Effects of environmental factors on dark-adapted photosynthetic induction

Plants grow in a variable environment. While the effects of various environmental factors such as CO2 concentration, temperature, air humidity, and blue light on steady-state photosynthesis have been well documented, there has been less focus on the effects of these factors on photosynthesis in fluctuating light.

Photosynthetic induction and stomatal conductance in dark-adapted tomato leaves.
Photosynthetic induction (A, C, E) and stomatal conductance (B, D, F) in dark-adapted tomato leaves, as affected by Ca (A, B), Tleaf (C, D) and VPDleaf-air (E, F). Irradiance was raised from 0 to 1000 µmol m−2 s−1 at time = 0 and kept steady for 60 min. In A, C and E, the first 30 min of induction are shown. Mean ± SE (n = 5).

Kaiser et al. reveal that these factors influence photosynthetic induction and its underlying processes in dark-adapted tomato leaves. Photosynthetic induction rates (PIR) increased in high CO2 concentration and decreased in low air humidity, while leaf temperature caused a slight raise and blue light had no impact on PIR.

Written by Annals of Botany Office

The Annals of Botany Office is based at the University of Oxford.

Silkmoth cocoon

Super silk and mine-detectors

International Women’s Day 2017: Celebrating Professor Winifred Pennington