Abstract
Abstract Increasing water stress situations were imposed on Schefflera arboricola Hayata ‘Compacta’ for up to 7 days under controlled growth chamber conditions. Net CO2 exchange and transpiration rates, stomatal conductance to water vapor and xylem water potential were measured at constant temperature, photosynthetic photon flux density (PPFD), and atmospheric humidity. A strong relationship was found for transpiration and CO2 exchange process. When the water content of the substrate decreased as a result of transpiration and soil surface evaporation, both transpiration and CO2 exchange rates decreased drastically. Xylem water potential remained fairly constant during this soil moisture deficit. Following the drying cycle, efficient and fast recovery of the plants was observed.
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