Carbon assimilation of petunia cuttings in a non-disturbed rooting environment: Response to environmental key factors and adventitious root formation

► CO2 gas exchange of cuttings was monitored in a non-disturbed rooting environment. ► Photosynthesis is not generally subject to adventitious root formation. ► Photosynthesis significantly contributes to the carbon balance of petunia cuttings. ► Light and CO2 concentration are key factors limiting photosynthesis.