> and environmental drivers.. 2026. https://doi.org/10.3389/fpls.2026.1861479
Finds that urban-rural environmental differences and drivers like VPD strongly shape transpiration patterns in trees.
Rakocevic M. One-Year Phenology of Leaf Gas Exchange Dynamics in <i>Coccocypselum lanceolatum</i>.. 2026. https://doi.org/10.3390/biology15130994
Reports that leaf transpiration is directly correlated with environmental energy factors such as PPFD and air temperature.
Puangbut D, Jogloy S, Songsri P, Jongrungklang N. Adaptive photosynthetic in drought-resistant and susceptible Jerusalem artichoke genotypes under elevated CO₂ and light intensity during drought stress.. 2026. https://doi.org/10.1186/s12870-026-08195-5
Indicates that varying light intensity, CO2, and drought conditions significantly impact plant transpiration rates.
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